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Stock Assessment Of Sockeye Salmon In The Buskin River 2010 2013
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Book Synopsis Stock Assessment of Sockeye Salmon in the Buskin River, 2010-2013 by : Tyler Polum
Download or read book Stock Assessment of Sockeye Salmon in the Buskin River, 2010-2013 written by Tyler Polum and published by . This book was released on 2014 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents 2010-2013 study results, including annual sockeye salmon escapement counts, harvests, estimates of age and sex composition and mean-length-at-age by sex, and spawner-recruitment analyses of the Buskin River, Kodiak Island, Alaska.
Book Synopsis Stock Assessment of Sockeye Salmon in the Buskin River, 2018-2021 by : Mark J. Witteveen
Download or read book Stock Assessment of Sockeye Salmon in the Buskin River, 2018-2021 written by Mark J. Witteveen and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 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.
Book Synopsis Buskin River Sockeye Salmon Stock Assessment Operational Plan, 2022 by : Kelly M. Krueger
Download or read book Buskin River Sockeye Salmon Stock Assessment Operational Plan, 2022 written by Kelly M. Krueger and published by . This book was released on 2022 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 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.
Book Synopsis Stock Assessment of Sockeye Salmon in the Buskin River, 2014-2017 by : Mark J. Witteveen
Download or read book Stock Assessment of Sockeye Salmon in the Buskin River, 2014-2017 written by Mark J. Witteveen and published by . This book was released on 2018 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 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 13,976; 8,718; 11,297; and 7,219 fish for 2014-2017, respectively. Weir counts for Lake Louise were 925, 280, 156, and 141 sockeye salmon for 2014-2017, respectively. Reported annual subsistence harvests for the Buskin River Section were 5,616; 3,920; and 4,767 sockeye salmon for 2014-2016, respectively; harvest is not available for 2017 at this time. Mixed stock analysis of genetic samples from the Buskin River sockeye salmon subsistence fishery showed 91-97% of the 2014-2017 harvests were of Buskin Lake origin sockeye salmon and 0.5-4.1% were of sockeye salmon bound for Lake Louise. In interviews conducted from 2014 through 2017, an average of 89% of subsistence users reported each year that the Buskin River was a traditional fishing location, and an average of 79% reported each year that they subsistence fished in other areas. Enumerated sockeye salmon spawning escapement for the entire drainage was 14,901; 8,998; 11,453; and 7,360 fish for 2014-2017, respectively. Based on a Bayesian spawner-recruitment analysis, estimated spawning escapement for maximum sustained yield is about 6,500 fish (95% credibility interval 5,100-8,400). A sustained yield probability analysis supports the current Buskin Lake system biological escapement goal (BEG) range of 5,000-8,000 sockeye salmon. Age-1.3, -2.2, and -2.3 sockeye salmon composed 90-99% of the subsistence harvests for 2014-2017 and composed 76-96% of the Buskin River and 50-100% of the Lake Louise escapements. Male to female ratios for the Buskin River were between 0.7 and 1.1 to 1 for 2014-2017; they were 1.3-2.5 to 1 for Lake Louise, and 0.8-1.5 to 1 for the subsistence harvest.
Book Synopsis Stock Assessment of Sockeye Salmon in the Buskin River, 2007-2009 by : Julia S. Schmidt
Download or read book Stock Assessment of Sockeye Salmon in the Buskin River, 2007-2009 written by Julia S. Schmidt and published by . This book was released on 2010 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents 2007-2009 study results, including daily and seasonal sockeye salmon escapement counts, harvests, estimates of age and sex composition and mean-length-at-age by sex, and spawner-recruitment analyses of the Buskin River, Kodiak Island, Alaska.
Book Synopsis Buskin River Sockeye Stock Assessment Operational Plan, 2023 by : Kelly M. Krueger
Download or read book Buskin River Sockeye Stock Assessment Operational Plan, 2023 written by Kelly M. Krueger and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this project is to census the sockeye salmon escapement into Buskin Lake during 2023. The age, sex, and length composition of the run (escapement and subsistence harvest combined) to Buskin Lake will also be estimated.
Book Synopsis Stock Assessment of Sockeye Salmon of the Buskin River, 2000-2003 by : Julia S. Schmidt
Download or read book Stock Assessment of Sockeye Salmon of the Buskin River, 2000-2003 written by Julia S. Schmidt and published by . This book was released on 2005 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stock Assessment of Sockeye Salmon of Buskin River, 2004-2006 by : Julia S. Schmidt
Download or read book Stock Assessment of Sockeye Salmon of Buskin River, 2004-2006 written by Julia S. Schmidt and published by . This book was released on 2007 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 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.
Book Synopsis Buskin River Sockeye Salmon Smolt Abundance Assessment, Kodiak, Alaska, 2010-2011 by : Julia S. Schmidt
Download or read book Buskin River Sockeye Salmon Smolt Abundance Assessment, Kodiak, Alaska, 2010-2011 written by Julia S. Schmidt and published by . This book was released on 2012 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 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.
Book Synopsis Stock Assessment of Sockeye Salmon from the Buskin River, Kodiak, Alaska, 2000 by : Donn Tracy
Download or read book Stock Assessment of Sockeye Salmon from the Buskin River, Kodiak, Alaska, 2000 written by Donn Tracy and published by . This book was released on 2003 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stock Assessment of Buskin River Coho Salmon, 2011-2013 by : Tyler Polum
Download or read book Stock Assessment of Buskin River Coho Salmon, 2011-2013 written by Tyler Polum and published by . This book was released on 2017 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Alaska Department of Fish and Game (ADF&G) Division of Sport Fish (SF) 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; the weir was moved to its current location in 1989. This report presents weir counts, harvest, and age-composition data collected between 2011 and 2013 as well as a spawner?recruit analysis. In 2011, the Buskin River weir count was 6,026 coho salmon; the estimated sport harvest was 3,640; the reported subsistence harvest was 287; and the commercial harvest was 197 coho salmon. Age-2.1 fish composed 72% of the total run and the male to female ratio was 1.1:1. Estimated escapement was 5,298 coho salmon. In 2012, the weir count was 5,291 coho salmon; the estimated sport harvest was 1,926; the reported subsistence harvest was 984; and the commercial harvest was 10. Age-2.1 fish composed 92% of the total run and the male to female ratio was 5.8:1. Estimated escapement was 4,906 coho salmon. In 2013, the estimated weir count was 5,959 coho salmon; the estimated sport harvest was 5,294; the reported subsistence harvest was 611; and the commercial harvest was 40. Age-2.1 fish composed 82% of the escapement and the male to female ratio was 0.93:1. Estimated escapement was 4,900 coho salmon. A full probability spawner?recruit analysis of all relevant data gave an estimated spawning escapement at maximum sustainable yield (MSY) of approximately 7,300 coho salmon (90% credibility interval of 5,140?12,000). Assuming a 10-year average sport harvest, the inriver run estimated for MSY is about 8,150 coho salmon and the estimated exploitation rate at MSY is 40%.
Book Synopsis Stikine River Sockeye Salmon Stock Assessment, 2021 by : Julie Bednarski
Download or read book Stikine River Sockeye Salmon Stock Assessment, 2021 written by Julie Bednarski and published by . This book was released on 2021 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 2021 forecast of Stikine River sockeye salmon, Oncorhynchus nerka, run abundance is poor and we anticipate very little harvesting opportunity for either U.S. or Canadian fisheries. Since 1994, we have almost exclusively relied on the Canadian lower river commercial fishery to provide the migratory timing information that is used to complete the mixed stock run reconstruction for Stikine River sockeye salmon. It is highly likely there will be no fishing opportunity in 2021 to gather this pertinent information. To obtain stock composition data necessary to estimate the inriver abundance, we are initiating a sockeye salmon stock assessment program at Kakwan Point. The project will be conducted in conjunction with the existing Stikine River Chinook salmon, O. tshwaytscha, assessment program, and will extend the project through the end of the sockeye salmon run in late August. Tissue samples will be collected from sockeye salmon for genetic mixed stock analysis and for use in a genetic mark–recapture study to estimate inriver abundance based on an expansion of the Tahltan stock that is monitored via weir. We will also gather daily catch per unit effort (CPUE) information and estimate the age, sex and length (ASL) composition for sockeye salmon captured. This stock assessment program is designed to capture sockeye salmon in proportion to abundance during immigration; therefore, it is expected that it will provide an unbiased estimate of abundance. This estimate will be assessed by TTC postseason for use in the Stikine River sockeye salmon run reconstruction.
Book Synopsis Stock Assessment of Buskin River Coho Salmon, 2014-2017 by : Michelle Stratton
Download or read book Stock Assessment of Buskin River Coho Salmon, 2014-2017 written by Michelle Stratton and published by . This book was released on 2020 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 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%.
Book Synopsis Stock Assessment of Buskin River Coho Salmon, 2018-2019 by : Kelly M. Krueger
Download or read book Stock Assessment of Buskin River Coho Salmon, 2018-2019 written by Kelly M. Krueger and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 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.
Book Synopsis A Comprehensive Review of Chilkat Lake and River Sockeye Salmon Stock Assessment Studies by : Julie Bednarski
Download or read book A Comprehensive Review of Chilkat Lake and River Sockeye Salmon Stock Assessment Studies written by Julie Bednarski and published by . This book was released on 2017 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since 1967 the Alaska Department of Fish and Game, Division of Commercial Fisheries, has operated a stock assessment program to estimate escapements and harvests of Chilkat sockeye salmon (Oncorhynchus nerka). Sockeye salmon were counted through a weir near the outlet of Chilkat Lake, and age, length, and sex data were collected and analyzed each year. Since 1994, mark-recapture studies were conducted to estimate Chilkat sockeye salmon escapements. Since the start of the 2008 season, DIDSON sonar has been used at the weir site to directly enumerate adult sockeye salmon escapement into Chilkat Lake. Visual scale pattern analysis was conducted to determine the proportion of Chilkat sockeye salmon harvested annually in the District 15 commercial drift gillnet fishery. In addition, limnological sampling was conducted in Chilkat Lake and analyzed each year. The intent of this report was to review Chilkat sockeye salmon stock assessment data from 1971 to 2016. The visual and DIDSON weir counts provide an index of escapement; however concerns regarding mark-recapture as a reliable index of abundance lead us to recommend eliminating mark-recapture studies in 2017 and, instead, maintain the DIDSON to estimate escapement into Chilkat Lake. We also recommend reviewing the current Chilkat Lake biological escapement goal to ensure that the goal and escapement estimates are in the same units, which is currently based on mark-recapture units. An average of 77,800 Chilkat Lake sockeye salmon were harvested annually in the District 15 commercial drift gillnet fishery (1976-2016). A comparison of historical fish wheel counts to Chilkat Lake escapement estimates demonstrates that the fish wheel project provides a rough indication of Chilkat Lake run strength. Zooplankton samples from Chilkat Lake were composed primarily of one species of copepod (Cyclops columbianus) and three species of cladocerans (Bosmina longerostris, Daphnia longiremus, and Daphnia rosea).
Book Synopsis Stock Assessment Study of Chilkat Lake and River Sockeye Salmon, 2017-2020 by : Shane R. Ransbury
Download or read book Stock Assessment Study of Chilkat Lake and River Sockeye Salmon, 2017-2020 written by Shane R. Ransbury and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: From 2017 to 2020, the Alaska Department of Fish and Game, Division of Commercial Fisheries, conducted stock assessment programs to estimate the escapement and harvest of Chilkat Lake sockeye salmon (Oncorhynchus nerka). Escapement was estimated with a Dual-frequency Identification Sonar (DIDSON) and weir near the outlet of Chilkat Lake, and age, length, and sex data were collected and analyzed each year. Sockeye salmon escapements, based on expanded DIDSON counts, were 88,197 fish in 2017, 108,047 fish in 2018, 136,091 fish in 2019, and 50,746 fish in 2020. Estimated escapements fell within the biological escapement goal range of 70,000–150,000 sockeye salmon in all but one year (2020). A pair of fish wheels were operated on the Chilkat River to provide inseason information on Chilkat sockeye salmon run strength to assist in management of the District 15 commercial drift gillnet fishery. Genetic stock identification was conducted to determine the stock composition of sockeye salmon harvested annually in the District 15 commercial drift gillnet fishery. Estimated commercial harvests of Chilkat Lake sockeye salmon were 5,698 fish in 2017, 19,235 fish in 2018, 40,935 fish in 2019, and 8,776 fish in 2020. Estimated annual harvest rates (not including subsistence or sport harvests) ranged from 6.1% (2017) to 23.1% (2019), and Chilkat Lake sockeye salmon accounted for an estimated 14.3% (2017) to 23.5% (2018) of the annual commercial sockeye salmon harvest in District 15. Zooplankton populations at Chilkat Lake have improved steadily since the late 2000s; historical peaks in the abundance of copepods and cladocerans (particularly Daphnia), the preferred prey of juvenile sockeye salmon, were observed in 2020 and 2019, respectively.
Book Synopsis Stock Assessment Study of Chilkoot Lake Sockeye Salmon, 2003-2015 by : Julie L. Bednarski
Download or read book Stock Assessment Study of Chilkoot Lake Sockeye Salmon, 2003-2015 written by Julie L. Bednarski and published by . This book was released on 2016 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: From 2013 to 2015, the Alaska Department of Fish and Game, Division of Commercial Fisheries, continued a stock assessment program that begun in 1976 to estimate escapements and harvests of Chilkoot Lake sockeye salmon (Oncorhynchus nerka). Sockeye salmon were counted through a weir near the outlet of Chilkoot Lake, and age, length, and sex data were collected and analyzed each year. Sockeye salmon escapements at the weir were 46,140 fish in 2013, 105,058 fish in 2014, and 71,515 fish in 2015. Visual scale pattern analysis was conducted to determine the proportion of Chilkoot sockeye salmon harvested annually in the District 15 commercial drift gillnet fishery. Estimated commercial drift gillnet harvests of Chilkoot sockeye salmon were 23,111 fish in 2013, 110,487 fish in 2014, and 33,085 fish in 2015. Estimated harvest rates were 36% in 2013, 52% in 2014, and 46% in 2015. In addition, zooplankton and hydroacoustic surveys were conducted in Chilkoot Lake and analyzed each year.
