Author: James William SavereidePublisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 19
Book Description
Chinook Salmon Escapement in the Gulkana River, 2005-2006
Author: James William SavereidePublisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 19
Book Description
Chinook Salmon Escapement in the Gulkana River, 2003-2004
Author: Linda J. Perry-PlakePublisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 37
Book Description
Chinook Salmon Escapement in the Gulkana River, 2007-2008
Author: Linda J. Perry-PlakePublisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 31
Book Description
Chinook Salmon Escapement in the Gulkana River, 2009
Author: Linda J. Perry-PlakePublisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 23
Book Description
Chinook Salmon Escapement in the Gulkana River, 2002
Author: Brian Daniel TarasPublisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 38
Book Description
Chinook Salmon Escapement and Run Timing in the Gulkana River, 2011-2012
Author: Scott H. MacleanPublisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 29
Book Description
Chinook Salmon Escapement and Run Timing in the Gulkana River, 2013-2015
Author: Corey J. SchwankePublisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 32
Book Description
Counting tower techniques were used to estimate Chinook salmon Oncorhynchus tshawytscha escapement at the Gulkana River for 2013, 2014 and 2015. The counting tower was located in the mainstem Gulkana River about 2.5 rkm upstream of the West Fork Gulkana River confluence. The counting tower was operational for all 3 years for the entire Chinook salmon run and a portion of the sockeye salmon O. nerka run. The estimated escapement of Chinook salmon was 3,936 (SE = 215; 95% CI = 3,515-4,357) in 2013, 3,478 (SE = 271; 95% CI = 2,947-4,009) in 2014, and 3,738 (SE = 251; 95% CI = 3,246-4,230) in 2015. These numbers do not represent total inriver escapement, just passage above the counting tower site. The date of 50th percentile passage of Chinook salmon varied from 14 July in 2013 to 5 July in 2015. The estimated escapement of sockeye salmon during the counting tower's operational period was 48,024 (SE = 1,834; 95% CI = 44,429-51,619) in 2013, 27,186 (SE = 1,236; 95% CI = 24,763-29,609) in 2014 and 24,624 (SE = 970; 95% CI = 22,723-26,525) in 2015.
Chinook Salmon Escapement and Run Timing in the Gulkana River, 2019-2021
Author: Tracy R. HansenPublisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 0
Book Description
Counting tower techniques were used to estimate Chinook salmon Oncorhynchus tshawytscha escapement in the Gulkana River during 2019, 2020, and 2021. The counting tower was located on the mainstem Gulkana River about 3.25 river kilometers upstream of the West Fork Gulkana River confluence. The estimated escapement of Chinook salmon was 8,400 (SE = 436; 95% CI = 7,546–9,254) in 2019, 2,504 (SE = 216; 95% CI = 2,080–2,928) in 2020, and 3,402 (SE = 273; 95% CI = 2,867–3,937) in 2021. These numbers do not represent total inriver escapement, just escapement above the counting tower site. The 2019 estimated escapement of Chinook salmon was the highest on record since the inception of the project in 2002, whereas the 2020 and 2021 estimated escapements were below the average for the years 2002–2018. The dates of the 25th, 50th, and 75th percentile of cumulative passage of Chinook salmon past the Gulkana River counting tower have been getting later since the project’s inception in 2002. The estimated escapement of sockeye salmon O. nerka during the counting tower’s operational period was 20,850 (SE = 661; 95% CI = 19,555–22,145) in 2019, 13,500 (SE = 574; 95% CI = 12,375–14,625) in 2020, and 13,924 (SE = 711; 95% CI = 12,531–15,317) in 2021. Counting tower operations were extended during 2019–2021 to enumerate more of the sockeye salmon return.
Creel and Escapement Estimates for Chinook Salmon on the Gulkana River, 1996
Author: Todd R. LaFlammePublisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 26
Book Description
Deshka River Chinook and Coho Salmon Escapement Studies, 2005-2014
Author: Daryl LescanecPublisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 35
Book Description
Chinook salmon (Oncorhynchus tshawytscha) and coho salmon (O. kisutch) annual escapements to the Deshka River were assessed from 2005 to 2014 to provide escapement counts and stock-specific biological information. Both Chinook and coho salmon were counted at a weir operated from approximately late May through mid-September each year, except for 2006 when coho salmon were counted through 16 August. The mean annual Chinook salmon weir count was 19,366 fish. Age composition for Chinook salmon averaged 30.8% age-1.2 fish, 50.4 % age-1.3 fish, and 16.7% age-1.4 fish. On average, females composed 48.3% of the runs. Chinook salmon run timing was consistent until 2013 and then quite variable in the last 2 years. On average, 50% (SE 8.1%) of the fish passed upstream of the weir by 20 June. Chinook salmon escapement goals were met for the years 2005-2007 and 2010-2014. The 2005-2014 mean annual coho salmon weir count was 18,684 fish. Above average coho salmon runs were observed in 2005 and 2006, whereas 2012 was the lowest count recorded since the weir was first operated in 1995. High water and a flood precluded complete coho salmon weir counts 2 of the 10 years. Coho salmon run timing was inconsistent (SD = 8 days at mean 50th percentile).