Klamath/Trinity Program Biological Information Documents

2024/25 Trinity River Project trapping summary through Julian week 36

Wed, 11 Sep 2024 15:12:23 -0700

Trapping summary results, Trinity River, 2024-25 field season - Trapping summary of salmonids on Trinity River, at Junction City weir, Willow Creek weir, and Trinity River Hatchery.

Klamath River Basin fall Chinook Salmon spawner escapement, in-river harvest and run-size estimates, 1978 - 2023.

Tue, 26 Mar 2024 11:17:20 -0700

Klamath River Basin Fall Chinook Salmon spawner escapement, in-river harvest and run-size estimates - Klamath River Basin fall Chinook salmon spawner escapement, in-river harvest and run-size estimates, AKA MEGATABLE

Chinook Salmon, Coho Salmon and fall-run steelhead run-size estimates using mark-recapture methods, 2022-23 season. Final annual report.

Thu, 14 Dec 2023 14:57:31 -0800

Annual Report Trinity River Basin Salmon and Steelhead Monitoring Project - CA Fish and Wildlife's Trinity River Project conducted tagging and recapture operations from June 2022 through March 2023 to produce run size, angler harvest, and spawner escapement estimates of spring and fall Chinook Salmon (Oncorhynchus tshawytscha), Coho Salmon (O. kisutch), and fall steelhead (O. mykiss) in the Trinity River basin. Run size estimates are used in annual fishery management decisions, feeding into the Pacific Fishery Management Council's Klamath River basin fishery regulation and harvest allocation process. Using a Petersen mark-recapture methodology, we estimated 13,262 (95% CI 12,420 - 14,136) spring Chinook Salmon migrated into Trinity River basin upstream of Junction City weir. The run was comprised of an estimated 575 jacks (493 natural-origin [NOR] and 82 hatchery-origin [HOR]) and 12,687 adults. An estimated 14,179 (95% CI 12,909 - 15,511) fall Chinook Salmon migrated upstream of Willow Creek weir in 2022. The run consisted of an estimated 3,772 jacks (1,880 NOR and 1,892 HOR) and 10,407 adults. Coho Salmon run size and escapement in the Trinity River upstream of Willow Creek weir were both estimated at 6,551 (95% CI 5,995 - 7,135), as no harvest was reported. The run consisted of 617 jacks (25 NOR and 591 HOR) and 5,934 adults (550 NOR and 5,384 HOR). Coho Salmon run size and escapement in the Trinity River upstream of Junction City weir were both estimated at 4,292 (95% CI 3,710 - 4,916), with no reported harvest. Escapement consisted of 282 jacks (28 NOR and 254 HOR) and 4,010 adults (356 NOR and 3,653 HOR). Using a Petersen mark-recapture methodology we estimated 10,597 (95% CI 7,962 - 14,780) adult fall steelhead returned to the Trinity River basin upstream of Willow Creek weir. Anglers harvested an estimated 322 (126 NOR, 196 HOR) adult fall steelhead upstream of the weir, leaving 10,274 (7,642 NOR and 2,632 HOR) fish as potential spawners. Of those potential spawners, 1,051 (53 NOR, 998 HOR) were recovered at TRH, and an estimated 9,223 (7,589 NOR, 1,634 HOR) escaped to natural areas.

Trinity Tag Return Form

Mon, 10 Jul 2023 14:20:41 -0700

Trinity tag return form - Form to submit with tags acquired from Trinity River salmonids.

Klamath River Basin spring Chinook Salmon spawner escapement, In-river harvest and run-size estimates, 1980-2021.

Mon, 10 Jul 2023 13:43:16 -0700

Klamath River Basin Spring Chinook Salmon Spawner Escapement, River Harvest and Run-size Estimates, 1980-2021 - Klamath River Basin Spring Chinook Salmon Spawner Escapement, River Harvest and Run-size Estimates, 1980-2022

2021 Angler Creel Surveys in the lower Klamath River

Mon, 10 Jul 2023 12:39:33 -0700

2021 Klamath River estuary creel survey - A creel survey was conducted along the lower Klamath River (Pacific Ocean to Hwy 96 Bridge in Weitchpec) August 6, 2021 through November 4, 2021 to estimate the recreational fishery effort, catch and harvest of fall Chinook Salmon (Oncorhynchus tshawytscha), Coho Salmon (Oncorhynchus kisutch) and steelhead (Oncorhynchus mykiss). A goal of the creel survey is to help determine the contributions made by Trinity River Hatchery, Iron Gate Hatchery and naturally produced salmonids to the annual recreational harvest in the lower Klamath River. Information provided by the creel survey will help assess the production and harvest goals of the California Department of Fish and Wildlife, in addition to providing real-time monitoring needed for in-season recreational harvest management. In 2021, the fall Chinook Salmon fishery was open to recreational fishing. Results from the 2021 creel survey and subsequent Klamath River Technical Team meeting indicate an estimated harvest of 3,448 (1,149 adult and 2,299 jack) fall Chinook Salmon and 125 (83 adults and 42 half-pounders) steelhead for the lower Klamath River. The 2021 inriver recreational quota was 1,221 adult fall Chinook Salmon for the entire basin, with a lower Klamath River sector quota of 611 adult fall Chinook Salmon. Hatchery-origin fall Chinook Salmon represent an estimated 361 fish (10.47 percent) of the estimated harvest in the lower Klamath River, comprised entirely of Trinity River Hatchery (173 fish) and Iron Gate Hatchery (188) fish. Seasonal summaries and interannual comparisons of angler effort, angler harvest, harvest timing, length frequencies, hatchery compositions and coded-wire tag recoveries are presented.

2020 Angler Creel Surveys in the Lower Klamath River

Mon, 10 Jul 2023 12:24:37 -0700

2020 Klamath River estuary creel survey - A creel survey was conducted along the lower Klamath River (Pacific Ocean to Hwy 96 Bridge in Weitchpec) August 6, 2020 through November 4, 2020 to estimate the recreational fishery effort, catch and harvest of fall Chinook Salmon (Oncorhynchus tshawytscha), Coho Salmon (Oncorhynchus kisutch) and steelhead (Oncorhynchus mykiss). A goal of the creel survey is to help determine the contributions made by Trinity River Hatchery, Iron Gate Hatchery and naturally produced salmonids to the annual recreational harvest in the lower Klamath River. Information provided by the creel survey will help assess the production and harvest goals of the California Department of Fish and Wildlife and the Trinity River Restoration Program, in addition to providing realtime monitoring needed for in-season recreational harvest management. In 2020, the fall Chinook Salmon fishery was open to recreational fishing. Results from the 2020 creel survey and subsequent Klamath River Technical Team meeting indicate an estimated harvest of 3,534 (3,152 adult and 382 jack) fall Chinook Salmon and 49 (35 adults and 14 half-pounders) steelhead for the lower Klamath River. The 2020 inriver recreational quota was 1,296 adult fall Chinook Salmon for the entire basin, with a lower Klamath River sector quota of 648 adult fall Chinook Salmon. Hatchery-origin fall Chinook Salmon represent an estimated 481 fish (13.61 percent) of the estimated harvest in the lower Klamath River, comprised entirely of Trinity River Hatchery (447 fish) and Iron Gate Hatchery (34) fish. Seasonal summaries and interannual comparisons of angler effort, angler harvest, harvest timing, length frequencies, hatchery compositions and coded-wire tag recoveries are presented.

North Coast Salmon Report Card Annual Report 2022

Mon, 10 Jul 2023 12:13:21 -0700

North Coast salmon report cards - Recreational salmon harvest on the Klamath, Trinity and Smith Rivers requires the possession and use of the North Coast Salmon Report Card. Anglers use this card to self-report effort and catch, primarily for Chinook Salmon. However, as a self-reporting tool, the card does not currently provide a robust data set, with about a one-third return rate. At this point, salmon card data is not used for harvest estimates.

Shasta River Chinook and coho observations in 2012-2013, Siskiyou County, CA

Sun, 16 Apr 2023 14:42:48 -0700

Klamath Basin salmonid monitoring, Shasta River - A total of 29,544 fall run Chinook salmon (Chinook, Oncorhynchus tshawytscha) were estimated to have entered the Shasta River during the 2012 spawning season, the biggest run since the Klamath River Project began monitoring in 1978. An underwater video camera was operated in the flume of the Shasta River Fish Counting Facility (SRFCF) twenty four hours a day, seven days a week, from August 21, 2012 until December 20, 2012. The first Chinook was observed on September 2, 2012 and the last Chinook on November 28, 2012. KRP staff also processed a total of 609 Chinook carcasses during spawning ground surveys, and a total of 104 (a systematic 1:10 sample) Chinook carcasses were collected as wash backs against the SRFCF weir during the season. Chinook carcasses sampled in the spawning ground surveys ranged in fork length (FL) from 40 cm to 88 cm and grilse were determined to be < 60 cm in FL. Carcasses sampled as weir wash backs were checked for marks and clips, scales were taken, and sex and fork length information were collected. The run was comprised of 1,950 grilse (6.6%), and 27,594 adults (93.4%). A net total of 31 adipose-clipped (AD) Chinook were observed passing through the SRFCF during the season, and these fish were assumed to be of hatchery origin. The heads of 7 AD Chinook were recovered, 3 as wash backs on the weir and 4 in the spawning ground surveys. Six of the seven had positive CWT identification, and the seventh tag was unreadable. Tag codes indicated five 3 year old fish and one 4 year old fish. Five of the fish had been tagged at Iron Gate Hatchery and one, a 3 year old, was tagged and released from Trinity River Hatchery. Expansion of the 6 known tag codes and the 25 unknown tag codes based on proportions of coded wire tags (CWTs) recovered at Iron Gate Hatchery resulted in an estimated hatchery contribution of 126 Chinook, or 0.43% of the total run observed in 2012. A net total of 115 coho salmon (coho, Oncorhynchus kisutch) were estimated to have entered the Shasta River during the 2012 season. The first coho of the season was observed passing through the SRFCF on October 10, 2012, and the last coho was observed swimming downstream through the SRFCF on November 29, 2012. The net number of coho to have entered and remained in the Shasta River in 2012 was 115. Based on PIT tag detections and caudal punch and left maxillary clip observations, an estimated 81, or 70% of the coho salmon entering the Shasta River were of Iron Gate Hatchery origin. A net total of 186 adult and 187 sub-adult steelhead trout (Oncorhynchus mykiss) were observed passing through the SRFCF during the 2012 season, although the video weir operation period does not cover the entire migration period for steelhead trout.

Shasta River Chinook and coho observations in 2009-2010, Siskiyou County, CA

Sun, 16 Apr 2023 14:42:46 -0700

Klamath Basin salmonid monitoring, Shasta River - A total of 6,287 Chinook salmon (Chinook, Oncorhynchus tshawytscha) were estimated to have entered the Shasta River during the 2009 spawning season. An underwater video camera was operated in the flume of the Shasta River Fish Counting Facility (SRFCF) twenty four hours a day, seven days a week, from September 1, 2009 until December 31, 2009. The first Chinook was observed on September 5, 2009 and the last Chinook on December 19, 2009. Klamath River Project (KRP) staff installed a trap immediately upstream of, and connected to the video flume, and a total of 388 Chinook were trapped and sampled for fork length (FL), sex and presence/absence of marks or tags between September 15, 2009 and December 24, 2009. KRP staff also processed a total of 189 Chinook carcasses during spawning ground surveys, and a total of 330 Chinook carcasses were collected as wash backs against the SRFCF weir during the season. Chinook ranged in FL from 38 cm to 100 cm and grilse were determined to be < 60 cm in FL. The run was comprised of 292 grilse (4.6%), and 5,995 adults (95.4%). A net total of 9 adipose-clipped (AD) Chinook were observed passing through the SRFCF during the season, and these fish were assumed to be of hatchery origin. The heads from two AD Chinook were recovered from carcasses examined in the wash back sample, but only one contained a coded wire tag (CWT). Analysis of the tag recovered from this head indicated that this was a brood year 2004 fish released from Iron Gate Hatchery (IGH) as a yearling in 2005. Expansion of this CWT by the production multiplier yielded an estimate of 8 hatchery origin Chinook. The remaining 7 AD Chinook were observed in the video flume but not recovered. An estimate of hatchery contribution was derived based on applying the proportion of CWT recoveries observed at Iron Gate Hatchery (IGH) to these 7 ad-clipped fish. Using this method, a total of 123 additional hatchery origin Chinook were estimated to have entered the Shasta River during the 2009 run. This yields a total estimate of 131 hatchery Chinook, or 2.1% of the total run observed in 2009. A net total of 9 coho salmon (coho, Oncorhynchus kisutch) were estimated to have entered the Shasta River during the 2009-10 season. The first coho of the season was observed passing through the SRFCF on November 2, 2009 and the last coho was observed swimming downstream through the SRFCF on December 21, 2009. All coho observed in the video review and in the trap appeared to be males. A total of 22 coho were observed passing upstream through the SRFCF and 14 coho were observed passing downstream from November 2, 2009 to December 21, 2009. Since it cannot be assumed that the 13 coho observed moving downstream through the SRFCF remained in the Shasta River, the net number of coho that are known to have remained in the Shasta River is 9.

Shasta River Chinook and coho observations in 2011-2012, Siskiyou County, CA

Sun, 16 Apr 2023 14:42:44 -0700

Klamath Basin salmonid monitoring, Shasta River -

Scott River salmon studies - 2009 final report

Sun, 16 Apr 2023 14:42:40 -0700

Salmon run monitoring on Scott River (Klamath Basin), CA - The California Department of Fish and Game’s (Department), Klamath River Project (KRP) operated a video fish counting facility and conducted cooperative spawning ground surveys (carcass surveys) on the Scott River during the 2009 fall-run Chinook salmon (Oncorhynchus tshawytscha) and coho salmon (Oncorhynchus kisutch) spawning season. The purpose of these surveys is to describe the run characteristics of adult fall-run Chinook salmon and coho salmon into the Scott River. Video fish counting operations began on October 5, 2009 and ended on January 11, 2010. The total number of Chinook salmon that entered the Scott River during the 2009 season is estimated to be 2,211 fish. Based on the proportion of male and female Chinook salmon that were sampled during the spawning ground surveys the run was comprised of approximately 688 (31.1%) males and 1,523 (68.9%) females. Based on a scales age analysis, adults comprised approximately 98.0% (2,167 fish) and grilse comprised 2.0% (44 fish) of the run. Males ranged in fork length (FL) from 38cm to 106cm and averaged 75.1cm. Females ranged in FL from 49cm to 98cm and averaged 72.4cm. KRP staff estimated that none of the Chinook salmon were of hatchery origin. The first adult coho salmon was observed at the Scott River Fish Counting Facility on November 20, 2009 and the last coho salmon was observed on January 1, 2010. A total of 81 coho salmon were observed moving upstream through the Scott River Fish Counting Facility (SRFCF) during the season. Due to the extremely low abundance of coho salmon returning in 2009 and the lack of an adequate sample collected during spawning ground survey efforts the proportion of male to females, the proportion of age two and age three fish and the proportion of hatchery origin fish is unknown. Future advances in video image quality may allow for these metrics to be estimated without handling the fish.

Scott River salmon studies - 2012 final report

Sun, 16 Apr 2023 14:42:38 -0700

Salmon run monitoring on Scott River (Klamath Basin), CA - The California Department of Fish and Wildlife’s (Department), Klamath River Project (KRP) operated a video fish counting facility and conducted cooperative spawning ground surveys (carcass surveys) on the Scott River during the 2012 fall-run Chinook salmon (Chinook, Oncorhynchus tshawytscha) and coho salmon (Oncorhynchus kisutch) spawning season. The purpose of these surveys is to describe the run characteristics of adult Chinook salmon and coho salmon into the Scott River. Video fish counting operations began on September 26, 2012 and ended on November 29, 2012 due to high river flows. The total number of Chinook salmon that entered the Scott River during the 2012 season is estimated to be 9,352 fish. Based on the proportion of male and female Chinook salmon that were sampled during the spawning ground surveys the run was comprised of approximately 5,443 (58.2%) males and 3,909 (41.8%) females. Based on scale age analysis, adults comprised approximately 80.9% (7,566 fish) and grilse comprised 19.1% (1,786 fish) of the run. Males ranged in fork length (FL) from 33cm to 101cm and averaged 66.6cm. Females ranged in FL from 42cm to 98cm and averaged 70.7cm. KRP staff estimated that none of the Chinook salmon that returned were of hatchery origin. The first adult coho salmon was observed at the Scott River Fish Counting Facility on October 27, 2012 and the last coho salmon was observed on November 29, 2012. A total of 201 coho salmon were observed moving upstream through the Scott River Fish Counting Facility (SRFCF) during the season. Zero coho were estimated in the main stem or tributaries downstream of the SRFCF. Due to high flows the SRFCF was removed prior to the historical end of adult coho migration, therefore the 2012 estimate of 201 should be considered a minimum number. Based on the proportion of male and female coho salmon that were sampled during the season the run was comprised of approximately 115 (57.1%) males and 86 (42.9%) females. Based on video data, adults comprised approximately 93.7% (188 fish) and grilse comprised 6.3% (13 fish) of the run. Males ranged in fork length (FL) from 37cm to 65cm and averaged 48.0cm. Females ranged in FL from 64cm to 70cm and averaged 67.3cm. Based on observed video data 0.81% of the coho salmon (2) were estimated to be of hatchery origin.

Scott River salmon studies - 2011 final report

Sun, 16 Apr 2023 14:42:35 -0700

Salmon run monitoring on Scott River (Klamath Basin), CA -

Iron Gate Hatchery - 2008 annual report: Recovery of fall-run Chinook and coho salmon at Iron Gate Hatchery - Final

Sun, 16 Apr 2023 14:42:31 -0700

Recovery of fall-run Chinook and coho salmon at Iron Gate Hatchery - A total of 11,231 fall-run Chinook salmon (Chinook) entered IGH during the fall 2008 spawning season. Chinook (Oncorhynchus tshawytscha) began entering Iron Gate Hatchery (IGH) on September 29, 2008, and the last was observed on December 4, 2008. Klamath River Project (KRP) staff systematically sampled 1 in every 10 Chinook as well as all adipose-clipped Chinook during recovery efforts. The sex was determined, scale samples were taken and fork length (FL) was measured for all sampled Chinook. Randomly sampled male Chinook ranged in size from 35 cm to 100 cm fork length, and randomly sampled female Chinook ranged from 42 cm to 90 cm fork length. Analysis of the length-frequency distribution for randomly sampled Chinook males indicates that the cutoff point between grilse and adults occurred at < 59 cm fork length. During the 2008 spawning season, KRP staff estimated that 2,414 (21.5%) of the run were grilse according to length frequency analysis. Females accounted for 42.3% (4,750) of the run while males accounted for 57.7% (6,481). The 2008 run total contributed roughly 12% to the total (Klamath basin) in-river run and 17% to the total spawner escapement. Based on coded wire tag expansion, KRP staff estimated that 100% of the Chinook entering IGH during the 2008 season were of hatchery origin. A total of 1,296 coho salmon (Oncorhynchus kisutch) (coho) entered IGH during the 2008 spawning season. The recorded dates for the coho run were from October 22, 2008 to December 18, 2008. KRP staff collected biological data (sex determination, FL, presence of marks or clips and scale samples) on 713 coho, which represented 100% of the coho that were spawned upon returning to IGH. Males ranged in size from 32 cm to 80 cm fork length, while female coho ranged in size from 52 cm to 79 cm fork length. Analysis of the fork length distribution for 343 male coho indicates that the cutoff point between grilse and adults occurred at < 58 cm. FL. IGH counts for the 2008 coho spawning season included 770 adult females, 508 adult males, and 18 grilse. IGH staff counted 1,268 coho with left maxillary clips, 2 with a right maxillary clip, and 1 with both a left maxillary and right maxillary clip. No adipose-clipped coho were observed in 2008. A total of 15 unmarked coho salmon were caudal clipped, Floy tagged and released from IGH to the Klamath River. Of these, none returned to IGH, one was recovered as a carcass on nearby Bogus Creek, and one was observed passing through the video weir on Bogus Creek (possibly the same fish). No floy tags were recovered during spawning ground surveys on either the Scott River or Shasta River. Additionally, no fish marked with floy tags were observed passing through the weirs or sampled as washbacks at either the Shasta River or Scott River Fish Counting Facilities. All unmarked coho returning to IGH during the 2008 season were checked for coded wire tags (CWT’s) and none were found.

Iron Gate Hatchery - 2009 annual report: Recovery of fall-run Chinook and coho salmon at Iron Gate Hatchery - Final

Sun, 16 Apr 2023 14:42:29 -0700

Recovery of fall-run Chinook and coho salmon at Iron Gate Hatchery - A total of 13,492 fall-run Chinook salmon, (Chinook, Oncorhynchus tshawytscha, entered Iron Gate Hatchery (IGH) during the fall 2009 spawning season from September 25, 2009 through November 30, 2009. Klamath River Project (KRP) staff systematically sampled 1 in every 10 Chinook as well as all adipose-clipped (AD) Chinook during recovery efforts, for a sample size of 2,158. Scale samples and sex and fork length data were collected for all sampled Chinook. Analysis of the length-frequency distribution for randomly sampled Chinook males indicates that the cutoff point between grilse and adults occurred at < 58 cm fork length. Randomly sampled male Chinook ranged in size from 41 to 101 cm. fork length, and randomly sampled female Chinook ranged from 56 to 92 cm. fork length. Based on length frequency analysis, KRP staff estimated that 8.4% (1,132) of the run were grilse. Females accounted for 53.9% (7,268) of the run while males accounted for 46.1% (6,224). The 2009 return to IGH contributed roughly 12% to the total (Klamath basin) in-river run and 18% to the total spawner escapement. Based on coded wire tag expansion, KRP staff estimated that 88% of the Chinook entering IGH during the 2009 season were of hatchery origin. 70 coho salmon (coho, Oncorhynchus kisutch) entered IGH during the 2009-10 spawning season, the lowest return since 1966. The recorded dates for the coho run were from October 16, 2009 to December 15, 2009. KRP staff collected biological data (sex, fork length, presence of marks or clips, scale samples, and tissue sample) on every fifth coho that entered the hatchery and every coho used for spawning. Otoliths were collected from every 10th random coho. The total number of coho sampled was 45. Males ranged in size from 38 to 75 cm. fork length, while females ranged in size from 54 to 71 cm. fork length. Based on the length frequency distribution of 22 male coho, grilse were estimated to be < 53 cm. fork length. Of the 22 males sampled by the KRP, 9 (41%) were estimated to be grilse. IGH counts for the 2009-10 coho spawning season included 25 adult females, 21 adult males, and 24 grilse. Of the coho sampled by KRP staff, 29 had left maxillary clips, 7 had right maxillary clips, and 9 had no clips. No adipose-clipped or coded wire tagged coho were recovered at Iron Gate Hatchery during the 2009-10 season.

Iron Gate Hatchery - 2012 annual report: Recovery of fall-run Chinook and coho salmon at Iron Gate Hatchery

Sun, 16 Apr 2023 14:42:28 -0700

Recovery of fall-run Chinook and coho salmon at Iron Gate Hatchery - A total of 40,015 fall-run Chinook salmon (Oncorhynchus tshawytscha), entered Iron Gate Hatchery (IGH) during the fall 2012 spawning season from September 26, 2012 through November 26, 2012. Klamath River Project (KRP) staff systematically sampled 1 in every 10 Chinook, as well as all adipose-clipped (AD) Chinook during recovery efforts, for a systematic random sample size of 3,885 and non-random sample size of 7,665. Scale samples, sex and fork length data were collected for all sampled Chinook. Analysis of the length-frequency distribution for systematically sampled Chinook males indicates that the preliminary cutoff point between grilse and adults occurred at = 59 centimeters (cm) fork length (FL). Systematically sampled male Chinook ranged in size from 40 to 98 cm FL, and systematically sampled female Chinook ranged from 56 to 93 cm FL. Based on scale age analysis, the Klamath River Technical Team (KRTT) estimated that 3.8% (1,537) of the run were grilse. Females accounted for 52.5% (21,014) of the run while males accounted for 47.5% (19,001). The 2012 return to IGH contributed roughly 12% to the total (Klamath basin) in-river run and 20% to the total spawner escapement. Based on coded wire tag expansion, KRP staff estimated that 84% of the Chinook entering IGH during the 2012 season were of hatchery origin.

Iron Gate Hatchery - 2011 annual report: Recovery of fall-run Chinook and coho salmon at Iron Gate Hatchery

Sun, 16 Apr 2023 14:42:26 -0700

Recovery of fall-run Chinook and coho salmon at Iron Gate Hatchery - A total of 18,039 fall-run Chinook salmon, (Chinook, Oncorhynchus tshawytscha, entered Iron Gate Hatchery (IGH) during the fall 2011 spawning season from October 4, 2011 through November 29, 2011. Klamath River Project (KRP) staff systematically (random) sampled 1 in every 10 Chinook as well as all adipose-clipped (AD) Chinook during recovery efforts, for a sample size of 4,976. Scale samples and sex and fork length data were collected for all sampled Chinook. Analysis of the length-frequency distribution for randomly sampled Chinook males indicates that the preliminary cutoff point between grilse and adults occurred at = 62 cm fork length. Randomly sampled male Chinook ranged in size from 41 to 103 cm. fork length, and randomly sampled female Chinook ranged from 55 to 93 cm. fork length. Based on scale age analysis, the KRTAT estimated that 52.9% (9,549) of the run were grilse. Females accounted for 26.5% (4,772) of the run while males accounted for 73.5% (13,267). The 2011 return to IGH contributed roughly 10% to the total (Klamath basin) in-river run and 12% to the total spawner escapement. Based on coded wire tag expansion, KRP staff estimated that 84% of the Chinook (both grilse and adults) entering IGH during the 2011 season were of hatchery origin. A total of 586 coho salmon (coho, Oncorhynchus kisutch) entered IGH during the 2011 spawning season. The recorded dates for the coho run were from October 10, 2011 to December 12, 2011. KRP staff collected biological data (sex, fork length, presence of marks or clips, scale samples, and tissue samples) on every coho that entered the hatchery as well as otoliths from coho used for spawning. Males ranged in size from 38 to 80 cm. fork length, while females ranged in size from 46 to 76 cm. fork length. Based on the length frequency distribution of 382 male coho, grilse were estimated to be < 55 cm. fork length, for an age composition of 22.5% grisle and 77.5% adult coho in 2011. Of the 586 coho sampled by KRP staff, 522 (89%) had left maxillary clips, 63 (10.9%) had no clips. and one (0.1%) had both a left and a right maxillary clip. Two adipose-clipped coho were recovered at IGH during the 2011 season. These 2 fish were scanned for the presence of a coded wire tag, but were negative. For the second year, coho were spawned at IGH in 2011using a spawning matrix provided weekly by NOAA Fisheries Salmon Genetics Repository in Santa Cruz, CA., using tissue samples obtained from coho as they entered IGH. All coho salmon (except for the first 22) entering IGH during the 2011 were pit tagged. A targeted number entering each week were also disc tagged and held pending genetic analysis for potential use as brood stock. Any coho not utilized as brood stock were released back to the Klamath River at Iron Gate Hatchery.

2009 Trinity River tributaries steelhead spawning survey report

Sun, 16 Apr 2023 12:08:36 -0700

Steelhead spawning and monitoring - This report documents the results of spawning surveys conducted by the California Department of Fish and Game on selected Trinity River tributaries from March through April of 2009. This is a continuation of spawning surveys on selected tributaries and serves to create an index of spawning steelhead abundance by enumerating redds. Between March and April 2009, we observed a total of 110 redds in 42.397 kilometers of surveyed habitat. Overall redd density for all tributaries surveyed was 2.595 redds/kilometer. The highest redd density occurred in East Fork Hayfork Creek (6.056 redds/km), while lowest density occurred in Dutch and Grass Valley Creeks (0 redds/km). Redds were observed in ten creeks surveyed; Deadwood, South Fork Indian, East Weaver, Eltapom, East Fork Hayfork, Tule, Little Browns Creek, Rusch, Sidney Gulch, and Big Creeks. No redds were observed in Dutch, Grass Valley, and West Weaver Creeks. Fish were observed in Deadwood, South Fork Indian, Little Browns, East Weaver, East Fork Hayfork, and Big Creeks. A total of 41 fish were observed during the survey, with 21 of them occurring in East Fork Hayfork Creek and 13 of them occurring in Deadwood Creek.

2008 Trinity River tributaries steelhead spawning survey report

Sun, 16 Apr 2023 12:08:34 -0700

Steelhead spawning survey and monitoring - This report documents the results of spawning surveys conducted by the California Department of Fish and Game on selected Trinity River tributaries from March through April of 2008. This is a continuation of spawning surveys on selected tributaries and serves to create an index of spawning steelhead abundance by enumerating redds. Between March and April 2008, we observed a total of 125 redds in 37.8 kilometers of surveyed habitat. Overall redd density for all tributaries surveyed was 3.31 redds/kilometer. The highest redd density occurred in Eltapom Creek (12.31 redds/km), while lowest density occurred in Maxwell Creek (0.40 redds/km). Redds were observed in nine creeks surveyed; Deadwood, South Fork Indian, Maxwell, Dutch, West Weaver, Eltapom, East Fork Hayfork, Tule, and Big Creeks. No redds were observed in Soldier, Grass Valley, and Potato Creeks. Fish were observed in Deadwood, South Fork Indian, Maxwell, Eltapom, East Fork Hayfork, and Tule Creeks. A total of 263 fish were observed during the survey, with 240 of them occurring in Deadwood Creek.

2006 Trinity River tributaries steelhead spawing survey report

Sun, 16 Apr 2023 12:08:33 -0700

Steelhead spawning survey and monitoring - This report documents the results of spawning surveys conducted by the California Department of Fish and Game on selected Trinity River tributaries from March through May of 2006. This is a continuation of spawning surveys on selected tributaries and serves to create an index of spawning steelhead abundance by enumerating redds. Between March and May 2006, we observed a total of 22 redds in 23.8 kilometers of surveyed habitat. Overall redd density for all tributaries surveyed was 0.92 redds/kilometer. The highest redd density occurred in East Fork of Hayfork Creek (2.65 redds/km), while zero redds were observed in four tributaries: South Fork Indian, Soldier, Deadwood, and Rusch Creeks. During the course of the surveys, crews encountered 16 adult steelhead, in only Deadwood and East Fork of Hayfork Creeks.

2007 Trinity River tributaries steelhead spawning survey report

Sun, 16 Apr 2023 12:08:31 -0700

Steelhead spawning survey and monitoring - This report documents the results of spawning surveys conducted by the California Department of Fish and Game on selected Trinity River tributaries from March through May of 2007. This is a continuation of spawning surveys on selected tributaries and serves to create an index of spawning steelhead abundance by enumerating redds. Between March and May 2007, we observed a total of 106 redds in 19.7 kilometers of surveyed habitat. Overall redd density for all tributaries surveyed was 5.38 redds/kilometer. The highest redd density occurred in Eltapom Creek (9.23 redds/km), while lowest density occurred in Soldier Creek (0.59 redds/km). Redds were observed in all creeks surveyed, and fish were observed in all except Maxwell and Soldier Creeks. A total of 100 fish were observed during the survey. 62 fish were observed in Deadwood Creek and 34 in East Fork of Hayfork Creek.

Iron Gate Hatchery - 2010 annual report: Recovery of fall-run Chinook and coho salmon at Iron Gate Hatchery

Sun, 16 Apr 2023 11:34:58 -0700

Results of salmon returns to Iron Gate Hatchery, Fall 2010. - A total of 11,347 fall-run Chinook salmon, (Chinook, Oncorhynchus tshawytscha, entered Iron Gate Hatchery (IGH) during the fall 2010 spawning season from September 24, 2010 through November 29, 2010. Klamath River Project (KRP) staff systematically (random) sampled 1 in every 10 Chinook as well as all adipose-clipped (AD) Chinook during recovery efforts, for a sample size of 1,980. Scale samples,sex, and fork length data were collected for all sampled Chinook. Analysis of the length-frequency distribution for randomly sampled Chinook males indicates that the cutoff point between grilse and adults occurred at = 62 cm fork length. Randomly sampled male Chinook ranged in size from 48 to 105 cm. fork length, and randomly sampled female Chinook ranged from 60 to 94 cm. fork length. Based on length frequency analysis, KRP staff estimated that 9.4% (1,071) of the run were grilse. Females accounted for 50.2% (5,692) of the run while males accounted for 49.8% (5,655). The 2010 return of fall Chinook to IGH contributed roughly 10.5% to the total (Klamath basin) in-river run and 16.3% to the total spawner escapement. Based on coded wire tag expansion, KRP staff estimated that 94% of the Chinook entering IGH during the 2010 season were of hatchery origin.

Scott River salmon studies - 2010 final report

Sun, 16 Apr 2023 11:34:56 -0700

Salmon run monitoring on Scott River (Klamath Basin), CA - Results of salmon monitoring studies on Scott River, CA during 2010.

Scott River salmon studies - 2008

Sun, 16 Apr 2023 11:26:33 -0700

Salmon run monitoring on Scott River (Klamath Basin), CA - 2008 Klamath River Project efforts (video fish weir, carcass surveys) on Scott River fall-run Chinook salmon

Iron Gate Hatchery - 2007 annual report

Sun, 16 Apr 2023 11:26:31 -0700

Iron Gate Hatchery (Klamath River) salmon recovery - A total of 17,149 Chinook salmon entered Iron Gate Hatchery (IGH) during the fall 2007 spawning season. Fall-run Chinook salmon (Oncorhynchus tshawytscha) began entering IGH on September 25, 2007, and the last was observed on December 10, 2007. Klamath River Project (KRP) staff systematically sampled 1 in every 10 Chinook as well as all adipose-clipped Chinook during recovery efforts. Scale samples and sex and fork length data were collected for all sampled Chinook. Tissue samples and otoliths were collected from every 100th Chinook. Analysis of the length-frequency distribution for randomly sampled fall-run Chinook males indicates that the cutoff point between grilse and adults occurred at < 50 cm fork length (Figure 3). Randomly sampled male Chinook ranged in size from 40 cm to 95 cm fork length, and randomly sampled female Chinook ranged from 53 cm to 85 cm fork length. During the 2007 spawning season, KRP staff estimated through length frequency analysis that 154 (0.9%) of the run were grilse. .Females accounted for 60.9% (10,447) of the run while males accounted for 39.1% (6,702). The 2007 fall Chinook return to IGH represented roughly 13% of the total (Klamath basin) in-river run and 18% of the total spawner escapement (Table 6). Based on coded wire tag expansion, KRP staff estimated that 15,811 (92%) of the Chinook entering IGH during the 2007 season were of hatchery origin. A total of 779 coho salmon (Oncorhynchus kisutch) entered IGH during the 2007-08 spawning season. The recorded dates for the coho salmon run were from October 15, 2007 to December 17, 2007. KRP staff collected biological data (sex, fork length, presence of marks or clips and scale samples) on 100% of the coho salmon returning to IGH. Males ranged in size from 35 to 80 cm. fork length (Figure 6), while female coho salmon ranged in size from 44 to 76 cm. fork length (Figure 7). IGH counts for the 2007-08 coho spawning season included 325 adult females, 300 adult males, and 154 grilse. IGH staff counted 643 with left maxillary clips, 6 with right maxillary clips, 2 with adipose clips, and 1 with both an adipose and left maxillary clip among these 779 coho salmon. A total of 125 unmarked coho salmon were caudal clipped, floy tagged and released from IGH to the Klamath River. Two of the unmarked coho salmon were not floy tagged. Of the floy tagged coho salmon, 7 reentered IGH and were returned to the river, 4 were observed in nearby Bogus Creek, and 5 were recovered from carcasses washed back on the Shasta River weir. 2 floy-tagged, caudal-clipped coho salmon were observed passing the video fish counting station on the Shasta River. No floy tagged coho were reported for the mainstem Klamath River. None of the 7 unmarked coho salmon that returned to IGH after their initial tagging reentered the hatchery on more than one occasion. No coded wire tags were recovered from coho salmon entering Iron Gate Hatchery during the 2007-08 season.

Iron Gate Hatchery - 2006 annual report: Recovery of Fall-run Chinook and coho salmon at Iron Gate Hatchery

Sun, 16 Apr 2023 11:26:30 -0700

Iron Gate Hatchery (Klamath River) salmon recovery - In 2006, fall-run Chinook salmon (Oncorhynchus tshawytscha) began entering Iron Gate Hatchery (IGH) on 9/22/06. A total of 13,990 Chinook salmon entered IGH during the fall 2006 spawning season. Klamath River Project (KRP) staff systematically sampled 1 in every 10 Chinook recovered at IGH. In addition, staff sampled 100% of spawned Chinook (7,349) and all adipose-clipped Chinook during recovery efforts. Scale samples, sex and fork length data were collected for all sampled Chinook. Analysis of the length-frequency distribution for randomly sampled fall-run Chinook males indicates that the cutoff point between grilse and adults occurred at < 58 cm fork length (Figure 3). Randomly sampled male Chinook ranged in size from 39 cm. to 102 cm. fork length, and randomly sampled female Chinook ranged from 51 cm. to 92 cm. fork length. During the 2006 spawning season , KRP staff estimated that 2,350 (16.8%) of the run were grilse according to length frequency analysis (17.0% according to scale analysis by the KRTAT). Females accounted for 44% (6155) of the run while males accounted for 56% (7,835). The last Chinook of the 2006 spawning season was observed on 11/15/06. The 2006 run total contributed roughly 16% to the total (Klamath basin) in-river run and 20% to the total spawner escapement (Table 6). Based on coded wire tag expansion, KRP staff estimated that 11,116 (79%) of the Chinook entering IGH during the 2006 season were of hatchery origin 332 coho salmon (Oncorhynchus kisutch) entered IGH during the 2006-07 spawning season. The recorded dates for the coho run were from October 20 to December 4, 2006. KRP staff collected biological data (sex, fork length, presence of marks or clips and scale samples) on 301coho, approximately 90% of the run. Males ranged in size from 31 to 83 cm. fork length (Figure 6), while female coho ranged in size from 55 to 79 cm. fork length (Figure 7). IGH counts for the 2006-07 coho spawning season included 151 adult females, 112 adult males, and 69 grilse. IGH staff counted 109 coho with left maxillary clips, 2 with right maxillary clips and 16 with an adipose clip among these 332 coho. . A total of 53 unmarked coho salmon were caudal clipped, Floy tagged and released from IGH to the Klamath River. Of these, 14 coho reentered IGH and were returned to the river, 3 were observed in nearby Bogus Creek, and 2 were observed passing the video fish counting station on the Shasta River. No Floy tagged coho were reported for the mainstem Klamath River. Three of the 14 unmarked coho that returned to IGH after their initial tagging reentered the hatchery on more than one occasion (Table 5). Two coded wire tags were recovered from coho, one from Cole Rivers Hatchery in Oregon and one from Klickitat Hatchery in Washington. Both CWT coho were from Brood Year 2003.

Iron Gate Hatchery - 2005 annual report

Sun, 16 Apr 2023 11:26:28 -0700

Iron Gate Hatchery (Klamath River) salmon recovery - n 2005, fall-run Chinook salmon (Oncorhynchus tshawytscha) began entering IGH on September 11. A total of 13,997 Chinook salmon entered IGH during the fall 2005 spawning season. Of these, Klamath River Project (KRP) staff collected scale samples, determined sex, and measured fork lengths for 2,128 Chinook salmon and recovered heads from 892 ad-clipped Chinook salmon. Analysis of the length-frequency distribution for randomly sampled fall-run Chinook males indicates that the cutoff point between grilse and adults occurred at 50 cm (Figure 3). During the 2005 spawning season 0.3% (42) of the run were grilse, according to length-frequency analysis. This is the lowest percentage of grilse observed since the beginning of the KRP (1978) (Figure 9). The average during this period is 9.5%. Females accounted for 50.4% (7,056) of the run while males accounted for 49.6% (6,941). The last Chinook of the 2005 spawning season was observed on December 5, 2005. The 2005 run (13,997) of fall-run Chinook salmon recovered at IGH was close to the average for the period 1978-2005 (16,282). The 2005 IGH Chinook run total (13,997) contributed roughly 21% to the total (Klamath basin) in-river run and 25% to the total spawner escapement (Table 6). KRP staff also collected biological data for coho salmon (Oncorhynchus kisutch) (sex, fork length, presence of marks or clips and scale samples) during the 2005-06 coho spawning season. Biological data was collected on 466 coho, which was approximately one third of the coho which entered IGH (1,425). Males ranged in size from 38 to 102 cm (Figure 6), while female coho ranged in size from 44 to 78 cm (Figure 7). Iron Gate Hatchery counts for the 2005-06 coho spawning season included 799 adult females, 596 adult males, and 30 grilse. IGH staff counted 1,282 coho with left maxillary clips, 2 with right maxillary clips and 1 with an adipose clip among these 1,425 coho. The recorded dates for the coho run were from October 19 to December 28, 2005. A total of 124 unmarked coho salmon were Floy tagged and released from IGH to the Klamath River. Of these, 39 coho reentered IGH and were returned to the river, 10 coho were observed in nearby Bogus Creek, and 3 unmarked coho were observed passing the video fish counting station on the Shasta River. No Floy tagged coho were reported for the mainstem Klamath River. Eleven of the 39 unmarked coho that returned to IGH after their initial tagging reentered the hatchery on more than one occasion (Table 5). Two of the coho that were eventually recovered in Bogus Creek had previously reentered IGH on multiple occasions.

Iron Gate Hatchery - 2004 annual report

Sun, 16 Apr 2023 11:26:27 -0700

Iron Gate Hatchery (Klamath River) salmon recovery - Iron Gate Hatchery salmonid returns, 2004

Iron Gate Hatchery - 2003 annual report

Sun, 16 Apr 2023 11:26:25 -0700

Iron Gate Hatchery (Klamath River) salmon recovery - The California Department of Fish and Game’s (CDFG), Klamath River Project (KRP) conducts random sampling of fall-run Chinook salmon (Oncorhynchus tshawytscha) annually, during the Chinook spawning season. The purpose of the sampling is to determine the abundance of adult fall-run Chinook salmon entering Iron Gate Hatchery (IGH), to characterize the run in terms of age and sex composition, and to recover all coded wire tags (from random and non-random fish) from adipose fin clipped (ad-clipped) Chinook. Fall-run Chinook salmon began entering IGH on September 15, 2003. A total of 32,260 Chinook salmon returned to IGH during the fall 2003 spawning season. Of these, KRP staff collected scale samples, determined sex, and measured fork lengths for 4,483 Chinook salmon (approximately twice the previous year’s effort: 2,419 samples) and recovered heads from 1,532 ad-clipped salmon. Analysis of the length-frequency distribution for randomly sampled fall-run Chinook males indicates that the cutoff point between grilse and adults occurred at 55 cm (Fig. 2). During the 2003 spawning season 0.9% (290) of the run were grilse (according to scale analysis; length-frequency analysis yielded approximately 1.1% grilse), compared to 2001 and 2002 where 3.5% and 5.2% of the run were grilse, respectively. Females accounted for 51.3% (16,563 fish) of the run while males accounted for 48.7% (15,697 fish). The last Chinook of the 2003 spawning season was observed on December 3, 2003. The 2003 run (32,260) of fall-run Chinook salmon recovered at IGH was the third largest run recorded at IGH in the last 26 years (Fig. 5), since the beginning of the Klamath River Project, surpassed only by 2000 (72,474) and 2001 (38,568). Although 2003 ranked 3rd highest for total IGH run numbers, percent contributions to total (Klamath basin) in-river run and total spawner escapement were only 9th highest and 11th highest, respectively (Table 4). Due to budget constraints, biological data for coho salmon (sex, fork length, presence of marks or clips and scale samples) were not collected by staff of the KRP during the 2003-04 season. Prior to budget cuts, staff of the KRP collected biological data for a large portion of the coho which entered IGH. Results from the 2002-03 coho spawning season sampling are detailed in the 2002-03 KRP Iron Gate Recovery Report. Results from the Iron Gate Hatchery counts for the 2003-04 coho spawning season are included. The recorded dates for the coho run were from October 17 to December 31, 2003.

Iron Gate Hatchery - 2002 annual report

Sun, 16 Apr 2023 11:26:23 -0700

Iron Gate Hatchery (Klamath River) salmon recovery - The annual reporting of recovery efforts by the Klamath River Project of Chinook and coho salmon recovery at Iron Gate Hatchery.

Chinook and Coho Salmon and fall-run steelhead run-size estimates using mark-recapture methods, 2019-20 season. Annual report.

Thu, 23 Feb 2023 15:06:45 -0800

Salmon and steelhead monitoring in the Trinity River basin, 2019-20 season - California Department of Fish and Wildlife's Trinity River Project conducted tagging and recapture operations from July 2019 through March 2020 to produce run-size, angler harvest, and spawner escapement estimates of spring and fall Chinook Salmon (Oncorhynchus tshawytscha), Coho Salmon (O. kisutch), and fall-run steelhead (O. mykiss) in the Trinity River basin. Monitoring results inform the Trinity River Restoration Program’s adaptive management decision making process and help evaluate progress toward achieving fundamental objectives outlined in the Integrated Assessment Plan (TRRP 2009). Additionally, run-size estimates are used in annual fishery management decisions, feeding into the Pacific Fishery Management Council’s Klamath River basin fishery regulation and harvest allocation process. Using a Petersen mark-recapture methodology, we estimated 12,612 (95% CI 10,976 – 14,596) spring Chinook Salmon migrated into Trinity River basin upstream of Junction City weir. The run was comprised of an estimated 246 jacks [185 natural-origin (NOR) and 61 hatchery origin (HOR)] and 12,366 adults (3,061 NOR and 9,305 HOR). Using tags returned by anglers we estimate 17 jack and 612 adult spring Chinook were harvested, yielding a total escapement of 11,983 fish, including 4,478 spring Chinook that entered Trinity River Hatchery and 7,505 estimated natural area spawners. Escapement of 2,449 NOR adult spring Chinook Salmon is 40.8% of the TRRP goal of 6,000. An estimated 11,910 (95% CI 10,421 – 13,509) fall Chinook Salmon migrated upstream of Willow Creek weir in 2019. The run consisted of an estimated 7,963 (3,564 NOR and 4,399 HOR) adult and 3,947 jack (3,323 NOR and 624 HOR) fall Chinook Salmon. Using tags returned by anglers we estimate 98 jack and 241 adult fall Chinook Salmon were harvested, yielding an escapement of 11,571, including 1,586 that entered Trinity River Hatchery and 9,984 estimated natural area spawners. Escapement of 3,457 NOR adult fall Chinook Salmon is 5.6% of the 62,000 fish Trinity River Restoration Program goal. Both Coho Salmon run-size and escapement in the Trinity River upstream of Willow Creek weir were estimated at 1,074 (95% CI 881 – 1,288), as no Coho Salmon were reported as harvested. The escapement consisted of 10 jack (5 NOR and 5 HOR) and 1,064 adults (104 NOR and 960 HOR). Escapement of 104 NOR Coho Salmon adults was 7.4% of the Trinity River Restoration Program goal of 1,400 fish. Using a Petersen mark-recapture methodology we estimated 4,547 (95% CI 3,516 – 6,082) adult fall steelhead returned to the Trinity River basin upstream of Willow Creek weir. Anglers harvested an estimated 30 adult fall steelhead upstream of the weir, leaving 4,518 (3,459 NOR and 1,059 HOR) fish as potential spawners. Escapement of 3,459 NOR adult steelhead is 8.6% of the 40,000 fish Trinity River Restoration Program goal.

Chinook Salmon, Coho Salmon and fall-run steelhead run-size estimates using mark-recapture methods, 2021-22 season. Final annual report.

Thu, 23 Feb 2023 14:57:56 -0800

Salmon and steelhead monitoring in the Trinity River basin, 2021-22 season - Using a Petersen mark-recapture methodology, we estimated 5,550 (95% CI 5,061 – 6,065) spring Chinook Salmon migrated into Trinity River basin upstream of Junction City weir. The run was comprised of an estimated 778 jacks (334 natural-origin [NOR] and 444 hatchery origin [HOR]) and 4,772 adults (691 NOR and 4,082 HOR). Using tags returned by anglers we estimate harvest of 0 jack and 147 adult spring Chinook, yielding a total escapement of 5,403 fish, including 2,005 spring Chinook that entered Trinity River Hatchery and 3,398 estimated natural area spawners. Escapement of 669 NOR adult spring Chinook Salmon is 11.2% of the Trinity River Restoration Program goal of 6,000. An estimated 22,623 (95% CI 21,157 – 24,142) fall Chinook Salmon migrated upstream of Willow Creek weir in 2021. The run consisted of an estimated 3,390 jacks (2,761 NOR and 629 HOR) and 19,233 adults (5,673 NOR and 13,560 HOR). Using tags returned by anglers we estimate harvest of 47 jack and 600 adult fall Chinook Salmon, yielding an escapement of 21,976, including 5,967 that entered Trinity River Hatchery and 16,009 estimated natural area spawners. Escapement of 5,496 NOR adult fall Chinook Salmon is 8.9% of the 62,000 fish Trinity River Restoration Program goal. Coho Salmon run-size and escapement in the Trinity River upstream of Willow Creek weir were both estimated at 4,694 (95% CI 3,850 – 5,791), as no Coho Salmon were reported as harvested. The escapement consisted of 323 jack (12 NOR and 311 HOR) and 4,371 adults (209 NOR and 4,161 HOR). Escapement of 209 NOR Coho Salmon adults was 14.9% of the Trinity River Restoration Program goal of 1,400 fish. Coho Salmon run-size and escapement in the Trinity River upstream of Junction City weir were both estimated at 4,071 (95% CI 3,538 – 4,642), with no Coho Salmon reported as harvested. The escapement consisted of 246 jack (1 NOR and 245 HOR) and 3,825 adults (214 NOR and 3,611 HOR). An additional 36 adult Coho (15 NOR and 21 HOR) were removed from the river at Junction City weir and trucked to Trinity River Hatchery as part of a pilot broodstock collection project to implement the hatchery’s genetic management plan (CDFW 2017).2 Using a Petersen mark-recapture methodology we estimated 7,029 (95% CI 5,535 – 9,176) adult fall steelhead returned to the Trinity River basin upstream of Willow Creek weir. Anglers harvested an estimated 190 adult fall steelhead upstream of the weir, leaving 6,839 (3,088 NOR and 3,940 HOR) fish as potential spawners. Escapement of 3,088 NOR adult steelhead is 7.7% of the 40,000 fish Trinity River Restoration Program goal.

Chinook Salmon, Coho Salmon and fall-run steelhead run-size estimates using mark-recapture methods, 2020-21 season.

Tue, 01 Mar 2022 13:04:58 -0800

Salmon and steelhead monitoring in the Trinity River basin, 2020 season - California Department of Fish and Wildlife's Trinity River Project conducted tagging and recapture operations from June 2020 through March 2021 to produce run-size, angler harvest, and spawner escapement estimates of spring and fall Chinook Salmon (Oncorhynchus tshawytscha), Coho Salmon (O. kisutch), and fall-run steelhead (O. mykiss) in the Trinity River basin. Monitoring results inform the Trinity River Restoration Program’s adaptive management decision making process and help evaluate progress toward achieving fundamental objectives outlined in the Integrated Assessment Plan (TRRP 2009). Additionally, run-size estimates are used in annual fishery management decisions, feeding into the Pacific Fishery Management Council’s Klamath River basin fishery regulation and harvest allocation process.

2021/22 CDFW Trinity River trapping summary

Mon, 28 Feb 2022 10:33:26 -0800

Trapping summary results, Trinity River, 2021-22 field season - In-season, preliminary weekly trapping results, by Julian week, at CADFW weirs (Junction City and Willow Creek) and Trinity River Hatchery.

Shasta River Salmonid Monitoring 2017, Siskiyou County, CA

Thu, 24 Oct 2019 12:57:13 -0700

Klamath Basin salmonid monitoring, Shasta River - A total of 9,905 fall run Chinook Salmon (Oncorhynchus tshawytscha) were estimated to have entered the Shasta River during the 2017 spawning season. An underwater video camera was operated in the flume of the Shasta River Fish Counting Facility (SRFCF) twenty four hours a day, seven days a week, from September 6th, 2017 until January 10, 2018. The first Chinook was observed on September 6, 2017 and the last Chinook on January 10, 2018. KRP staff also processed a total of 82 Chinook carcasses during spawning ground surveys, and 174 Chinook carcasses as wash backs against the SRFCF weir (a systematic 1:5 sample). A total of 1,022 carcasses (940 washback carcasses and 82 spawning ground carcasses) were examined for adipose fin clips in 2017. Chinook carcasses sampled in the spawning ground surveys were used to describe characteristics of the run. Carcasses ranged in fork length (FL) from 40 cm. to 90 cm. and grilse were determined to be < 58 cm. in FL. Males ranged in FL from 40 cm. to 90 cm. and averaged 56.1 cm. Females ranged in FL from 43 cm. to 76 cm. and averaged 65.2 cm. The run was comprised of 6,618 grilse (66.8%), and 3,287 adults (33.2%). The sex composition of the run, based on 81 fish sampled (one fish was removed because no sex was recorded), was 26% (2,575) female and 74% (7,330) male. A total of 3 AD Chinook were recovered in the weir wash back sample. All three AD carcasses contained a coded wire tag (CWT) from Iron Gate Hatchery (IGH), the fish were 2, 3, and 4 years old. Hatchery composition was estimated using expansion of the known CWT proportions and carcasses handled during the spawning ground surveys and weir wash backs. For 2017, the expanded CWT estimate was 117 fish or 1.17% of the run. A net total of 41 Coho Salmon (Coho, Oncorhynchus kisutch) were estimated to have entered the Shasta River prior to removal of the weir on January 10, 2018. The first Coho of the season was observed swimming upstream through the SRFCF on October 29, 2017 and the last Coho was observed swimming upstream through the SRFCF on January 9, 2018. No Coho carcasses were recovered in the spawning ground surveys or washback samples. Due to the lack of Coho carcass recovery, hatchery contribution was not calculated for the 2017 Shasta River Coho run. A net total of 261 adult steelhead trout (Oncorhynchus mykiss) were observed passing through the SRFCF during the 2017 season, prior to the removal of the SRFCF on January 10, 2018.

Shasta River Chinook and Coho Salmon observations in 2018, Siskiyou County, CA

Thu, 24 Oct 2019 12:53:40 -0700

Klamath Basin salmonid monitoring, Shasta River - A total of 20,692 fall run Chinook Salmon (Oncorhynchus tshawytscha) were estimated to have entered the Shasta River during the 2018 spawning season. An underwater video camera was operated in the flume of the Shasta River Fish Counting Facility (SRFCF) 24 hours a day, seven days a week, from September 4, 2018, until January 8, 2019. The first Chinook was observed on September 4, 2018, and the last Chinook on January 6, 2019. Klamath River Project staff sampled 617 carcasses to collect biological metrics and to determine the presence of Iron Gate Hatchery (IGH) produced fish. Chinook Salmon carcasses sampled in the spawning ground surveys were used to describe characteristics of the run. We processed 617 carcasses which ranged in fork length (FL) from 44 cm to 86 cm Grilse were determined to be < 56 cm in FL. Males ranged in FL from 46 cm to 86 cm and averaged 67.7 cm. Females ranged in FL from 44 cm to 77 cm and averaged 64.3 cm. The run was comprised of 2,017 grilse (9.75%), and 18,675 adults (90.25%). The sex composition of the run, based on 208 spawning ground survey (SGS) fish sampled, was 61.5% (12,734) female and 38.5% (7,958) male. A total of 14 adipose-clipped (AD) Chinook were recovered in the weir washback sample. All 14 AD carcasses contained a coded wire tag (CWT) from IGH, the fish were 2 and 3 years old. Hatchery composition was estimated using expansion of the known CWT proportions and carcasses handled during the spawning ground surveys and weir washbacks. For 2018, the expanded CWT estimate was 1,883 fish or 9.1% of the run. A net total of 39 Coho Salmon (Oncorhynchus kisutch) were estimated to have entered the Shasta River prior to removal of the weir on January 8, 2019. The first Coho of the season was observed swimming upstream through the SRFCF on November 7, 2018, and the last Coho was observed swimming upstream through the SRFCF on December 27, 2018. No Coho carcasses were recovered in the spawning ground surveys or washback samples. Due to the lack of Coho carcass recovery, hatchery contribution was not calculated for the 2018 Shasta River Coho run. A net total of 392 adult steelhead trout (Oncorhynchus mykiss) were observed passing through the SRFCF during the 2018 season, prior to the removal of the SRFCF on January 8, 2019.

2018 Scott River Salmon Studies - Final Report

Thu, 24 Oct 2019 12:47:17 -0700

Salmon run monitoring on Scott River (Klamath Basin), CA - The California Department of Fish and Wildlife’s (Department), Klamath River Project (KRP) operated a video fish counting facility and conducted cooperative spawning ground surveys (carcass surveys) on the Scott River during the 2018 fall-run Chinook Salmon (Oncorhynchus tshawytscha) and Coho Salmon (Oncorhynchus kisutch) spawning season. The purpose of these surveys is to describe the run characteristics of adult Chinook and Coho into the Scott River. Fish counting operations began on October 3, 2018, and ended on December 20, 2018, due to high river flows. The total number of Chinook Salmon that entered the Scott River during the 2018 season is estimated to be 1,279 fish. Based on the proportion of male and female Chinook that were sampled during the spawning ground surveys, the run was comprised of approximately 443 (34.6%) males and 836 (65.4%) females. Based on scale age analysis, adults comprised approximately 94.4% (1,208 fish) and grilse comprised 5.6% (71 fish) of the run. Males ranged in fork length (FL) from 43 cm to 99 cm and averaged 71.3 cm. Females ranged in FL from 47 cm to 78 cm and averaged 64.9 cm. KRP staff estimated that none of the Chinook that returned were of hatchery origin. The first adult Coho Salmon was observed at the Scott River Fish Counting Facility (SRFCF) on November 23, 2018, and the last Coho was observed on December 18, 2018. A net total of 737 Coho were observed moving upstream through the SRFCF during the season. Two additional Coho were estimated in the main stem or tributaries downstream of the SRFCF yielding a season total of 739 Coho. Based on the proportion of male and female Coho that were sampled during the season, the run was comprised of approximately 317 (42.9%) males and 422 (57.1%) females. Based on live Coho images observed during video monitoring, adults comprised approximately 96.4% and grilse comprised 3.6% of the run. Males ranged in FL from 64 cm to 69 cm and averaged 66.3 cm. Females ranged in FL from 60 cm to 66 cm and averaged 63.3 cm. Based on observed hatchery marks during video monitoring, none of the Coho were estimated to be of hatchery origin.

South Fork Trinity River 2015 Summer Temperature Report

Thu, 24 Oct 2019 12:29:03 -0700

South Fork Trinity River summer temperature - The South Fork Trinity River is the largest tributary to the Trinity River above the confluence with the Klamath River. It’s California’s longest undammed river and has historically had the greatest numbers of Chinook in all of the Trinity River tributaries (LaFaunce 1967). Drought conditions, which have persisted for four years, have caused Departmental concerns for the status of Spring Chinook salmon in the South Fork Trinity River. Low flows and increased temperatures are a serious risk to this unique population which is already at low threshold population levels. A summer temperature profile of the river could help explain why certain species of fish distribute themselves in the river during the summer months when the water is the lowest and temperature stress the highest due. It could also assist in the management of spring Chinook by locating cold water refugia, determine spawning distribution, and determine critical areas or time frames for protection. Fifteen Hobo temperature probes were deployed in the South Fork Trinity River beginning in June 2015. Additionally one probe was deployed in Forest Glenn in the shade of large tree above the river to monitor air temperature. Probes were set to record temperature every 30 minutes. Retrieval of the temperature probes began at the end of September and continued into November.

2017 Scott River Salmon Studies - Final Report

Thu, 24 Oct 2019 12:21:31 -0700

Salmon run monitoring on Scott River (Klamath Basin), CA - The California Department of Fish and Wildlife’s (Department), Klamath River Project (KRP) operated a video/SONAR fish counting facility and conducted cooperative spawning ground surveys (carcass surveys) on the Scott River during the 2017 fall-run Chinook Salmon (Chinook, Oncorhynchus tshawytscha) and Coho Salmon (Oncorhynchus kisutch) spawning season. The purpose of these surveys is to describe the run characteristics of adult Chinook Salmon and Coho Salmon into the Scott River. Fish counting operations began on September 22, 2017 and ended on January 8, 2018 due to high river flows. The total number of Chinook Salmon that entered the Scott River during the 2017 season is estimated to be 2,576 fish. Based on the proportion of male and female Chinook Salmon that were sampled during the spawning ground surveys the run was comprised of approximately 1,194 (46.4%) males and 1,382 (53.4%) females. Based on scale age analysis, adults comprised approximately 88.1% (2,269 fish) and grilse comprised 11.9% (307 fish) of the run. Males ranged in fork length (FL) from 38cm to 100cm and averaged 69.3cm. Females ranged in FL from 47cm to 88cm and averaged 68.5cm. KRP staff estimated that none of the Chinook Salmon that returned were of hatchery origin. The first adult Coho Salmon was observed at the Scott River Fish Counting Facility (SRFCF) on October 24, 2017 and the last Coho Salmon was observed on January 4, 2018. A net total of 382 Coho Salmon were observed moving upstream through the SRFCF during the season. No additional coho were estimated in the main stem or tributaries downstream of the SRFCF. Based on the proportion of male and female Coho Salmon that were sampled during the season the run was comprised of approximately 208 (54.5%) males and 174 (45.5%) females. Based on live coho images observed during video monitoring, adults comprised approximately 96.3% (368 fish) and grilse comprised 3.7% (14 fish) of the run. Males ranged in fork length (FL) from 55cm to 69cm and averaged 62.8cm. Females ranged in FL from 57cm to 65cm and averaged 60.0cm. Based on observed hatchery marks during video monitoring, 1.08% of the Coho Salmon were estimated to be of hatchery origin.

2016 Scott River Salmon Studies - Final Report

Thu, 24 Oct 2019 12:17:51 -0700

Salmon run monitoring on Scott River (Klamath Basin), CA - The California Department of Fish and Wildlife’s (Department) Klamath River Project (KRP) operated a video/SONAR fish counting facility and conducted cooperative spawning ground surveys (carcass surveys) on the Scott River during the 2016 fall-run Chinook Salmon (Chinook, Oncorhynchus tshawytscha) and Coho Salmon (Coho, Oncorhynchus kisutch) spawning season. The purpose of these surveys is to describe the run characteristics of adult Chinook Salmon and Coho Salmon into the Scott River.

Iron Gate Hatchery - 2018 annual report: Recovery of fall-run Chinook and coho salmon at Iron Gate Hatchery

Thu, 24 Oct 2019 12:09:30 -0700

Iron Gate Hatchery (Klamath River) salmon recovery - A total of 11,860 fall-run Chinook Salmon (Oncorhynchus tshawytscha) entered Iron Gate Hatchery (IGH) during the fall 2018 spawning season from October 8, 2018 through November 30, 2018. Klamath River Project (KRP) staff systematically sampled 1 in every 10 Chinook, as well as all adipose-clipped (AD) Chinook during recovery efforts, for a sample size of 1,154, two scale samples were lost so 1,152 scale samples were collected. Scale samples, sex and fork length (FL) data were collected from systematically sampled Chinook. Analysis of the length-frequency distribution for systematically sampled Chinook males indicates that the cutoff point between grilse and adults occurred at <53 cm FL. Systematically sampled male Chinook ranged in size from 40 to 90 cm FL, and systematically sampled female Chinook ranged from 50 to 80 cm FL. Based on scale age analysis, the Klamath River Technical Team (KRTT) estimated that 3.67% (435) of the run were grilse. Females accounted for 56% (6,588) of the run while males accounted for 44% (3,192). Based on coded wire tag expansion, KRP staff estimated that 81% (9,582) of the Chinook entering (IGH) during the 2018 season were of hatchery origin. In 2018, 202 Coho Salmon (Oncorhynchus kisutch) entered IGH during the spawning season. Three right maxillary clipped Coho (Trinity River Hatchery origin) were trapped, marked with an opercle punch and released, this fish returned two more times throughout the trapping season. Taking out the multiple captures of this fish, 200 unique Coho salmon were trapped at IGH. The recorded dates for the Coho run were from October 18, 2018 to December 13, 2018. KRP staff collected biological data (sex, fork length, presence of marks or clips, and tissue samples) on every Coho that entered the hatchery as well as scales from mortalities and Coho used in spawning. Otoliths were collected from all unmarked Coho used for spawning or recovered as mortalities. Males ranged in size from 34 to 73 cm FL, and the average FL was 53 cm. Males represented 63% (126) of the run. Females ranged in size from 37 to 74 cm FL and the average FL was 64 cm. Females represented 37% (74) of the run. Based on the length frequency distribution of 62 male Coho, grilse were estimated to be <53 cm FL. Using this grilse cutoff, the age composition of the 2018 IGH male Coho run was 48% (61) grilse and 52% (65) adults. Of the Coho that entered IGH during 2018, 85% (170) had left maxillary clips, 1.5% (3) had right maxillary clips, and 13.5% (27) had no clips. The 2018 Coho spawning season was the ninth in which Coho were spawned at IGH using a spawning matrix provided by the National Oceanic and Atmospheric Administration. The purpose of the matrix is to estimate relatedness indices so that closely related individuals are not paired for spawning.

Iron Gate Hatchery - 2017 annual report: Recovery of fall-run Chinook and coho salmon at Iron Gate Hatchery

Thu, 24 Oct 2019 12:06:26 -0700

Recovery of fall-run Chinook and coho salmon at Iron Gate Hatchery - A total of 10,636 fall-run Chinook Salmon, (Chinook, Oncorhynchus tshawytscha), entered Iron Gate Hatchery (IGH) during the fall 2017 spawning season from October 9, 2017 through November 27, 2017. Klamath River Project (KRP) staff systematically sampled 1 in every 5 Chinook, as well as all adiposeclipped (AD) Chinook during recovery efforts, for a sample size of 3,604. Scale samples and sex and fork length data were collected from systematically sampled Chinook. Analysis of the length-frequency distribution for systematically sampled Chinook males indicates that the cutoff point between grilse and adults occurred at <57 cm fork length (FL). Systematically sampled male Chinook ranged in size from 39 to 90 cm FL, and systematically sampled female Chinook ranged from 45 to 84 cm FL. Based on scale age analysis, the Klamath River Technical Team (KRTT) estimated that 30.0% (3,193) of the run were grilse. Females accounted for 41.1% (4,370) of the run while males accounted for 58.9% (6,266). Based on coded wire tag expansion, KRP staff estimated that 74% (7,914) of the Chinook entering IGH during the 2017 season were of hatchery origin. In 2017 , 121 Coho Salmon (Coho, Oncorhynchus kisutch) entered IGH during the spawning season and one Coho was trapped at Bogus Creek for a total of 122 Coho. The recorded dates for the Coho run were from October 25th 2017 to January 5th 2018. KRP staff collected biological data (sex, fork length, presence of marks or clips, and tissue samples) on every Coho that entered the hatchery as well as scales from mortalities and Coho used in spawning. Otoliths were collected from all unmarked Coho used for spawning or recovered as mortalities. Males ranged in size from 36 to 78 cm FL (mean FL 53 cm) and represented 51% (62) of the run, while females ranged in size from 53 to 72 cm fork length (mean FL 65 cm) and represented 49% (60) of the run. Based on the length frequency distribution of 62 male Coho, grilse were estimated to be <50 cm FL. Using this grilse cutoff, the age composition of the 2017 IGH male Coho run was 47% (29) grilse and 53% (33) adults. Of the Coho that entered IGH during 2017, 80% (98) had left maxillary clips and 20% (24) had no clips. No AD or right maxillary clipped Coho were recovered at IGH in 2017. The 2017 Coho spawning season was the eighth in which Coho were spawned at IGH using a spawning matrix provided weekly by the National Oceanic and Atmospheric Administration.

Iron Gate Hatchery - 2016 annual report: Recovery of fall-run Chinook and Coho Salmon at Iron Gate Hatchery

Thu, 24 Oct 2019 11:32:00 -0700

Recovery of fall-run Chinook and coho salmon at Iron Gate Hatchery - A total of 2,587 fall-run Chinook Salmon, (Chinook, Oncorhynchus tshawytscha), entered Iron Gate Hatchery (IGH) during the fall 2016 spawning season from October 10, 2016 through November 21, 2016. Klamath River Project (KRP) staff systematically sampled 1 in every 10 Chinook, as well as all adipose-clipped (AD) Chinook during recovery efforts, for a sample size of 749. Scale samples and sex and fork length data were collected from systematically sampled Chinook. Analysis of the lengthfrequency distribution for systematically sampled Chinook males indicates that the cutoff point between grilse and adults occurred at <55 cm fork length (FL). Systematically sampled male Chinook ranged in size from 44 to 96 cm FL, and systematically sampled female Chinook ranged from 52 to 87 cm FL. Based on scale age analysis, the Klamath River Technical Team (KRTT) estimated that 5.8% (151) of the run were grilse. Females accounted for 47.9% (1,239) of the run while males accounted for 52.1% (1348). The 2016 Chinook return to IGH contributed roughly 9.5% to the total (Klamath basin) in-river run of 27,353 and 12.9% to the total spawner escapement of 19,948. Based on coded wire tag expansion, KRP staff estimated that 82% (2,129) of the Chinook entering IGH during the 2016 season were of hatchery origin. A total of 86 Coho Salmon (Coho, Oncorhynchus kisutch ) entered IGH during the 2016 spawning season. The recorded dates for the Coho run were from November 1, 2016 to December 1, 2016. KRP staff collected biological data (sex, fork length, presence of marks or clips, scale samples, and tissue samples) on every Coho that entered the hatchery as well as scales from mortalities and Coho used in spawning. Otoliths were collected from the first left maxillary-clipped Coho used in spawning or recovered as amortality on each processing day. Otoliths were collected from all unmarked Coho used for spawning or recovered as mortalities. Males ranged in size from 31 to 70 cm FL (mean FL 55 cm) and represented 70% (60) of the run, while females ranged in size from 58 to 71 cm fork length (mean FL 64 cm) and represented 30% (26) of the run. Based on the length frequency distribution of 60 male Coho, grilse were estimated to be <52 cm FL. Using this grilse cutoff, the age composition of the 2016 IGH Coho run was 35% (30) grilse and 65% (56) adult Coho. The proportion of grilse among males was 50%. Of the Coho that entered IGH during 2016, 77% (66) had left maxillary clips and 23% (20) had no clips. No AD or right maxillary clipped Coho were recovered at IGH in 2016. The 2016 Coho spawning season was the seventh in which Coho were spawned at IGH using a spawning matrix provided weekly by the National Oceanic and Atmospheric Administration.

Bogus Creek salmon studies 2015 - Final report

Thu, 24 Oct 2019 11:17:07 -0700

Results of salmon monitoring on Bogus Creek (Klamath Basin), CA - CDFW's Klamath River Project operated a video fish counting facility and conducted spawning ground (carcass) suryeys on Bogus Creek during the Chinook salmon and Coho salmon spawning season.

Bogus Creek salmon studies 2017 - Final report

Thu, 24 Oct 2019 11:09:04 -0700

Results of salmonid monitoring on Bogus Creek (Klamath Basin), CA - CDFW's Klamath River Project operated a video fish counting facility and conducted spawning ground surveys (carcass surveys) on Bogus Creek during the Chinook salmon and coho salmon spawning season.

Bogus Creek salmon studies 2016 - Final report

Thu, 24 Oct 2019 11:03:26 -0700

Results of salmon monitoring on Bogus Creek (Klamath Basin), CA - The California Department of Fish and Wildlife’s (Department), Klamath River Project (KRP) operated a video fish counting facility on Bogus Creek during the Chinook Salmon (Oncorhynchus tshawytscha). Coho Salmon (Oncorhynchus kisutch) and Steelhead trout (Oncorhynchus mykiss) spawning season.

2017-18 ANNUAL REPORT - TRINITY RIVER BASIN SALMON AND STEELHEAD MONITORING PROJECT: CHINOOK AND COHO SALMON AND FALL-RUN STEELHEAD RUN-SIZE ESTIMATES USING MARK-RECAPTURE METHODS

Wed, 25 Sep 2019 10:07:32 -0700

Trinity River CA salmon and steelhead monitoring - California Department of Fish and Wildlife's Trinity River Project conducted tagging and recapture operations from July 2017 through March 2018 to produce run-size, angler harvest, and spawner escapement estimates of spring- and fall-run Chinook Salmon (Oncorhynchus tshawytscha), Coho Salmon (O. kisutch), and fall-run steelhead (O. mykiss) in the Trinity River basin. Monitoring results inform the Trinity River Restoration Program’s adaptive management decision making process and help evaluate progress toward achieving fundamental objectives outlined in the Integrated Assessment Plan. Additionally, run-size estimates are used in annual fishery management decisions, feeding into the Pacific Fishery Management Council’s Klamath River basin fishery regulation and harvest allocation process.

2018-19 ANNUAL REPORT - TRINITY RIVER BASIN SALMON AND STEELHEAD MONITORING PROJECT: CHINOOK AND COHO SALMON AND FALL-RUN STEELHEAD RUN-SIZE ESTIMATES USING MARK-RECAPTURE METHODS

Wed, 25 Sep 2019 10:02:02 -0700

Trinity River CA salmon and steelhead monitoring - California Department of Fish and Wildlife's Trinity River Project conducted tagging and recapture operations from July 2018 through March 2019 to produce run-size, angler harvest, and spawner escapement estimates of spring- and fall-run Chinook Salmon (Oncorhynchus tshawytscha), Coho Salmon (O. kisutch), and fall-run steelhead (O. mykiss) in the Trinity River basin. Monitoring results inform the Trinity River Restoration Program’s (TRRP) adaptive management decision making process and help evaluate progress toward achieving fundamental objectives outlined in the Integrated Assessment Plan (TRRP 2009). Additionally, run-size estimates are used in annual fishery management decisions, feeding into the Pacific Fishery Management Council’s Klamath River basin fishery regulation and harvest allocation process.

2019 Trinity River Project trapping summary

Wed, 11 Sep 2019 12:40:31 -0700

Trapping summary results, Trinity River, 2019-20 field season - In-season, preliminary weekly trapping results, by Julian week, at CADFW weirs (Junction City and Willow Creek) and Trinity River Hatchery.

Iron Gate Hatchery - 2015 annual report: Recovery of fall-run Chinook and Coho Salmon at Iron Gate Hatchery

Sun, 14 Jan 2018 12:02:21 -0800

Iron Gate Hatchery (Klamath River) salmon recovery - The California Dept of Fish and Wildlife's Klamath River Project conducts systematic sampling of fall-run Chinook and Coho Salmon at Iron Gate Hatchery.

Shasta River Chinook and Coho Salmon observations in 2016, Siskiyou County, CA

Sun, 14 Jan 2018 11:55:06 -0800

Klamath Basin salmonid monitoring, Shasta River - The Klamath River Project (KRP) of the California Department of Fish and Wildlife (Department) is responsible, in cooperation with other state, federal and tribal partners, for estimating the number of Chinook Salmon (Oncorhynchus tshawytscha) and Coho Salmon (Oncorhynchus kisutch) that return to the Klamath River Basin, excluding the Trinity River Basin, each year. In addition to escapement, objectives include the determination of run timing, spawning distribution, length frequency (FL) distribution, and sex ratio for Chinook and Coho Salmon in the Shasta River. Scales and coded wire tags are collected to determine the age composition and hatchery contribution to each annual run.

2016-17 ANNUAL REPORT - TRINITY RIVER BASIN SALMON AND STEELHEAD MONITORING PROJECT: CHINOOK AND COHO SALMON AND FALL-RUN STEELHEAD RUN-SIZE ESTIMATES USING MARK-RECAPTURE METHODS

Tue, 07 Nov 2017 14:35:19 -0800

Trinity River, CA salmon and steelhead monitoring - California Department of Fish and Wildlife's Trinity River Project conducted tagging and recapture operations from July 2016 through March 2017 to produce run-size, angler harvest, and spawner escapement estimates of spring- and fall-run Chinook Salmon (Oncorhynchus tshawytscha), Coho Salmon (O. kisutch), and fall-run steelhead (O. mykiss) in the Trinity River basin. Monitoring results informs the Trinity River Restoration Program’s (TRRP) adaptive management decision making process and help evaluate progress toward achieving fundamental objectives outlined in the Integrated Assessment Plan (TRRP 2009). Additionally, run-size estimates are used in annual fishery management decisions, feeding into the Pacific Fishery Management Council’s Klamath River basin fishery regulation and quota determination process.

2015-16 ANNUAL REPORT - TRINITY RIVER BASIN SALMON AND STEELHEAD MONITORING PROJECT: CHINOOK AND COHO SALMON AND FALL-RUN STEELHEAD RUN-SIZE ESTIMATES USING MARK-RECAPTURE METHODS

Wed, 18 Jan 2017 15:00:01 -0800

Trinity River, CA salmon and steelhead monitoring - California Department of Fish and Wildlife's Trinity River Project conducted tagging and recapture operations from June 2015 through March 2016 to produce run-size, angler harvest, and spawner escapement estimates of spring- and fall-run Chinook salmon (Oncorhynchus tshawytscha)], coho salmon (O. kisutch), and fall steelhead (O. mykiss) in the Trinity River basin. Monitoring results informs the Trinity River Restoration Program’s (TRRP) adaptive management decision making process and helps evaluate progress toward achieving fundamental objectives outlined in the Integrated Assessment Plan (TRRP, 2009) Using a Petersen mark-recapture methodology, we estimated a run-size of 4,408 (95% CI 3,752 – 5,119) spring-run (spring) Chinook migrated into Trinity River basin upstream of Junction City weir (JCW). The run was comprised of an estimated 1,146 naturallyproduced adults and 177 naturally-produced jacks and 2,772 hatchery-produced adults and 313 hatchery-produced jacks. Using tags returned by anglers we estimate 190 spring Chinook were harvested, yielding an escapement of 4,218 fish. Escapement of 1,090 naturally-produced adult spring Chinook was 18.2% of the TRRP goal of 6,000 spring Chinook. An estimated run-size of 10,365 (95% CI 9,230 – 11,569) fall-run (fall) Chinook migrated past Willow Creek weir (WCW). The run was comprised of an estimated 3,609 naturallyproduced adults and 2,226 naturally-produced jack salmon and 4,006 hatcheryproduced adults and 524 hatchery-produced jacks. We estimate 56 fall Chinook were harvested by anglers, yielding a total escapement of 10,309 fish. Escapement of 3,592 naturally-produced adult fall Chinook was 5.8% of the 62,000 fish TRRP goal. Both coho run-size and escapement in the Trinity above Willow Creek were estimated at 4,619 (95% CI 4,169 – 5,094), because no coho were reported as harvested. Coho escapement was comprised of an estimated 748 naturally-produced adult and 65 naturally-produced jack coho and 2,936 hatchery-produced adult and 870 hatcheryproduced jacks. Escapement of 748 naturally-produced coho adults was 53.4% of the TRRP goal of 1,400 fish. An estimated run-size of 11,167 (95% CI 9,962 – 12,445) adult fall steelhead returned to the Trinity River basin upstream of WCW. Anglers harvested an estimated 436 adult fall steelhead above WCW, leaving 10,732 (2,454 naturally-produced and 8,278 hatchery-produced) fish as potential spawners. Escapement of 2,454 naturally produced adult steelhead was 6.1% of the 40,000 fish TRRP goal.

Trinity River tributary summer steelhead and spring Chinook snorkel surveys 1990-2014: Canyon Creek, North Fork Trinity River, South Fork Trinity River, and New River

Fri, 13 Jan 2017 14:21:10 -0800

Trinity River tributary summer steelhead and spring Chinook snorkel surveys 1990-2014. - Snorkel surveys for spring Chinook and summer steelhead were conducted between 1990 and 2014 in the four major tributaries to the Trinity River: Canyon Creek, North Fork Trinity River, South Fork Trinity River, and New River. Our analysis showed that tributaries of the Trinity River continued to have more summer steelhead than spring Chinook for the annual sample period 1990 to 2014. The correlation between number of summer steelhead and year sampled was significant and the trend was relatively strong and positive, which suggests that the “population” of summer steelhead in the Trinity River appears to have increased over time. Numbers of summer steelhead from Trinity River tributaries showed a series of three primary oscillating peaks (1991, 2003, and 2012), whereas numbers of spring Chinook were low but they continue to be observed on an annual basis. The correlation between numbers of Spring Chinook and year was not significant and the trend, although positive, was very weak. Composite numbers of spring Chinook showed only two muted peaks over time (1997 and 2012). Annual variation in combined numbers of grilse exhibited one major peek (2011 and 2012) in abundance and there was a significant positive correlation in numbers over time. The pattern of variation in combined numbers of: (1) adult summer steelhead, (2) adult spring Chinook, and (3) grilse from Trinity River tributaries fluctuated considerably on an annual basis from 1990 to 2014. In Canyon Creek, although correlation analysis showed a significant negative correlation between survey year and numbers of summer steelhead and even through the correlation with year was negative for spring Chinook, it was not significant. Canyon Creek was the only tributary where species annual patterns of abundance were significantly and positively correlated, which suggests that this concordant trend represents declining populations of both species of salmonids in this tributary. For the North Fork Trinity River, even though there appeared to be a slight annual increase in number fish for both summer steelhead and spring Chinook, the trend was not significant for either species. For the South Fork Trinity River numbers of summer steelhead increased significantly between 1990 and 2014; whereas, although numbers of spring Chinook continue to fluctuate, they were not significantly correlated with year. For New River, annual survey results indicated a significant positive correlation between survey year and number of both summer steelhead and spring Chinook. It appears that populations of both salmonids have increased significantly from 1990 to 2014. Fluctuations in annual patterns of abundance were largely not concordant between: (1) species, (2) within adults of each taxon, or (3) among tributaries, which attests further to the variation and uniqueness of environmental conditions associated with these unique tributaries.

2014-15 ANNUAL REPORT - TRINITY RIVER BASIN SALMON AND STEELHEAD MONITORING PROJECT: CHINOOK AND COHO SALMON AND FALL-RUN STEELHEAD RUN-SIZE ESTIMATES USING MARK-RECAPTURE METHODS 2014-15 SEASON

Wed, 15 Jun 2016 14:25:32 -0700

Trinity River, CA salmon and steelhead monitoring - 2014-15 annual report of Trinity River basin salmon and steelhead monitoring. Run size, spawner escapement, and harvest estimation.

2012-13 Final Annual Report - Trinity River Basin Salmon and Steelhead Monitoring Project

Mon, 13 Jul 2015 09:26:40 -0700

Trinity River, CA salmon and steelhead monitoring - 2012-13 season Final annual report on monitoring projects of the Trinity River Project and lower Klamath River creel census.

2013-14 Final Annual Report - Trinity River Basin Salmon and Steelhead Monitoring Project

Mon, 13 Jul 2015 09:21:50 -0700

Trinity River, CA salmon and steelhead monitoring - 2013-14 season Final annual report on monitoring projects of the Trinity River Project.

2008 Steelhead Surveys by Watershed Data Collected by the USFS Orleans/Happy Camp Ranger Districts

Thu, 01 May 2014 12:24:30 -0700

Steelhead Surveys by Watershed USFS Orleans Happy Camp Ranger Districts - None

Annual Report Trinity River Basin Salmon and Steelhead Monitoring Project 2000-2001 Season

Wed, 30 Apr 2014 11:47:06 -0700

Annual Report Trinity River Basin Salmon and Steelhead Monitoring Project - The California Department of Fish and Game's Trinity River Project conducted tagging and recapture operations from June 2000 through March 2001 to obtain chinook salmon ( Oncorhynchuss tshawytscha), shoo salmon (O. kisutch), and adult fall-run steelhead (O. mykiss) run-size, angler harvest, and spawner escapement estimates in the Trinity River basin. We placed Weirs in the Trinity River near the towns of Junction City and Willow Creek, and trapped 3,796 chinook salmon, 235 coho salmon, 416 fall-run steelhead and 43 brown trout (Salmotrutta). Based on tagged fish recovered at Trinity River Hatchery and on the return of reward tags by anglers, we estimated that 26,083 spring run chinook salmon migrated into the Trinity River basin upstream of Junction City Weir and that 1,807 (6.9%) of these were caught by anglers, leaving 24,275 fish as potential spawners. We estimated 55,473 fall-run chinook salmon migrated past Willow Creek Weir and that 1,583 (2.9%) of these were caught by anglers, leaving 53,890 as potential spawners. The coho salmon run in the Trinity River basin upstream of Willow Creek Weir was estimated to be 15,532 fish. No coho were estimated to be harvested, thus all coho were potential spawners. An estimated 8,042 adult fall-run steelhead entered the Trinity River basin upstream of Willow Creek Weir. Anglers harvested 177 (2.2%) of adult fall-run steelhead that migrated past Willow Creek Wier, leaving 7,865 fish as potential spawners.

Scott River Adult Coho Survey Table VI. Redds by Survey Year 2001-2008

Wed, 30 Apr 2014 10:19:33 -0700

Scott River Adult Coho Spawning Grounds Survey - None

Assessment of Anadromous Salmonid Spawning in Blue Creek, Tributary to the Lower Klamath River, During 2011-2012

Wed, 30 Apr 2014 10:19:32 -0700

Assessment of Anadromous Salmonid Spawning in Blue Creek - None

Scott River Adult Coho Spawning Ground Surveys 2012-2013 Season

Wed, 30 Apr 2014 10:19:31 -0700

Scott River Adult Coho Spawning Grounds Surveys - Adult coho salmon spawning ground surveys were conducted between November 20th, 2012 and January 10th, 2013. During the survey a total of six (6) adult coho salmon carcasses and 24 redds were observed. Spawning was observed in a total of six tributary locations including the South Fork Scott River, Sugar Creek, French Creek, Miners Creek, Shackleford Creek and Mill Creek. No spawning was documented in Patterson Creek, but a live coho was observed in the upper reach. These locations are the same reaches where coho salmon have been observed spawning in previous surveys of this brood year, and have always been observed in the other brood years. Preliminary data from the California Department of Fish and Game (CDFG) video weir showed a total of 201 adult coho passing through the video weir, although it should be noted that this number is likely incomplete as the counting weir washed out on November 29th, 2013. The 2012 water year was a dry water year type and was followed after October 1st by below normal precipitation until late November. Flow conditions were low during the early portion of the survey season; two water lease transactions implemented by the Scott River Water Trust on Oct. 1st assisted with moving salmon over the Scott Valley Irrigation District Diversion at Young's Dam (RM 47). However, despite the leasing of 11 cfs of stockwater at Farmer's Ditch at RM 54, the tailings were not reconnected until rains began on November 20th, 2012. This disconnection delayed salmon access to Sugar Creek, the South Fork and the East Fork until that date. These low flow conditions also appear to have delayed or prevented coho salmon from passing the alluvial reaches of Kidder Creek and Etna Creek. No spawning was documented in these tributaries, although it should be noted that unsurveyed reaches in Big Slough area and lower Etna Creek may have had spawning.

Assessment of Anadromous Salmonid Spawning in Blue Creek, Tributary to the Lower Klamath River, During 2010

Wed, 30 Apr 2014 10:19:31 -0700

Assessment of Anadromous Salmonid Spawning in Blue Creek - None

Scott River Adult Coho Spawning Grounds Surveys December 2009-January 2010

Wed, 30 Apr 2014 10:19:30 -0700

Scott River Adult Coho Spawning Grounds Surveys - Adult coho spawning ground surveys were completed in the Scott River watershed between December 10th, 2009 and January 14th, 2010. A total of 32.37 miles of survey were completed, 20.82 miles of tributary and 11.55 miles of mainstem Scott River. Adult coho access was limited by low flows, periods of frozen water, and beaver dams for varying periods during the spawning season. A total of five live coho, two coho carcasses, and six redds were observed during the Spawning Ground Surveys. The adult counting facility operated by the California Dept. of Fish and Game counted 81 adult coho passing through the weir. It is recommended that future survey efforts focus on gathering adult distribution data and biological data. The count provided by CDFG at the weir will provide better numbers of total live fish than mark and recapture efforts.

Scott River Adult Coho Spawning Grounds Surveys December 2010-January 2011

Wed, 30 Apr 2014 10:19:30 -0700

Scott River Adult Coho Spawning Grounds Surveys - In 2010-2011, adult coho spawning ground surveys were completed in the Scott River Watershed in order to continue to further existing knowledge of the distribution and timing of coho salmon. A total of 42.0 miles were surveyed (9.10 miles on the mainstem and 32.90 miles on tributaries). Surveys consisted of trained crews walking established reaches either instream or on the bank in order to collect information on lives, carcasses, and redds. Most reaches were surveyed weekly; however, some reaches were surveyed only once. Streams that were surveyed include: East Fork Scott River, South Fork Scott River, Sugar Creek, French-Miners Creek, Etna Creek, Patterson Creek, Kidder Creek, Shackleford-Mill Creek, Kelsey Creek, Canyon Creek, and Tompkins Creek. The survey season lasted from November 17th 2010- January 12th 2011. During this period a total of 162 redds, and 35 carcasses were identified.

Scott River Adult Coho Spawning Ground Surveys 2011 Season

Wed, 30 Apr 2014 10:19:30 -0700

Scott River Adult Coho Spawning Grounds Surveys - In 2011, adult coho spawning ground surveys were completed in the Scott River Watershed in order to continue to further existing knowledge of the distribution and timing of coho salmon. A total of 21.4 miles were surveyed (3.10 miles on the mainstem and 18.3 miles on tributaries). Surveys consisted of trained crews walking established reaches either instream or on the bank in order to collect information on lives, carcasses, and redds. Most reaches were surveyed weekly; however, some reaches were surveyed once. Streams that were surveyed include: East Fork Scott River, South Fork Scott River, Sugar Creek, French-Miners Creek, Etna Creek, Patterson Creek, Kidder Creek, Shackleford-Mill Creek, Kelsey Creek, Canyon Creek and Tompkins Creek. The survey season lasted from November 23rd 2011-December 19th 2011. During this period a total of 26 redds, and 16 carcasses were identified.

2003-2004 Annual Report Trinity River Tributaries Winter-Run Steelhead Spawning Survey Report Project 1d1

Wed, 30 Apr 2014 10:19:29 -0700

Annual Report Trinity River Tributaries Winter-Run Steelhead Spawning Survey Report - This report documents results of spawning surveys conducted by the California Department of Fish and Game on randomly selected Trinity river tributaries from March through May 2003. This is the fourth consecutive season of spawning surveys on selected tributaries and serves to create an index of in-river spawning steelhead abundance by enumerating redds. Between March and May 2003, we observed a total of 97 redds in 79 kilometers of surveyed habitat. Overall redd density for all tributaries surveyed as 1.22 redds/kilometer. The highest redd density occurred in Eltapom Creek (3.85 redds/km), while zero redds were observed in three tributaries: Rattlesnake, Dutch, and Pelletreau Creeks. During the course of the surveys, crews encountered 55 adult steelhead, 21 of which were observed in Reading Creek.

2004-2005 Annual Report Trinity River Tributaries Winter-Run Steelhead Spawning Survey Report Project 1d1

Wed, 30 Apr 2014 10:19:29 -0700

Annual Report Trinity River Tributaries Winter-Run Steelhead Spawning Survey Report - This report documents results of spawning surveys conducted by the California Department of Fish and Game on randomly selected Trinity River tributaries from March through June of 2005. This is the sixth consecutive season of spawning surveys on selected tributaries and serves to create an index of in-river spawning steelhead abundance by enumerating redds. Between March and June 2005, we observed a total of 57 redds in 84.2 kilometers of surveyed habitat. Overall redd density for all tributaries surveyed was 0.676 redds/kilometers. The highest redd density occurred in East Fork Trinity River, Chanchelulla and South Fork Indian and Glen Creeks, and Bridge Gulch. During the course of the surveys, crews encountered 76 adult steelhead, 38 of which were observed in Deadwood Creek. Redd densities may be negatively biased in comparison to previous seasons due to high flows which made survey periodicity problematic.

Final Report Scott River Adult Coho Spawning Ground Surveys November 2005-January 2006

Wed, 30 Apr 2014 10:19:29 -0700

Scott River Adult Coho Spawning Grounds Surveys - The 2005-2006 Adult Coho Spawner Ground Surveys began in the Scott River and tributaries on November 11, 2005. Surveys were formally initiated at this time because adult Chinook were observed spawning in Shackleford Creek on November 9th, 2005. Coho surveys were started in an effort to positively identify Chinook redds versus coho redds in areas where the two species were using the same spawning grounds. Adult coho spawning ground surveys were completed in a total of 34.10 miles; 4.75 of the mainstem, and 29.35 miles of tributary. Chinook and coho were both documented spawning in lower Sugar Creek and lower Shackleford Creek. Adult coho spawning was observed in lower Shackleford Creek, Mill Creek, French Creek and Miners Creek. An early season redd without fish was observed in the Scott River Tailings, what was likely a coho redd was observed in the East Fork (spot survey) and a late season redd in Scott Bar Mill Creek may have been a steelhead. Two spawned out female carcasses were found in Kidder Creek, but redds were not observed in the survey reach. Heavy flows began the day after the carcasses were found, preventing the opportunity to search for redds further upstream. In addition, the California Department of Fish and Game (Klamath Basin Cooperative Spawning Ground Surveys) found five carcasses in the Scott River near Shackleford Creek. High flow conditions for most of the survey period (Mid-Dec - mid-January) prevented regular surveys from occurring in many locations. The precipitation measured at Fort Jones was 262% of average in December, and 221% of average in January. A total of 33 redds were identified; of the 33; two were King salmon (Chinook), 14 were positively identified as coho, and an additional 10 were determined to be coho based on run timing and presence of live coho observed in the vicinity of the redd, for a total of 23 coho redds. Six redds are classified as unknown, no fish observed. These redds were observed early in the season, and could have been Chinook. An additional redd found late in the season (Jan11th) may be coho, but could potentially have been steelhead. A significant finding for this survey season was an extensive overlap in the timing of adult Chinook and adult coho spawning. Based on observations over the past five years, it appears that coho begin to actively spawn directly after the first significant rain event. In certain years this can be early enough to occur during the active period of Chinook spawning.

Final Report Adult Coho Spawning Ground Surveys 2006-2007

Wed, 30 Apr 2014 10:19:29 -0700

Scott River Adult Coho Spawning Grounds Surveys - Adult Coho Spawning Ground Surveys were completed in a total of 43.65 miles of Scott River mainstem and tributaries. Surveys were completed between November 14 the and January 12th. Flow conditions during December were too high to survey during the second and fourth weeks. During the survey season, a total of fourteen redds were identified. Based on professional judgment (timing, size and location), seven of the redds are likely coho, and five of the redds are likely Chinook. The remaining two redds were not definitely completed, but timing would indicate that they were coho redds. No new redds were observed after December 8th, 2006. A total of six adult coho carcasses were found, four male and two female. One carcass (female) was found in Shackleford, one in the mainstem Scott (male), the rest were found in French Creek. Tissue, scale and otoliths were collected to contribute to the ongoing life history studies in the Klamath basin. As in previous years, there were observed overlap in Chinook and coho spawning. The following is apparent from previous years surveys; that coho will move into the system and begin spawning as soon as the first runoff event in the fall, and that Chinook will spawn in low gradient tributary reaches, typically considered coho spawning habitat, if flows allow during the Chinook run. These tendencies allow for significant spatial and temporal overlap in spawning, especially in French, Sugar and Shackleford creeks.

2001-2002 Annual Report Trinity River Tributaries Winter-Run Steelhead Spawning Survey Report Project 1d1

Wed, 30 Apr 2014 10:19:28 -0700

Annual Report Trinity River Tributaries Winter-Run Steelhead Spawning Survey Report - Spawning surveys for winter-run steelhead were conducted on tributaries of the Trinity River from March 1 through June 27, 2002. We walked a total of 12 tributaries, four times each, for a single pass total of 77.3 km. This year, 69 adult steelhead were observed, and 265 redds were marked and recorded. 202 redd densities were considerably higher than any of the past 10 years in the Trinity basin. The highest density of steelhead redds occurred in East Fork Hayfork Creek at 9.4 redds per km, while the lowest density occurred in Pelletreau Creek, where no redds were observed. A final pass of all tributaries was made to assess the visibility of redds, change in apparent area, and verify completion of spawning. Overall, 52% of all redds flagged were visible during the final pass, while the apparent area of those redds decreased 48%. Tributaries to be surveyed were randomly selected from a universe of all anadromous Trinity River tributaries upstream of the New River. Coincidentally, several selected tributaries duplicate the work of D. A. LaFaunce (1964), D.W. Rogers (1971, 1972), Ed Miller (1974), and the South Fork Steelhead Monitoring Project (1990-1995), and all applicable comparisons are made.

Assessment of Anadromous Salmonid Spawning in Blue Creek, Tributary to Lower Klamath River, During 2009

Wed, 30 Apr 2014 10:19:26 -0700

Assessment of Anadromous Salmonid Spawning in Blue Creek - The Yurok Tribal Fisheries Program (YTFP) continued long-term monitoring of anadromous salmonid populations in Blue Creek, a fourth order lower Klamath River tributary, during 2009. This project assessed adult escapement and spawning activity during fall months via direct observation. The resulting information provided a means of assessing escapement estimates and spawning trends of Blue Creek salmonids as well as enhancing knowledge of the life history of this unique fish populations. Spawning surveys were used in Blue Creek drainage to assess migration timing and relative abundance of live fish, redds, and carcasses. The Peak Count Method (PCM) is the traditional method used to provide an index of salmonid escapement (Gale 2009). Although the PCM provides valuable information on spawning salmonids, it does not generate an estimate of escapement. The primary objective of this project was to capture upstream migrant chinook salmon (Oncorhynchus tshawytscha), mark with highly visible streamer tags, and visually recapturing marked fish during traditional snorkel counts. By employing mark/recapture techniques, we estimated stream residence time and escapement using the Area-Under -the-Curve (AUC) method (Hetrick et. Al 2003). Three marking events were implemented during fall 2009, resulting in a total of forty five marked Chinook. Recapture events were coupled with traditional PCM snorkel surveys. The peak count occurred during week ending 13-Nov with 1,029 chinook observed. A total of 95 recaptured chinook were observed during eight weeks of snorkel surveys. Stream residence time was estimated to be 16.18 days and total escapement was estimated to be 2,334.9 (+/- 140.96).

Assessment of Anadromous Salmonid Spawning in Blue Creek Lower Klamath River, California, Fall 1999-2008

Wed, 30 Apr 2014 10:19:25 -0700

Assessment of Anadromous Salmonid Spawning in Blue Creek - The Yurok Tribal Fisheries Program (YTFP) continued long-term monitoring of anadromous salmonid populations in Blue Creek, a fourth order lower Klamath River tributary, during 1999-2008. This project assessed adult escapement and spawning activity during the fall months via direct observation. The resulting information provided a means of assessing the spawning trends of Blue Creek salmonids as well as enhancing knowledge of the life history of this unique fish populations. Peak weekly counts of adult chinook in lower Blue Creek ranged from a low of 78 adults and 40 jacks in 2006 to a high of 1,090 adult and 31 jacks in 2003. YTFP documented weekly peak counts of adult coho salmon ranging from a low of seven fish in 2000 to a high of 135 fish in 2004. The peak immigration and spawning period of Blue Creek coho likely occurred after high flows necessitated the cessation of surveys during most years. In addition, small numbers of adult steelhead were observed each year during fall surveys, with larger numbers of steelhead half-pounders and adult cutthroat trout routinely documented throughout the survey periods. YTFP documented total salmon redd numbers in the drainage ranging from a low of 74 redds in 2001 to a high of 433 redds in 2000. Variable access conditions to the upper survey reaches, as well as the premature cessation of surveys due to high flow conditions in many years make the true quantification of salmon redds throughout the basin difficult during most survey seasons. Salmon carcass recoveries during the fall surveys ranged from a low of three carcasses in 2005 to a high of 171 carcasses in 2008. High predation rates, as well as premature cessation of surveys due to high flow conditions in many years make the location of carcasses difficult during most years in Blue Creek. The information generated during this project has refined our understanding of adult salmonid migration and spawning trends throughout the fall months. This data continues to provide important information on the long-term population trends and health of salmon in the Blue Creek basin, as well as refine our understanding of spawning habitat preferences throughout the watershed.

2007 Steelhead Surveys by Watershed Data Collected by the USFS Orleans/Happy Camp Ranger Districts

Wed, 30 Apr 2014 10:19:24 -0700

Steelhead Surveys by Watershed USFS Orleans Happy Camp Ranger Districts - None

2009 Steelhead Surveys by Watershed Data Collected by the USFS Orleans/Happy Camp Ranger Districts

Wed, 30 Apr 2014 10:19:24 -0700

Steelhead Surveys by Watershed USFS Orleans Happy Camp Ranger Districts - None

2010 Steelhead Surveys by Watershed Data Collected by the USFS Orleans/Happy Camp Ranger Districts

Wed, 30 Apr 2014 10:19:24 -0700

Steelhead Surveys by Watershed USFS Orleans Happy Camp Ranger Districts - None

2011 Steelhead Surveys by Watershed Data Collected by the USFS Orleans/Happy Camp Ranger Districts

Wed, 30 Apr 2014 10:19:24 -0700

Steelhead Surveys by Watershed USFS Orleans Happy Camp Ranger Districts - None

2012 Steelhead Surveys by Watershed Data Collected by the USFS Orleans/Happy Camp Ranger Districts

Wed, 30 Apr 2014 10:19:24 -0700

Steelhead Surveys by Watershed USFS Orleans Happy Camp Ranger Districts - None

2013 Steelhead Surveys by Watershed Data Collected by the USFS Orleans/Happy Camp Ranger Districts

Wed, 30 Apr 2014 10:19:24 -0700

Steelhead Surveys by Watershed USFS Orleans Happy Camp Ranger Districts - None

2012 South Fork Trinity River Spring Chinook and Summer Steelhead Snorkel Survey Totals

Wed, 30 Apr 2014 10:19:23 -0700

South Fork Trinity River Spring Chinook Summer Steelhead Snorkel Survey - The annual South Fork Trinity River snorkel survey was completed this year on August 21 and 22, 2012 thanks to the enthusiastic efforts of all involved! All should be proud of the massive effort that was put forth to survey 104.2 river kilometers. Surveyors from a wide variety of agencies, mostly from within the basin, observed a total of 773 adult Chinook, 61 Chinook grilse, 204 adult steelhead, and 64 steelhead half pounders for the second highest count since these surveys began (Table 1)! Additionally, 15.3 river miles of Hayfork Creek were surveyed separately this year on July 19, 2012 lead by the Hayfork Watershed Center in hopes of better visibility due to increased turbidity over the years in Hayfork Creek (Table 2).

2000 Hayfork Creek Summer Snorkel Surveys

Wed, 30 Apr 2014 10:19:23 -0700

Hayfork Creek Summer Snorkel Surveys - Snorkel Surveys have been conducted with the help of various federal, state, local, tribal, and private entities on four Trinity River tributaries since 1978. Currently the California Department of Fish and Game (CaDFG) coordinates the South Fork Trinity River snorkel survey each year and the USFS coordinates the Canyon Creek, North Fork and New River snorkel surveys. Annual data gaps exist for individual tributaries and for individual years and have been noted in the "Dive Megatable" tab using the comments function. In the "Reach Megatable" tab, each survey year for each tributary, has been hyperlinked to the supporting documentation on file. Snorkel surveys are normally conducted during August of each year with the established chronological order being; Canyon Creek, North Fork Trinity River, South Fork Trinity River, and New River. Snorkel surveys are performed in 1-3 days for each tributary stream and depends on the number of participants. Snorkel surveys are performed each day by 2-4 person teams, on assigned reaches that range from 1.6 - 5.8 miles in length, in an upstream to downstream manner. Some data collected are presented in Julian Week (JW) format. Each JW is defined as one of a consecutive set of 52 weekly periods, beginning 1 January, regardless of the day of the week on which 1 January falls. The extra day during leap years is added to the 9th week, and the last day of the year is included in the 52nd week. This procedure allows inter-annual comparisons of similar weekly periods. The data in the "DFG Springer Megatable" tab, used to determine annual Trinity River Basin hatchery spawner sub-totals, natural spawner sub-totals, harvest sub-totals, and total Trinity Basin escapement totals, have been adapted from the "California Department of Fish and Game (CaDFG) Klamath River Basin Spring-run Chinook Megatable".

2003 South Fork Trinity River Spring Chinook/Summer Steelhead Snorkel Survey Totals

Wed, 30 Apr 2014 10:19:23 -0700

South Fork Trinity River Spring Chinook Summer Steelhead Snorkel Survey - Snorkel surveys were conducted on the South Fork Trinity River and Hayfork Creek on August 19 and 20, 2003. The upper South Fork (sections A-G) was surveyed on August 19th; Hayfork Creek and the lower South Fork (sections H-L and X-Z) were surveyed on August 20th. Water clarity (visibility) was good on the upper river, but poorer on sections of the lower river and Hayfork Creek, obscuring observations in deep pools.

2007 Hayfork Creek Summer Snorkel Surveys

Wed, 30 Apr 2014 10:19:23 -0700

2004 Steelhead Surveys by Watershed Data Collected by the USFS Orleans/Happy Camp Ranger Districts

Wed, 30 Apr 2014 10:19:23 -0700

Steelhead Surveys by Watershed USFS Orleans Happy Camp Ranger Districts - None

2005 Steelhead Surveys by Watershed Data Collected by the USFS Orleans/ Happy Camp Ranger Districts

Wed, 30 Apr 2014 10:19:23 -0700

Steelhead Surveys by Watershed USFS Orleans Happy Camp Ranger Districts - None

2006 Steelhead Surveys by Watershed Data Collected by USFS Orleans/ Happy Camp Ranger District

Wed, 30 Apr 2014 10:19:23 -0700

Steelhead Surveys by Watershed USFS Orleans Happy Camp Ranger Districts - None

2006 South Fork Trinity River Spring Chinook/Summer Steelhead Snorkel Survey Totals

Wed, 30 Apr 2014 10:19:22 -0700

South Fork Trinity River Spring Chinook Summer Steelhead Snorkel Survey - Snorkel surveys were conducted on the South Fork Trinity River and Hayfork Creek on August 24th and 25th, 2004. The upper South Fork (sections B-G) was surveyed on August 24th, Hayfork Creek and the lower South Fork (sections H-L and X-Z) were surveyed on August 25th. Water clarity (visibility) was excellent on the entire river, ranging from 20-30 feet.

South Fork Trinity River Main Stem Summer Snorkel Surveys 2007

Wed, 30 Apr 2014 10:19:22 -0700

South Fork Trinity Main Stem Summer Snorkel Surveys - Snorkel Surveys have been conducted with the help of various federal, state, local, tribal, and private entities on four Trinity River tributaries since 1978. Currently the California Department of Fish and Game (CaDFG) coordinates the South Fork Trinity River snorkel survey each year and the USFS coordinates the Canyon Creek, North Fork and New River snorkel surveys. Annual data gaps exist for individual tributaries and for individual years and have been noted in the "Dive Megatable" tab using the comments function. In the "Reach Megatable" tab, each survey year for each tributary, has been hyperlinked to the supporting documentation on file. Snorkel surveys are normally conducted during August of each year with the established chronological order being; Canyon Creek, North Fork Trinity River, South Fork Trinity River, and New River. Snorkel surveys are performed in 1-3 days for each tributary stream and depends on the number of participants. Snorkel surveys are performed each day by 2-4 person teams, on assigned reaches that range from 1.6 - 5.8 miles in length, in an upstream to downstream manner. Some data collected are presented in Julian Week (JW) format. Each JW is defined as one of a consecutive set of 52 weekly periods, beginning 1 January, regardless of the day of the week on which 1 January falls. The extra day during leap years is added to the 9th week, and the last day of the year is included in the 52nd week. This procedure allows inter-annual comparisons of similar weekly periods. The data in the "DFG Springer Megatable" tab, used to determine annual Trinity River Basin hatchery spawner sub-totals, natural spawner sub-totals, harvest sub-totals, and total Trinity Basin escapement totals, have been adapted from the "California Department of Fish and Game (CaDFG) Klamath River Basin Spring-run Chinook Megatable".

2009 South Fork Trinity River Spring Chinook and Summer Steelhead Snorkel Survey Totals

Wed, 30 Apr 2014 10:19:22 -0700

South Fork Trinity River Spring Chinook Summer Steelhead Snorkel Survey - The annual South Fork Trinity River snorkel survey was completed this year thanks to help from the U.S. Fish & Wildlife Service, U.S. Forest Service, Yurok Tribal Fisheries, Americorps, California Department of Fish and Game, and volunteers from the Hayfork Watershed Research and Training Center. This year’s survey was accomplished by two and three person crews snorkeling downstream and diving to look into deeper crevasses. A total of 109 adult Chinook, 9 Chinook grilse, 61 adult steelhead, and 33 steelhead half pounders were observed (Table 1). The upper two sections on the South Fork Trinity River, Raspberry Gulch to the confluence with East Fork of the South Fork Trinity River and the East Fork of the South Fork Trinity River to the confluence with the main stem South Fork, were not surveyed due to a lack of water. The river was surveyed from this confluence pool with the East Fork of the South Fork down to Mule Bridge and from Low Bridge to Sandy Bar. Hayfork Creek was not surveyed this year due to lack of manpower, road construction on the Hyampom Road, and high turbidity in the creek. Two sections from Mule Bridge to Low Bridge were also not surveyed due to lack of personnel. These two sections generally have very low counts of both summer steelhead and spring Chinook. The following tables show the numbers of fish observed in this year’s survey, and the numbers of fish observed in surveys since 1996. Spring Chinook are divided into the following two categories; >22” is a Chinook and 16” is an adult Steelhead and < 16” is a half pounder. Half pounder counts carry less weight in counts of Summer Steelhead because they are easily confused with large resident, non-anadromous steelhead. Therefore, their numbers are not included in annual counts of Summer Steelhead (Table2).

2010 South Fork Trinity River Spring Chinook and Summer Steelhead Snorkel Survey Totals

Wed, 30 Apr 2014 10:19:22 -0700

South Fork Trinity River Spring Chinook Summer Steelhead Snorkel Survey - The annual South Fork Trinity River snorkel survey was completed this year on August 17 and 18, 2010 thanks to help from the U.S. Fish & Wildlife Service, U.S. Forest Service, Yurok Tribal Fisheries, Americorps, California Department of Fish and Game, N.O.A.A. Fisheries, Hayfork Watershed Research and Training Center, and interested volunteers. Approximately 61.4 river miles were surveyed this year by two to four person crews snorkeling downstream and diving to look into crevasses. A total of 105 adult Chinook, 15 Chinook grilse, 88 adult steelhead, and 71 steelhead half pounders were observed in the South Fork Trinity River (Table 1). Approximately 15.3 river miles of Hayfork Creek were surveyed separately this year on July 27, 2010 in hopes of better visibility due to increased turbidity over the years in Hayfork Creek (Table 3). The following tables show the numbers of fish observed in this year’s survey, and the numbers of fish observed in surveys since 1996. Spring Chinook are divided into the following two categories; >22” is a Chinook and 16” is an adult Steelhead and < 16” is a half pounder. Half pounder counts carry less weight in counts of Summer Steelhead because they are easily confused with large resident, non-anadromous steelhead. Therefore, their numbers are not included in annual counts of Summer Steelhead (Table2). The South Fork Trinity River snorkel survey has expanded over the years since the 1964 flood deposited massive amounts of sediment in the river. The summer survey originally consisted of one index reach and has extended downstream over the years to eventually include Hayfork Creek. A mark-recapture estimate of the 1963/64 escapement of 11,604 Chinook and 3,5000 steelhead to the South Fork Trinity was a pretty rough estimate, but local residents and fishermen talk of huge runs before the 1964 flood deposited massive amounts of sediment in the river bed, filling in many huge, deep holes. Chinook and steelhead runs since then have been much smaller, and luckily there is still enough interest to attempt to enumerate these summer fish.

2011 South Fork Trinity River Spring Chinook and Summer Steelhead Snorkel Survey Totals

Wed, 30 Apr 2014 10:19:22 -0700

South Fork Trinity River Spring Chinook Summer Steelhead Snorkel Survey - The annual South Fork Trinity River snorkel survey was completed this year on August 17 and 18, 2011 thanks to the enthusiastic volunteer efforts of all involved! All should be proud of the massive effort that was put forth to survey 82.7 river miles. Volunteers from a wide variety of agencies, mostly from within the basin, observed a total of 240 adult Chinook, 197 Chinook grilse, 186 adult steelhead, and 107 steelhead half pounders (Table 1). Additionally, 15.3 river miles of Hayfork Creek were surveyed separately this year on July 13, 2011 in hopes of better visibility due to increased turbidity over the years in Hayfork Creek (Table 2).

North Fork Trinity River Summer Snorkel Surveys 2012

Wed, 30 Apr 2014 10:19:21 -0700

North Fork Trinity River Summer Snorkel Surveys - Snorkel Surveys have been conducted with the help of various federal, state, local, tribal, and private entities on four Trinity River tributaries since 1978. Currently the California Department of Fish and Game (CaDFG) coordinates the South Fork Trinity River snorkel survey each year and the USFS coordinates the Canyon Creek, North Fork and New River snorkel surveys. Annual data gaps exist for individual tributaries and for individual years and have been noted in the "Dive Megatable" tab using the comments function. In the "Reach Megatable" tab, each survey year for each tributary, has been hyperlinked to the supporting documentation on file. Snorkel surveys are normally conducted during August of each year with the established chronological order being; Canyon Creek, North Fork Trinity River, South Fork Trinity River, and New River. Snorkel surveys are performed in 1-3 days for each tributary stream and depends on the number of participants. Snorkel surveys are performed each day by 2-4 person teams, on assigned reaches that range from 1.6 - 5.8 miles in length, in an upstream to downstream manner. Some data collected are presented in Julian Week (JW) format. Each JW is defined as one of a consecutive set of 52 weekly periods, beginning 1 January, regardless of the day of the week on which 1 January falls. The extra day during leap years is added to the 9th week, and the last day of the year is included in the 52nd week. This procedure allows inter-annual comparisons of similar weekly periods. The data in the "DFG Springer Megatable" tab, used to determine annual Trinity River Basin hatchery spawner sub-totals, natural spawner sub-totals, harvest sub-totals, and total Trinity Basin escapement totals, have been adapted from the "California Department of Fish and Game (CaDFG) Klamath River Basin Spring-run Chinook Megatable".

South Fork Trinity River Main stem Summer Snorkel Surveys 2000

Wed, 30 Apr 2014 10:19:21 -0700

South Fork Trinity River Main Stem Summer Snorkel Surveys - Snorkel Surveys have been conducted with the help of various federal, state, local, tribal, and private entities on four Trinity River tributaries since 1978. Currently the California Department of Fish and Game (CaDFG) coordinates the South Fork Trinity River snorkel survey each year and the USFS coordinates the Canyon Creek, North Fork and New River snorkel surveys. Annual data gaps exist for individual tributaries and for individual years and have been noted in the "Dive Megatable" tab using the comments function. In the "Reach Megatable" tab, each survey year for each tributary, has been hyperlinked to the supporting documentation on file. Snorkel surveys are normally conducted during August of each year with the established chronological order being; Canyon Creek, North Fork Trinity River, South Fork Trinity River, and New River. Snorkel surveys are performed in 1-3 days for each tributary stream and depends on the number of participants. Snorkel surveys are performed each day by 2-4 person teams, on assigned reaches that range from 1.6 - 5.8 miles in length, in an upstream to downstream manner. Some data collected are presented in Julian Week (JW) format. Each JW is defined as one of a consecutive set of 52 weekly periods, beginning 1 January, regardless of the day of the week on which 1 January falls. The extra day during leap years is added to the 9th week, and the last day of the year is included in the 52nd week. This procedure allows inter-annual comparisons of similar weekly periods. The data in the "DFG Springer Megatable" tab, used to determine annual Trinity River Basin hatchery spawner sub-totals, natural spawner sub-totals, harvest sub-totals, and total Trinity Basin escapement totals, have been adapted from the "California Department of Fish and Game (CaDFG) Klamath River Basin Spring-run Chinook Megatable".

2001-2002 Annual Report Summer Steelhead Snorkel Survey of South Fork Trinity River Project Ic1

Wed, 30 Apr 2014 10:19:21 -0700

Annual Report Summer Steelhead Snorkel Survey of South Fork Trinity River Project - Snorkel surveys were conducted on the South Fork Trinity River (SFTR) and Hayfork Creek on August 20 and 21, 2002. The survey of SFTR yielded 21 adult steelhead, 33-1/2lb.steelhead, 293 spring-run Chinook salmon and 37 grilse. The survey of Hayfork Creek yielded 14 adult steelhead, 9-1/2 lb. steelhead, 56 adult spring Chinook and 0 grilse. A total of 17 sections were surveyed. Four adult spring Chinook carcasses were observed in the SFTR. Sections E and F were divided to ease logistical complications. Water visibility was excellent, and no active sediment discharge sites were encountered.

South Fork Trinity River Main Stem Summer Snorkel Surveys 2003

Wed, 30 Apr 2014 10:19:21 -0700

2004 South Fork Trinity River Spring Chinook/Summer Steelhead Snorkel Survey Totals

Wed, 30 Apr 2014 10:19:21 -0700

2005 South Fork Trinity River Spring Chinook/Summer Steelhead Snorkel Survey Totals

Wed, 30 Apr 2014 10:19:21 -0700

Canyon Creek Summer Snorkel Surveys 2006

Wed, 30 Apr 2014 10:19:20 -0700

Canyon Creek Summer Snorkel Survey - Snorkel Surveys have been conducted with the help of various federal, state, local, tribal, and private entities on four Trinity River tributaries since 1978. Currently the California Department of Fish and Game (CaDFG) coordinates the South Fork Trinity River snorkel survey each year and the USFS coordinates the Canyon Creek, North Fork and New River snorkel surveys. Annual data gaps exist for individual tributaries and for individual years and have been noted in the "Dive Megatable" tab using the comments function. In the "Reach Megatable" tab, each survey year for each tributary, has been hyperlinked to the supporting documentation on file. Snorkel surveys are normally conducted during August of each year with the established chronological order being; Canyon Creek, North Fork Trinity River, South Fork Trinity River, and New River. Snorkel surveys are performed in 1-3 days for each tributary stream and depends on the number of participants. Snorkel surveys are performed each day by 2-4 person teams, on assigned reaches that range from 1.6 - 5.8 miles in length, in an upstream to downstream manner. Some data collected are presented in Julian Week (JW) format. Each JW is defined as one of a consecutive set of 52 weekly periods, beginning 1 January, regardless of the day of the week on which 1 January falls. The extra day during leap years is added to the 9th week, and the last day of the year is included in the 52nd week. This procedure allows inter-annual comparisons of similar weekly periods. The data in the "DFG Springer Megatable" tab, used to determine annual Trinity River Basin hatchery spawner sub-totals, natural spawner sub-totals, harvest sub-totals, and total Trinity Basin escapement totals, have been adapted from the "California Department of Fish and Game (CaDFG) Klamath River Basin Spring-run Chinook Megatable".

Trinity River Tributary Annual Summer Snorkel Survey 2007

Wed, 30 Apr 2014 10:19:20 -0700

Trinity River Tributary Annual Summer Snorkel Survey - Snorkel Surveys have been conducted with the help of various federal, state, local, tribal, and private entities on four Trinity River tributaries since 1978. Currently the California Department of Fish and Game (CaDFG) coordinates the South Fork Trinity River snorkel survey each year and the USFS coordinates the Canyon Creek, North Fork and New River snorkel surveys. Annual data gaps exist for individual tributaries and for individual years and have been noted in the "Dive Megatable" tab using the comments function. In the "Reach Megatable" tab, each survey year for each tributary, has been hyperlinked to the supporting documentation on file. Snorkel surveys are normally conducted during August of each year with the established chronological order being; Canyon Creek, North Fork Trinity River, South Fork Trinity River, and New River. Snorkel surveys are performed in 1-3 days for each tributary stream and depends on the number of participants. Snorkel surveys are performed each day by 2-4 person teams, on assigned reaches that range from 1.6 - 5.8 miles in length, in an upstream to downstream manner. Some data collected are presented in Julian Week (JW) format. Each JW is defined as one of a consecutive set of 52 weekly periods, beginning 1 January, regardless of the day of the week on which 1 January falls. The extra day during leap years is added to the 9th week, and the last day of the year is included in the 52nd week. This procedure allows inter-annual comparisons of similar weekly periods. The data in the "DFG Springer Megatable" tab, used to determine annual Trinity River Basin hatchery spawner sub-totals, natural spawner sub-totals, harvest sub-totals, and total Trinity Basin escapement totals, have been adapted from the "California Department of Fish and Game (CaDFG) Klamath River Basin Spring-run Chinook Megatable".

Canyon Creek Summer Snorkel Surveys 2008

Wed, 30 Apr 2014 10:19:20 -0700

Trinity River Tributary Annual Summer Snorkel Survey 2011

Wed, 30 Apr 2014 10:19:20 -0700

Canyon Creek Summer Snorkel Surveys 2012

Wed, 30 Apr 2014 10:19:20 -0700

North Fork Trinity River Summer Snorkel Surveys 2006

Wed, 30 Apr 2014 10:19:20 -0700

North Fork Trinity River Summer Snorkel Surveys 2008

Wed, 30 Apr 2014 10:19:20 -0700

New River Summer Snorkel Surveys 2008

Wed, 30 Apr 2014 10:19:19 -0700

New River Summer Snorkel Surveys - Snorkel Surveys have been conducted with the help of various federal, state, local, tribal, and private entities on four Trinity River tributaries since 1978. Currently the California Department of Fish and Game (CaDFG) coordinates the South Fork Trinity River snorkel survey each year and the USFS coordinates the Canyon Creek, North Fork and New River snorkel surveys. Annual data gaps exist for individual tributaries and for individual years and have been noted in the "Dive Megatable" tab using the comments function. In the "Reach Megatable" tab, each survey year for each tributary, has been hyperlinked to the supporting documentation on file. Snorkel surveys are normally conducted during August of each year with the established chronological order being; Canyon Creek, North Fork Trinity River, South Fork Trinity River, and New River. Snorkel surveys are performed in 1-3 days for each tributary stream and depends on the number of participants. Snorkel surveys are performed each day by 2-4 person teams, on assigned reaches that range from 1.6 - 5.8 miles in length, in an upstream to downstream manner. Some data collected are presented in Julian Week (JW) format. Each JW is defined as one of a consecutive set of 52 weekly periods, beginning 1 January, regardless of the day of the week on which 1 January falls. The extra day during leap years is added to the 9th week, and the last day of the year is included in the 52nd week. This procedure allows inter-annual comparisons of similar weekly periods. The data in the "DFG Springer Megatable" tab, used to determine annual Trinity River Basin hatchery spawner sub-totals, natural spawner sub-totals, harvest sub-totals, and total Trinity Basin escapement totals, have been adapted from the "California Department of Fish and Game (CaDFG) Klamath River Basin Spring-run Chinook Megatable"

Trinity River Tributary Annual Summer Snorkel Survey 2009

Wed, 30 Apr 2014 10:19:19 -0700

Trinity River Tributary Annual Summer Snorkel Survey 2010

Wed, 30 Apr 2014 10:19:19 -0700

New River Snorkel Survey 2011

Wed, 30 Apr 2014 10:19:19 -0700

New River Snorkel Survey 2012

Wed, 30 Apr 2014 10:19:19 -0700

Trinity River Tributary Annual Summer Snorkel Survey 2013

Wed, 30 Apr 2014 10:19:19 -0700

Salmon River Spring Chinook and Summer Steelhead Dives 2012

Wed, 30 Apr 2014 10:19:18 -0700

Salmon River Spring Chinook and Summer Steelhead Dives - None

Salmon River Spring Chinook and Summer Steelhead Dives 2013

Wed, 30 Apr 2014 10:19:18 -0700

Salmon River Spring Chinook and Summer Steelhead Dives - None

Trinity River Tributary Annual Summer Snorkel Survey Anadromous Fish Counts

Wed, 30 Apr 2014 10:19:18 -0700

Trinity River Tributary Annual Summer Snorkel Survey - Snorkel Surveys have been conducted with the help of various federal, state, local, tribal, and private entities on four Trinity River tributaries since 1978. Currently the California Department of Fish and Game (CDFG) coordinates the South Fork Trinity River snorkel survey each year and the USFS coordinates the Canyon Creek, North Fork and New River snorkel surveys. Annual data gaps exist for individual tributaries and for individual years and have been noted in the "Dive Megatable" tab using the comments function. In the "Reach Megatable" tab, each survey year for each tributary, has been hyperlinked to the supporting documentation on file. Snorkel surveys are normally conducted during August of each year with the established chronological order being; Canyon Creek, North Fork Trinity River, South Fork Trinity River, and New River. Snorkel surveys are performed in 1-3 days for each tributary stream and depends on the number of participants. Snorkel surveys are performed each day by 2-4 person teams, on assigned reaches that range from 1.6 - 5.8 miles in length, in an upstream to downstream manner. Some data collected are presented in Julian Week (JW) format. Each JW is defined as one of a consecutive set of 52 weekly periods, beginning 1 January, regardless of the day of the week on which 1 January falls. The extra day during leap years is added to the 9th week, and the last day of the year is included in the 52nd week. This procedure allows inter-annual comparisons of similar weekly periods. The data in the "DFG Springer Megatable" tab, used to determine annual Trinity River Basin hatchery spawner sub-totals, natural spawner sub-totals, harvest sub-totals, and total Trinity Basin escapement totals, have been adapted from the "California Department of Fish and Game (CaDFG) Klamath River Basin Spring-run Chinook Megatable".

New River Summer Snorkel Surveys 2006

Wed, 30 Apr 2014 10:19:18 -0700

New River Summer Steelhead Surveys 2007

Wed, 30 Apr 2014 10:19:18 -0700

Salmon River Spring Chinook and Summer Steelhead Dives 2007, 7/25/2007

Wed, 30 Apr 2014 10:19:17 -0700

Salmon River Spring Chinook and Summer Steelhead Dives - None

Salmon River Spring Chinook and Summer Steelhead Count 2008

Wed, 30 Apr 2014 10:19:17 -0700

Salmon River Spring Chinook and Summer Steelhead Dives - None

Salmon River Spring Chinook and Summer Steelhead Dives 2009

Wed, 30 Apr 2014 10:19:17 -0700

Salmon River Spring Chinook and Summer Steelhead Dives - None

Salmon River Spring Chinook and Summer Steelhead Dives 2010

Wed, 30 Apr 2014 10:19:17 -0700

Salmon River Spring Chinook and Summer Steelhead Dives - None

Salmon River Spring Chinook and Summer Steelhead Dives 2011

Wed, 30 Apr 2014 10:19:17 -0700

Salmon River Spring Chinook and Summer Steelhead Dives - None

Spring Chinook and Summer Steelhead Count Salmon River, California, August 9 & 14, 2006

Wed, 30 Apr 2014 10:19:16 -0700

Spring Chinook and Summer Steelhead Count, Salmon River - Based on these and historic survey results, we expanded the numbers to get an estimate of what we would have found had we been able to survey our usual survey area. From the expansion equation, we get these total population estimates: Spring Chinook Total: 497 (366 adults, 131 Jacks), Summer Steelhead Total: 290 (186 adults, 104 1/2 pounders).

2011-12 Final Annual Report - Trinity River Basin Salmon and Steelhead Monitoring Project

Wed, 26 Feb 2014 09:01:17 -0800

Trinity River, CA salmon and steelhead monitoring - 2011-12 season Final annual report on monitoring projects of the Trinity River Project and lower Klamath River creel census.

2010-2011 Final Annual Report Trinity River basin salmon and steelhead monitoring report

Fri, 28 Jun 2013 09:44:06 -0700

Trinity River, CA salmon and steelhead monitoring - The distillation of the 2010-2011 sampling season data collected from the Trinity River basin

2010 Trinity River tributaries steelhead spawning survey report

Tue, 19 Mar 2013 13:05:28 -0700

Steelhead spawning survey and monitoring - This report documents the results of spawning surveys conducted by the California Department of Fish and Game on selected Trinity River tributaries from March through May of 2010. This is a continuation of spawning surveys on selected tributaries and serves to create an index of spawning steelhead abundance by enumerating redds. Between March and May 2010, we observed a total of 141 redds in 65.08 kilometers of surveyed habitat. Overall redd density for all tributaries surveyed was 2.17 redds/kilometer. The highest redd density occurred in Grass Valley Creek (4.48 redds/km), while lowest density occurred in Rusch Creek (0.51 redds/km). Redds were observed in ten creeks surveyed; Dutch, Maxwell, South Fork Indian, Weaver, East Weaver, East Fork Hayfork, Sidney Gulch, Grass Valley, Rusch, and Big Creeks. No redds were observed in Potato, Bear, Packers, and West Weaver Creeks. A total of 6 fish were observed in Dutch, Weaver, East Weaver, and East Fork Hayfork Creeks.

2009-2010 Final Annual Report Trinity River basin salmon and steelhead monitoring project

Mon, 11 Jun 2012 14:48:17 -0700

Trinity River, CA salmon and steelhead monitoring - The California Department of Fish and Game's Trinity River Project conducted tagging and recapture operations from June 2009 through March 2010 to obtain adult spring-run Chinook and fall-run Chinook salmon (Oncorhynchus tshawytscha), coho salmon (O. kisutch), and fall steelhead (O. mykiss) run-size, angler harvest, and spawner escapement estimates in the Trinity River basin. Operation of two main stem weirs and the Trinity River Hatchery are described. Additionally creel census in the Lower Klamath river and carcass survey in the upper main stem Trinity river are detailed.

Bogus Creek salmon studies 2010 - Final report

Mon, 26 Sep 2011 12:54:16 -0700

Results of salmon monitoring on Bogus Creek (Klamath Basin), CA - The California Department of Fish and Game’s (Department), Klamath River Project (KRP) operated a video fish counting facility and conducted spawning ground surveys (carcass surveys) on Bogus Creek during the Chinook salmon (Oncorhynchus tshawytscha) and coho salmon (Oncorhynchus kisutch) spawning season. The purpose of these surveys is to describe the run characteristics of adult fall-run Chinook salmon and coho salmon into Bogus Creek. Video fish counting operations began on September 7, 2010 and ended on December 14, 2010 due to forecasted high flows. The total number of Chinook salmon that entered Bogus Creek during the 2010 season is estimated to be 3,471 fish. Based on the proportion of male and female Chinook salmon that were sampled during the spawning ground surveys the run was comprised of approximately 1,534 (44.2%) males and 1,937 (55.8%) females. Based on a grilse cut off of = 61cm, adults comprised approximately 91.6% (3,179 fish) and grilse comprised 8.4% (292 fish) of the run. Males ranged in fork length from 40cm to 105cm and averaged 76.5cm. Females ranged in fork length from 55cm to 99cm and averaged 74.9cm. KRP staff estimated that 1,003 Chinook salmon (28.9%) were of hatchery origin.

Shasta River Chinook and coho observations in 2010-2011, Siskiyou County, CA

Mon, 26 Sep 2011 12:49:05 -0700

Klamath Basin salmonid monitoring, Shasta River - A total of 1,348 Chinook salmon (Chinook, Oncorhynchus tshawytscha) were estimated to have entered the Shasta River during the 2010 spawning season. An underwater video camera was operated in the flume of the Shasta River Fish Counting Facility (SRFCF) twenty four hours a day, seven days a week, from August 31, 2010 until December 17, 2010. The first Chinook was observed on September 5, 2010 and the last Chinook on December 6, 2010. KRP staff also processed a total of 25 Chinook carcasses during spawning ground surveys, and a total of 122 Chinook carcasses were collected as wash backs against the SRFCF weir during the season.

2010-11 Trinity River Trapping Summary Final DRAFT

Mon, 26 Sep 2011 12:20:24 -0700

summary of trapping efforts of Trinity River salmonids -

An estimate of angler pressure and sport fish harvest from the Klamath River between Iron Gate Dam and Dutch Creek, including data describing the size of anadromous fish spawning migrations. [1970] AFB 70-3

Fri, 24 Jun 2011 07:55:20 -0700

CalFish collection. Contact cshannon@dfg.ca.gov for assistance. - This study was conducted to obtain estimates of angler pressure, sport fish harvest and the percent of adult steelhead (Salmo gairdneri) and adult king salmon (Oncorhynchus tshawytscha) harvested by anglers. This study will be used to evaluate water projects proposed for the Klamath River System and to evaluate current management of the Klamath River aquatic resources. The study area included approximately 23.5 miles of the Klamath River in northwestern California from Iron Gate Dam downstream to the confluence of Dutch Creek. The study period extended from September 1, 1967, through August 31, 1968.A total of 58,379 angler hours were estimated to have been spent harvesting an estimated 6,710 adult steelhead, 20,062 juvenile steelhead, 314 adult king salmon, 46 juvenile king salmon, (O. kisutch), and 345 juvenile silver salmon (O. kisutch). Also harvested were an estimated 1,958 non-salmonids. Anglers harvested approximately 32 percent of the adult steelhead entering the study area (estimated 6,710 of 20,841) and about two percent of the adult king salmon entering the study area in the fall of 1967 (estimated 273 of 16,209). Of 25,688 juvenile steelhead released into the Klamath River on May 6, 1968(?), from Iron Gate Hatchery, 2869 or 11 percent were harvested by anglers within the study area. It was concluded that the sport harvest of juvenile steelhead may have an effect on the number of adult steelhead comprising future upstream migrations, and recommendations were made for further study in this area. The sport harvest of adult steelhead did not appear to be excessive because of the large numbers of these fish present during the study, however, a similar percent harvest during years when the run is small might cause a significant reduction in the numbers of adult steelhead large enough to have any significant effect on the size of future spawning migrations.

An estimate of angler pressure and sport fish harvest from the Klamath River between Iron Gate Dam and Salmon River, including data describing the size of anadromous fish spawning migrations. AFB 72-8

Fri, 24 Jun 2011 07:55:19 -0700

CalFish collection. Contact cshannon@dfg.ca.gov for assistance. - This study was conducted to obtain estimates of angler pressure, sport fish harvest and the percent of adult steelhead (Salmo gairdneri) and adult king salmon (Oncorhynchus tshawytscha) harvested by anglers. This study will be used to evaluate water projects proposed for the Klamath River system and to evaluate current management of the Klamath River aquatic resources. The study area included approximately 124 miles of the Klamath River in northwestern California from Iron Gate Dam downstream to its confluence with the Salmon River. The study period extended from September 1, 1968, through August 31, 1969. A total of a58,832 angler hours were estimated to have been spent harvesting an estimated 5,091 adult steelhead, 8,998 half-pounder steelhead, 19,911 juvenile steelhead, 1,532 adult king salmon, 57 juvenile king salmon, 10 adult silver salmon (O. kisutch), and 40 juvenile silver salmon. Also harvested were an estimated 2,360 non-salmonids. Anglers harvested approximately 19% of the adult steelhead entering the upper three sections of the study area during the fall of 1968 and spring of 1969 (estimated 2,984 of 15,873), and about 6% of the adult king salmon entering the entire study area in the fall of 1968 (estimated 1,532 of 26,539). Results indicated the number of adult salmonids harvested may be positively correlated with the number of adult salmonids in the spawning migration. Adult female steelhead and king salmon were caught in greater proportion than males of these species. Of several groups of marked juvenile steelhead released from Iron Gate Hatchery into the study area, less than 5% of any group was harvested by anglers during the study period.

Salmon of the Klamath River California, I. The Salmon and the Fishery of Klamath River. II. A Report on the 1930 Catch of King Salmon in the Klamath River. Fish Bulletin 34

Fri, 24 Jun 2011 07:55:13 -0700

CalFish collection. Contact cshannon@dfg.ca.gov for assistance. - The present paper is a digest of the work accomplished in a salmon investigation conducted under the authority of the Bureau of Commercial Fisheries of the California Division of Fish and Game. Active work was begun in 1919, and is still in progress. At the outset the investigation was so planned as to contribute as directly as possible to the solution of certain questions relating to the conservation of the fishery. The work has progressed in a fairly satisfactory way in some directions as will appear, while in others the results are not so good. The information now most needed relates to the seaward migration of young salmon, and to the relative contribution of natural and artificial propagation to the population of the river. It may seem that the matter of depletion is overstressed in this report, since its progress has been evident for years. A condition of increasing depletion was not sufficiently evident on the Klamath however, to be convincing to those most interested. In fact, opinions to the contrary were commonly held, some asserting that the "run" was not only maintaining itself but that it was gradually building up. There is very little exact information concerning fishing operations on Klamath River previous to 1912, and no really dependable statistics are available relating to the catch before that time. During the period of placer mining on the river, large numbers of salmon were speared or otherwise captured on or near their spawning beds, and if credence is given to the reports of old miners, there then appeared the first and perhaps major cause of early depletion. In 1912 three plants operated on or near the estuary and the river was heavily fished, no limit being placed on the activities of anyone. A resume of commercial fishing near the mouth or the river appears on page 88. In the collection of statistical data relating to the ocean catch of salmon, the state authorities have not been able to separate the different species. Four occur in the state, but only two species are of commercial importance-the king salmon, or Chinook, and the silver salmon or coho; hence all statistics relating to ocean fishing include both of these fishes in unknown proportions, the king salmon certainly predominating in a large measure.

Age, Growth, and Life History of Klamath Basin Steelhead (Salmo Gairdnerii) as Determined From Scale Analysis (IFD 87-)

Fri, 24 Jun 2011 07:54:58 -0700

CalFish collection. Contact cshannon@dfg.ca.gov for assistance. - Adult steelhead (Oncorhynchus mykiss irrideus) scales were analyzed from eight fall-run, two spring-run, and one winter-run stocks within the Klamath-Trinity River system, from 1981 through 1983, to provide basic information on age, growth, and life history. The higher degree of half-pounder occurrence of upper Klamath River steelhead stocks (86.7 to 100%) compared to Trinity River steelhead stocks (32.0 to 80.0%) was the major life history difference noted in scale analysis. Early life history was similar for all areas sampled with most juveniles (86.4%) remaining in freshwater during the first two years of life before migrating to sea. Repeat spawning ranged from 17.6 to 47.9% for fall-run; 40.0 to 63.6% for spring-run, and 31. 1% for winter-run steelhead. Mean length of adults at first spawning was inversely related to percent half-pounder occurrence in each stock. Ages of returning spawners, back calculated lengths at various life stages, and growth information, are presented.

2008-2009 Final Annual Report - Trinity River Basin Salmon and Steelhead Monitoring Project

Wed, 06 Apr 2011 09:10:19 -0700

Trinity River, CA salmonid monitoring - Annual report of CA DFGs salmonid monitoring efforts on the Trinity River, CA for the 2008-2009 sampling season.

Shasta River Fish Counting Facility, Chinook and coho salmon observations in 2008-2009, Siskiyou County, CA

Wed, 16 Feb 2011 11:23:34 -0800

Klamath Basin salmonid monitoring, Shasta River - Shasta River Fish Counting Facility, Chinook and coho salmon observations in 2008-2009, Siskiyou County, CA

Shasta River Fish Counting Facility, Chinook and coho salmon observations in 2007-2008, Siskiyou County, CA

Wed, 16 Feb 2011 11:21:32 -0800

Klamath Basin salmonid monitoring, Shasta River - Shasta River Fish Counting Facility, Chinook and coho salmon observations in 2007-2008, Siskiyou County, CA

Shasta River Fish Counting Facility, Chinook and coho salmon observations in 2006, Siskiyou County, CA

Wed, 16 Feb 2011 11:17:47 -0800

Klamath Basin salmonid monitoring, Shasta River - Shasta River Fish Counting Facility, Chinook and coho salmon observations in 2006, Siskiyou County, CA

Shasta River Fish Counting Facility, Chinook and coho salmon observations in 2005, Siskiyou County, CA

Wed, 16 Feb 2011 11:15:24 -0800

Klamath Basin salmonid monitoring, Shasta River - Shasta River Fish Counting Facility, Chinook and coho salmon observations in 2005, Siskiyou County, CA

Shasta River Fish Counting Facility, Chinook and coho salmon observations in 2004, Siskiyou County, CA

Wed, 16 Feb 2011 11:11:44 -0800

Klamath Basin salmonid monitoring, Shasta River - Shasta River Fish Counting Facility, Chinook and coho salmon observations in 2004, Siskiyou County, CA

Shasta River Fish Counting Facility, Chinook and coho salmon observations in 2003, Siskiyou County, CA

Wed, 16 Feb 2011 11:09:23 -0800

Klamath Basin salmonid monitoring, Shasta River - Shasta River Fish Counting Facility, Chinook and coho salmon observations in 2003, Siskiyou County, CA

Shasta River Fish Counting Facility, Chinook and coho salmon observations in 2002, Siskiyou County, CA

Wed, 16 Feb 2011 11:05:37 -0800

Klamath Basin salmonid monitoring, Shasta River - Shasta River Fish Counting Facility Chinook and coho salmon observations in 2002, Siskiyou County, CA

Summary of Chinook and coho salmon observations in 2001, Shasta River fish counting facility, Siskiyou County, CA

Wed, 16 Feb 2011 10:59:54 -0800

Klamath River salmonid monitoring, Shasta River - Summary of Chinook and coho salmon observations in 2001, Shasta River fish counting facility, Siskiyou County, CA

2004 Fall Chinook salmon run size in the Scott and Salmon Rivers and miscellaneous tributary streams in the mid-Klamath basin

Wed, 16 Feb 2011 09:53:11 -0800

Klamath basin fall Chinook salmon run size - 2004 Fall Chinook salmon run size in the Scott and Salmon Rivers and miscellaneous tributary streams in the mid-Klamath basin

2002 Fall Chinook salmon run size in the Scott and Salmon Rivers and miscellaneous tributary streams in the mid-Klamath basin

Wed, 16 Feb 2011 09:50:10 -0800

Klamath basin fall Chinook salmon run size - 2002 Fall Chinook salmon run size in the Scott and Salmon Rivers and miscellaneous tributary streams in the mid-Klamath basin

Ocean Abundance Projections and Prospective Harvest Levels for Klamath River Fall Chinook, 2010 season.

Wed, 19 Jan 2011 09:29:44 -0800

Klamath River fall Chinook ocean abundance, stock projection - The implications of the 2010 forecast ocean abundance, proportions natural, and the 2009 ocean fall harvest for fisheries management in 2010 using the Klamath Ocean Harvest Model.

Pacific Coast Salmon Plan

Wed, 19 Jan 2011 09:18:30 -0800

Fishery management plan for commercial and recreational salmon fisheries off the coasts of WA, OR, and CA - Fishery management plan for commercial and recreational salmon fisheries off the coasts of WA, OR, and CA, through Amendment 12 (adopted March 1999)

2007 Annual Report - Trinity River Basin Salmon and Steelhead Monitoring Project

Thu, 09 Dec 2010 10:57:27 -0800

Trinity River, CA salmonid monitoring - Annual report to the Bureau of Reclamation funded Trinity River Restoration Program with mainstem Trinity River monitoring study results from the 2007-2008 field season.

Klamath Salmon: Understanding allocation

Thu, 01 Jul 2010 11:49:38 -0700

Klamath salmon allocation - This document describes the history of the process whereby Klamath basin salmon are divvied up among user groups.

FINAL- 2009/10 season Trinity River Project trapping summary

Thu, 22 Apr 2010 10:57:09 -0700

Trinity River salmonid monitoring - Trapping summaries from Trinity River Project salmonid monitoring trapping efforts in 2009 / 2010 field season.

A steelhead spawning survey of the tributaries of the upper Trinity River and upper Hayfork Creek drainages, 1973.

Wed, 11 Nov 2009 07:14:47 -0800

Trinity River salmonid monitoring -

2006 Annual Report - Trinity River Basin Salmon and Steelhead Monitoring Project

Wed, 11 Nov 2009 07:14:15 -0800

Trinity River salmonid monitoring - Annual report to the Bureau of Reclamation funded Trinity River Restoration Program with mainstem Trinity River monitoring study results from the 2006-2007 field season.