Stock Assessment of Sockeye Salmon from the Buskin River, Kodiak, Alaska, 2000
Author: Donn Tracy
Publisher:
Published: 2003
Total Pages: 20
ISBN-13:
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Author: Donn Tracy
Publisher:
Published: 2003
Total Pages: 20
ISBN-13:
DOWNLOAD EBOOKAuthor: Julia S. Schmidt
Publisher:
Published: 2007
Total Pages: 44
ISBN-13:
DOWNLOAD EBOOKThis report presents age, sex, length and run-size data collected between 2004 and 2006 of sockeye salmon, Oncorhynchus nerka, of the Buskin River, Kodiak Island, Alaska.
Author: Mark J. Witteveen
Publisher:
Published: 2022
Total Pages: 0
ISBN-13:
DOWNLOAD EBOOKThe Alaska Department of Fish and Game, Division of Sport Fish, has assessed the annual run of Buskin River sockeye salmon (Oncorhynchus nerka) on Kodiak Island, Alaska, since 1990. Buskin River sockeye salmon weir counts were 4,284, 12,297, 7,741, and 2,330 fish for 2018–2021, respectively. Weir counts for Lake Louise were 83, 73, 53, and 1,896 sockeye salmon for 2018–2021, respectively. Reported annual subsistence harvests for the Buskin River Section were 474, 836, and 1,620 sockeye salmon for 2018–2020, respectively; accurate harvest is not available for 2021 at this time. In interviews conducted with 11 subsistence users in 2019, 100% reported that the Buskin River was a traditional fishing location, and 73% reported that they subsistence fished in other areas. Interviews were not conducted in 2018 due to a low run or in 2020 and 2021 due to COVID-19. Enumerated sockeye salmon spawning escapement for the entire drainage (Buskin Lake and Louise Lake weirs) was 4,367, 12,370, 7,794, and 4,226 fish for 2018–2021, respectively. Based on a Bayesian spawner–recruitment analysis of the Buskin Lake system, estimated spawning escapement for maximum sustained yield is about 5,700 fish (95% credibility interval = 4,300–8,000). A sustained yield probability analysis supports the current Buskin Lake system biological escapement goal (BEG) range of 5,000–8,000 sockeye salmon. Age-1.2, -1.3, -2.2, and -2.3 sockeye salmon composed 93–99% of the Buskin River run. Male to female ratios for the Buskin River were between 0.6 and 1.1 to 1 for 2018–2021. Samples taken from the Lake Louise sockeye salmon run and the subsistence harvest were too low to provide reliable estimates of age and sex composition.
Author: Kelly M. Krueger
Publisher:
Published: 2022
Total Pages: 21
ISBN-13:
DOWNLOAD EBOOKThe goal of this project is to census the sockeye salmon escapement into Buskin Lake during 2022. The age, sex, and length composition of the run (escapement and subsistence harvest combined) to Buskin Lake will also be estimated.
Author: Julia S. Schmidt
Publisher:
Published: 2012
Total Pages: 55
ISBN-13:
DOWNLOAD EBOOKIn 2010, the Alaska Department of Fish and Game, Division of Sport Fish, initiated a 2-year study to evaluate the feasibility of annually estimating the total abundance of sockeye salmon smolt (Oncorhynchus nerka) emigrating from the Buskin River drainage in the Kodiak Management Area. This report presents data collected during the 2010 and 2011 study years, in which smolt counts were obtained using floating incline plane and modified Canadian fan trap designs. Total abundance was assessed using census counts, mark-recapture experiments, and genetics-based mixed stock analysis.
Author: Julia S. Schmidt
Publisher:
Published: 2012
Total Pages: 34
ISBN-13:
DOWNLOAD EBOOKThis report presents the 2005-2007 study results of annual coho salmon runs in the Buskin River on Kodiak Island. The assessment includes monitoring the commercial, sport and subsistence harvests, and the inriver run at a weir located in the lower Buskin River.
Author: Kelly M. Krueger
Publisher:
Published: 2023
Total Pages: 0
ISBN-13:
DOWNLOAD EBOOKThe Alaska Department of Fish and Game, Division of Sport Fish has used a weir to assess the annual runs of coho salmon (Oncorhynchus kisutch) to the Buskin River on Kodiak Island since 1985. This report presents weir counts, harvest, and age-composition data collected for 2018 and 2019. In 2018, the inriver run estimate was 4,523 fish; the estimated sport and subsistence harvests were 1,793 fish and 1,171 fish, respectively, and the commercial harvest was zero. The estimated escapement was 4,164 coho salmon. Age-2.1 fish composed an estimated 78.9% of the inriver run and the male-to-female ratio was 2.4:1. In 2019, the inriver run estimate was 5,537 fish; the estimated sport and subsistence harvests were 934 fish and 340 fish, respectively, and the commercial harvest was zero. The estimated escapement was 5,350 coho salmon. Age-2.1 fish composed 52.3% of the inriver run and the male-to-female ratio was 1.1:1.
Author: Julia S. Schmidt
Publisher:
Published: 2014
Total Pages: 42
ISBN-13:
DOWNLOAD EBOOKThis report presents the 2008-2010 study results of annual coho salmon runs in the Buskin River on Kodiak Island. The assessment includes monitoring the commercial, sport and subsistence harvests, and the inriver run at a weir located in the lower Buskin River.
Author: Julia S. Schmidt
Publisher:
Published: 2011
Total Pages: 65
ISBN-13:
DOWNLOAD EBOOKThis report presents 1989-2004 study results of annual coho salmon runs in the Buskin River on Kodiak Island. The assessment includes monitoring the commercial, sport, and subsistence harvests, and the inriver run at a weir located in the lower Buskin River. Age-sex data have also been collected from a variety of sources, including egg-take events at Buskin Lake, the sport fish harvest, and occasionally at the weir.
Author: Michelle Stratton
Publisher:
Published: 2020
Total Pages: 58
ISBN-13:
DOWNLOAD EBOOKThe Alaska Department of Fish and Game, Division of Sport Fish has assessed the annual runs of coho salmon (Oncorhynchus kisutch) to the Buskin River on Kodiak Island since 1985 via a weir on the Buskin River. This report presents weir counts, harvest, and age-composition data collected between 2014 and 2017, as well as a spawner–recruit analysis for Buskin River coho salmon. In 2014, the lower weir count was 8,413; the estimated sport, subsistence, and commercial harvests were 5,388, 1,529, and 1 fish, respectively; estimated escapement was 7,335; age-2.1 fish composed 82.8% of the inriver run; and the male to female ratio was 1.9:1. In 2015, a complete lower weir count was not possible due to low water and late run timing. The estimated sport, subsistence, and commercial harvests were 4,889, 884, and 13, respectively. Only 5 fish were aged in 2015; sex and length were probably not sampled representatively due to the timing of sampling. In 2016, the estimated lower weir count was 2,513; the estimated sport, subsistence, and commercial harvests were 1,895, 496, and zero, respectively; estimated escapement was 2,134 coho salmon; age-2.1 fish composed 89.7% of the inriver run; and the male to female ratio was 1.2:1. In 2017, the estimated lower weir count was 5,559 fish; the estimated sport, subsistence, and commercial harvests were 2,337, 300, and zero, respectively; estimated escapement was 5,092; age-2.1 fish composed 66.8% of the inriver run; and the male to female ratio was 1.1:1. A Bayesian full probability spawner–recruit analysis of all relevant data gave an estimated spawning escapement at maximum sustainable yield (MSY) of approximately 7,000 coho salmon (90% credibility interval of 4,800–13,350). Assuming a 10-year average sport harvest (781 fish), the inriver run estimated for MSY is about 6,220 coho salmon; the estimated exploitation rate at MSY is 41%.