A Comprehensive Review Of Chilkat Lake And River Sockeye Salmon Stock Assessment Studies

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A Comprehensive Review of Chilkat Lake and River Sockeye Salmon Stock Assessment Studies

Author : Julie Bednarski
Publisher :
ISBN 13 :
Total Pages : 64 pages
Book Rating : 4.:/5 (19 download)

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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).

Stock Assessment Study of Chilkat Lake and River Sockeye Salmon, 2017-2020

Author : Shane R. Ransbury
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (133 download)

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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.

Stock Assessment Studies of Chilkat River Adult Sockeye and Chum Salmon Stocks in 2003 and 2004

Author : Randall L. Bachman
Publisher :
ISBN 13 :
Total Pages : 74 pages
Book Rating : 4.:/5 (621 download)

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Book Synopsis Stock Assessment Studies of Chilkat River Adult Sockeye and Chum Salmon Stocks in 2003 and 2004 by : Randall L. Bachman

Download or read book Stock Assessment Studies of Chilkat River Adult Sockeye and Chum Salmon Stocks in 2003 and 2004 written by Randall L. Bachman and published by . This book was released on 2010 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discusses the mark-recapture studies of adult Chilkat River sockeye (Oncorhynchus nerka) and chum (O. keta) salmon in 2003 and 2004 by the Alaska Department of Fish and Game and the Northern Southeastern Regional Aquaculture Association. These studies were done in order to estimate the escapement of chum and sockeye salmon in the Chilkat River, and sockeye salmon in Chilkat Lake, and to summarize age, sex, and length compositions for these populations.

Stock Assessment Studies of Chilkat River Adult Sockeye and Chum Salmon Stocks in 2002

Author : Randall L. Bachman
Publisher :
ISBN 13 :
Total Pages : 49 pages
Book Rating : 4.:/5 (613 download)

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Book Synopsis Stock Assessment Studies of Chilkat River Adult Sockeye and Chum Salmon Stocks in 2002 by : Randall L. Bachman

Download or read book Stock Assessment Studies of Chilkat River Adult Sockeye and Chum Salmon Stocks in 2002 written by Randall L. Bachman and published by . This book was released on 2005 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Operational Plan

Author : Nicole L. Zeiser
Publisher :
ISBN 13 :
Total Pages : 38 pages
Book Rating : 4.:/5 (115 download)

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Book Synopsis Operational Plan by : Nicole L. Zeiser

Download or read book Operational Plan written by Nicole L. Zeiser and published by . This book was released on 2020 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Chilkat Lake sockeye salmon (Oncorhynchus nerka) run, which spawns near Haines, is one of the largest in Southeast Alaska and contributes substantially to harvests in the District 15 commercial drift gillnet fishery in Lynn Canal. This operational plan outlines objectives, methods, and timelines for conducting sockeye salmon stock assessment designed to (1) estimate annual escapement, (2) provide information for inseason fishery management, and (3) reconstruct runs and assess stock status. The Chilkat Lake sockeye salmon run is managed for a biological escapement goal of 70,000–150,000 fish, which is enumerated with a Dual-Frequency Identification Sonar (DIDSON) system operated in conjunction with a standard picket weir located just downstream of the lake outlet. Genetic mixed stock analysis of weekly sockeye salmon harvests in the District 15 commercial drift gillnet fishery provides stock composition estimates that guide inseason management of the fishery (detailed in a separate Chilkoot Lake sockeye salmon operational plan). Biological sampling, along with escapement enumeration and stock-specific harvest data, allows for total run reconstruction required for escapement goal review. This project also supports the collection of basic limnology information at Chilkat Lake.

Rivers of North America

Author : Michael D. Delong
Publisher : Academic Press
ISBN 13 : 0128188480
Total Pages : 1109 pages
Book Rating : 4.1/5 (281 download)

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Book Synopsis Rivers of North America by : Michael D. Delong

Download or read book Rivers of North America written by Michael D. Delong and published by Academic Press. This book was released on 2023-04-20 with total page 1109 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rivers of North America, Second Edition features new updates on rivers included in the first edition, as well as brand new information on additional rivers. This new edition expands the knowledge base, providing readers with a broader comparative approach to understand both the common and distinct attributes of river networks. The first edition addressed the three primary disciplines of river science: hydrology, geomorphology, and ecology. This new edition expands upon the interactive nature of these disciplines, showing how they define the organization of a riverine landscape and its processes. An essential resource for river scientists working in ecology, hydrology, and geomorphology. Provides a single source of information on North America’s major rivers Features authoritative information on more than 200 rivers from regional specialists Includes full-color photographs and topographical maps to illustrate the beauty, major features, and uniqueness of each river system Offers one-page summaries help readers quickly find key statistics and make comparisons among rivers

Operational Plan

Author : Nicole L. Zeiser
Publisher :
ISBN 13 :
Total Pages : 48 pages
Book Rating : 4.:/5 (115 download)

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Book Synopsis Operational Plan by : Nicole L. Zeiser

Download or read book Operational Plan written by Nicole L. Zeiser and published by . This book was released on 2020 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Chilkoot Lake sockeye salmon (Oncorhynchus nerka) run, which spawns near Haines, is one of the largest in Southeast Alaska and contributes substantially to harvests in the District 15 commercial drift gillnet fishery in Lynn Canal. This operational plan outlines objectives, methods, and timelines for conducting sockeye salmon stock assessment designed to (1) estimate annual escapement and harvest, (2) provide information for inseason fishery management, and (3) reconstruct runs and assess stock status. The Chilkoot Lake run is managed for a biological escapement goal of 38,000–86,000 fish, which is enumerated through a standard picket weir located just downstream of the lake outlet. Weir counts of sockeye salmon are compared to weekly escapement targets to determine inseason run strength. Genetic mixed stock analysis of weekly sockeye salmon harvests in the District 15 commercial drift gillnet fishery provides stock composition estimates that also guide inseason management of the fishery. Biological sampling, along with escapement enumeration and stock-specific harvest data, allows for total run reconstruction required for escapement goal review.

Assessing the Production of Sockeye Salmon (Oncorhynchus Nerka) at Chilkat Lake, Southeast Alaska, Using Current Trophic Conditions and the Paleolimnologic Sediment Record

Download Assessing the Production of Sockeye Salmon (Oncorhynchus Nerka) at Chilkat Lake, Southeast Alaska, Using Current Trophic Conditions and the Paleolimnologic Sediment Record PDF Online Free

Author : David Barto
Publisher :
ISBN 13 :
Total Pages : 222 pages
Book Rating : 4.:/5 (576 download)

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Book Synopsis Assessing the Production of Sockeye Salmon (Oncorhynchus Nerka) at Chilkat Lake, Southeast Alaska, Using Current Trophic Conditions and the Paleolimnologic Sediment Record by : David Barto

Download or read book Assessing the Production of Sockeye Salmon (Oncorhynchus Nerka) at Chilkat Lake, Southeast Alaska, Using Current Trophic Conditions and the Paleolimnologic Sediment Record written by David Barto and published by . This book was released on 2004 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Anadromous sockeye salmon are the only Pacific salmon that require an extensive rearing period in a lake environment. Recent studies suggest changes in lake nutrient inputs are directly related to the magnitude of annual spawning populations (escapement), and can be quantified by sediment stable isotope analysis of nitrogen 15N). Marine nitrogen supplied by returned salmon is enriched in 15N relative to the freshwater nitrogen, which is derived from atmospheric N2 (ð15N=0 0/00). Recent (1987-1996) limnological investigations of Chilkat Lake, Alaska, matched to brood year escapement estimates, indicate that sockeye marine-derived phosphorus and nitrogen contributed up to 87% and 20%, respectively, of the lake nutrient pool. Since salmon populations fluctuate annually, the resulting marine derived nutrient (MDN) inputs and ð15N also fluctuate. Sedimentary ð15N is positively correlated (r2=0.8605, p=0.0076, df=5) with observed escapement. Additionally, ð15N is positively related to lake paleoproductivity and inversely correlated with high concentrations of CaCO3 and glacial silt. The frequency and duration of these CaCO3 inputs are believed to be the result of climate related glacial meltwater intrusions from the Tsirku River. Thus, fluctuations in MDN can be shown to influence the overall sockeye salmon production at Chilkat Lake by controlling lake productivity"--Leaf iii.

Stock Status and Escapement Goals for Chilkat Lake Sockeye Salmon in Southeast Alaska

Author : Douglas Murrell Eggers
Publisher :
ISBN 13 :
Total Pages : 48 pages
Book Rating : 4.:/5 (653 download)

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Book Synopsis Stock Status and Escapement Goals for Chilkat Lake Sockeye Salmon in Southeast Alaska by : Douglas Murrell Eggers

Download or read book Stock Status and Escapement Goals for Chilkat Lake Sockeye Salmon in Southeast Alaska written by Douglas Murrell Eggers and published by . This book was released on 2010 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Stock Assessment Study of Chilkoot Lake Sockeye Salmon, 2016-2019

Author : Shane R. Ransbury
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (133 download)

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Book Synopsis Stock Assessment Study of Chilkoot Lake Sockeye Salmon, 2016-2019 by : Shane R. Ransbury

Download or read book Stock Assessment Study of Chilkoot Lake Sockeye Salmon, 2016-2019 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 2016 to 2019, the Alaska Department of Fish and Game, Division of Commercial Fisheries, continued a stock assessment program that began 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 86,721 fish in 2016, 43,098 fish in 2017, 85,463 fish in 2018, and 140,378 fish in 2019, all of which fell within or exceeded the sustainable escapement goal range of 38,000–86,000 fish. Ocean-age-3 sockeye salmon (ages 1.3 and 2.3 combined) of both sexes were the shortest in length since scale sampling began in 1982. The stock compositions of sockeye salmon harvested annually in the District 15 commercial drift gillnet fishery were estimated through scale pattern analysis (2016) and genetic stock identification (2017–2019). Estimated commercial harvests of Chilkoot Lake sockeye salmon were 119,843 fish in 2016, 1,933 fish in 2017, 33,969 fish in 2018, and 149,586 fish in 2019. Estimated harvest rates (including subsistence and sport harvests) were 59% in 2016, 9% in 2017, 31% in 2018, and 52% in 2019. Estimated fall sockeye salmon fry populations at Chilkoot Lake were 42% above average in 2016, 45% below average in 2017, and at or slightly below average in 2018 and 2019, respectively. Average May–September zooplankton density and biomass at Chilkoot Lake were nearly double the long-term average, and zooplankton density in 2019 and biomass in 2016 were the highest recorded since sampling began in 1987.

Chilkat River Chinook Salmon Escapement Studies in 2022

Author : Brian W. Elliott
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (137 download)

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Book Synopsis Chilkat River Chinook Salmon Escapement Studies in 2022 by : Brian W. Elliott

Download or read book Chilkat River Chinook Salmon Escapement Studies in 2022 written by Brian W. Elliott and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chilkat River large (age-1.3 and older) Chinook salmon Oncorhynchus tshawytscha inriver abundance and age and sex composition will be estimated using a 2-event mark–recapture experiment in 2022. Event 1 marking is conducted in the lower Chilkat River, and event 2 recapture is conducted in principal spawning areas within the Chilkat River drainage. Data produced from this project includes estimated spawning abundance and age, sex and length compositions of the large Chinook salmon run, and when possible, estimated spawning abundance and sex and length composition of the age-1.2 Chinook salmon run in the Chilkat River drainage. The Chilkat River stock of Chinook salmon is a Pacific Salmon Commission Chinook Technical Committee exploitation rate and escapement indicator stock, and contributes toward the coastwide Chinook model used by the Pacific Salmon Commission to monitor coastwide abundance. Mark–recapture experiments of adult Chinook salmon inriver abundance have been conducted in the Chilkat River drainage since 1991 and resulting escapement estimates have had an average coefficient of variation of 16%, which contributes toward precise stock assessment production estimates for the Chilkat River Chinook stock. As part of ongoing Chilkat River Chinook salmon coded wire tag studies, all Chinook salmon encountered in the mark–recapture experiment of adult Chinook salmon inriver abundance will be examined for missing adipose fins, an indication that fish may be tagged with a coded wire tag, information that leads to estimates of juvenile production and marine harvest. These data when used in conjunction with inriver abundance allows full production estimates for the Chilkat stock.

Stikine River Sockeye Salmon Stock Assessment, 2021

Author : Julie Bednarski
Publisher :
ISBN 13 :
Total Pages : 18 pages
Book Rating : 4.:/5 (125 download)

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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.

Stock Assessment Study of Chilkoot Lake Sockeye Salmon, 2003-2015

Author : Julie L. Bednarski
Publisher :
ISBN 13 :
Total Pages : 52 pages
Book Rating : 4.:/5 (959 download)

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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.

Stock Assessment of Sockeye Salmon in the Buskin River, 2018-2021

Author : Mark J. Witteveen
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (136 download)

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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.

Hugh Smith Lake Sockeye Salmon Adult and Juvenile Studies, 2008

Author : Andrew W. Piston
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.:/5 (497 download)

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Book Synopsis Hugh Smith Lake Sockeye Salmon Adult and Juvenile Studies, 2008 by : Andrew W. Piston

Download or read book Hugh Smith Lake Sockeye Salmon Adult and Juvenile Studies, 2008 written by Andrew W. Piston and published by . This book was released on 2009 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report reviews the stock assessment and rehabilitation efforts of sockeye salmon at Hugh Smith Lake.

Stock Assessment of Sockeye Salmon in the Buskin River, 2014-2017

Author : Mark J. Witteveen
Publisher :
ISBN 13 :
Total Pages : 72 pages
Book Rating : 4.:/5 (15 download)

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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.

Hugh Smith Lake Sockeye Salmon Studies, 2012

Author : Malika T. Brunette
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.:/5 (892 download)

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Book Synopsis Hugh Smith Lake Sockeye Salmon Studies, 2012 by : Malika T. Brunette

Download or read book Hugh Smith Lake Sockeye Salmon Studies, 2012 written by Malika T. Brunette and published by . This book was released on 2013 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report reviews stock assessment and long-term population studies designed to evaluate adult sockeye salmon abundance and juvenile production at Hugh Smith Lake.