Annual Genetic Stock Composition Estimates For The Upper Cook Inlet Sockeye Salmon Commercial Fishery 2005 2016

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Annual Genetic Stock Composition Estimates for the Upper Cook Inlet Sockeye Salmon Commercial Fishery, 2005-2016

Author : Andrew W. Barclay
Publisher :
ISBN 13 :
Total Pages : 15 pages
Book Rating : 4.:/5 (11 download)

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Book Synopsis Annual Genetic Stock Composition Estimates for the Upper Cook Inlet Sockeye Salmon Commercial Fishery, 2005-2016 by : Andrew W. Barclay

Download or read book Annual Genetic Stock Composition Estimates for the Upper Cook Inlet Sockeye Salmon Commercial Fishery, 2005-2016 written by Andrew W. Barclay and published by . This book was released on 2017 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: In December of 2016, ADF&G released a report that used genetic MSA to estimate the stock composition and stock-specific harvest of commercial sockeye salmon harvests in the Kodiak Management Area (KMA) from 2014 to 2016 (Shedd et al. 2016). The results were originally presented to the Alaska Board of Fisheries at the KMA meeting in January, 2017, and then again at the UCI meeting in February, 2017. Nonlocal harvest of Cook Inlet sockeye salmon in KMA commercial salmon fisheries from 2014 to 2016 was substantial, but varied in magnitude both spatially and temporally (Shedd et al. 2016). Given the level of nonlocal harvest of Cook Inlet sockeye salmon, the Alaska Board of Fisheries asked ADF&G to further separate genetic estimates of Cook Inlet harvest into 4 subregional reporting groups: Kenai, Kasilof, Susitna, and Other Cook Inlet. ADF&G is preparing and will release this analysis as an addendum to the Shedd et al. (2016) report. In June of 2017, the Kodiak Fisheries Work Group requested from ADF&G overall stock-specific harvest estimates from all UCI sockeye salmon commercial fishery harvests that have been analyzed to date, including unpublished estimates from 2012 to 2016. The request included a table of stock-specific harvest estimates for the total UCI sockeye salmon commercial fishery in each year and a stacked bar plot of the estimates. This report serves 2 purposes: 1) it provides the Kodiak Fisheries Work Group with the data they requested, and 2) it is a medium for making currently unpublished estimates publicly available.

Genetic Stock Identification of Upper Cook Inlet Sockeye Salmon Harvest, 2012-2013

Author : Andrew W. Barclay
Publisher :
ISBN 13 :
Total Pages : 62 pages
Book Rating : 4.:/5 (18 download)

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Book Synopsis Genetic Stock Identification of Upper Cook Inlet Sockeye Salmon Harvest, 2012-2013 by : Andrew W. Barclay

Download or read book Genetic Stock Identification of Upper Cook Inlet Sockeye Salmon Harvest, 2012-2013 written by Andrew W. Barclay and published by . This book was released on 2017 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mixed stock analysis based on genetic data has been used to estimate the stock compositions of sockeye salmon Oncorhynchus nerka harvested in commercial fisheries in Upper Cook Inlet (UCI), Alaska, since 2005. Here we report the genetic mixed stock analysis samples representing 99% of the 2012 and 2013 UCI commercial fishery harvests. Postseason analyses were performed using a previously reported baseline of 69 populations and 96 single nucleotide polymorphic markers, with the addition of 2 populations in the West reporting group (Harriet Creek and Packers Lake late run). Stock composition patterns in the commercial fishery were similar to previous years: eastern fisheries generally captured more Kenai and Kasilof rivers fish than western and northern fisheries; and gillnet fisheries closer to the Kenai or Kasilof river mouths harvested larger proportions of fish from those rivers. In 2012, however, the majority of Kasilof fish were harvested in the drift gillnet fisheries due to restrictions on the set gillnet fishery. Most stocks contributed similar proportions to the overall harvest in the UCI fishery compared to previously reported years, but Fish and Kasilof stocks were 38-86% below average and Susitna/Yentna River stocks were 19-77% above average. In 2013, 2 additional drift gillnet samples were analyzed to compare harvests in the Kenai and Kasilof expanded corridor (July 11) with the districtwide harvest (July 8). Kenai and Kasilof estimates were higher in the corridor sample than the districtwide sample, whereas estimates for the remaining reporting groups were generally lower, but these differences were not significant and could be attributed to the difference in sampling date. Estimates of stock-specific harvests for UCI commercial fisheries in 2012 and 2013 build upon previous years in refining understanding of productivity and the effect of management actions on the stock composition of commercial sockeye salmon harvests.

Genetic Mixed Stock Analysis of Upper Cook Inlet Sockeye Salmon Harvest, 2014

Author : Andrew W. Barclay
Publisher :
ISBN 13 :
Total Pages : 34 pages
Book Rating : 4.:/5 (112 download)

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Book Synopsis Genetic Mixed Stock Analysis of Upper Cook Inlet Sockeye Salmon Harvest, 2014 by : Andrew W. Barclay

Download or read book Genetic Mixed Stock Analysis of Upper Cook Inlet Sockeye Salmon Harvest, 2014 written by Andrew W. Barclay and published by . This book was released on 2018 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Genetic mixed stock analysis has been used to estimate the stock compositions of sockeye salmon Oncorhynchus nerka harvested in commercial fisheries in Upper Cook Inlet (UCI), Alaska, since 2005. Here we report the genetic mixed stock analysis of samples representing 90.5% of the 2014 UCI commercial fishery harvests. Postseason analyses were performed using a previously reported baseline of 69 populations and 96 single nucleotide polymorphic markers, with the addition of 2 populations in the West reporting group (Harriet Creek and Packers Lake late run). Some stock composition patterns in the commercial fishery were similar to previous years. Drift gillnet and eastern fisheries captured greater proportions of Kenai and Kasilof rivers fish than western and northern fisheries; western set gillnet fisheries harvested a greater proportion of fish from the west side of Cook Inlet, but the drift gillnet fishery harvested greater numbers of west side fish; set gillnet fisheries closer to the Kenai or Kasilof river mouths harvested larger proportions of fish from those rivers; and set gillnet fishing areas in the Northern District generally harvested fish from nearby rivers. Unexpectedly, Susitna River fish made up a higher fraction of the drift gillnet harvest when the fleet was restricted to eastern Cook Inlet waters than when they were not restricted to eastern waters. Estimates of stock-specific harvests for UCI commercial fisheries in 2014 build upon previous years in refining understanding of productivity and the effect of management actions on the stock composition of commercial sockeye salmon harvests.

Genetic Mixed Stock Analysis of Upper Cook Inlet Coho Salmon Harvest, 2016

Author : Andrew W. Barclay
Publisher :
ISBN 13 :
Total Pages : 71 pages
Book Rating : 4.:/5 (114 download)

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Book Synopsis Genetic Mixed Stock Analysis of Upper Cook Inlet Coho Salmon Harvest, 2016 by : Andrew W. Barclay

Download or read book Genetic Mixed Stock Analysis of Upper Cook Inlet Coho Salmon Harvest, 2016 written by Andrew W. Barclay and published by . This book was released on 2018 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coho salmon support important commercial and sport fisheries in Upper Cook Inlet. The Upper Cook Inlet commercial fishery harvests an average of 167,372 fish annually (2007?2016). Genetic mixed stock analysis of coho salmon harvested in test and commercial drift and set gillnet fisheries of Upper Cook Inlet was first reported for 2013?2015 harvests. Here we report genetic mixed stock analysis results for the 2016 Upper Cook coho salmon harvest. Both spatial and temporal patterns in stock composition were observed in the offshore test fishery transect: higher proportions of Turnagain/Northeast CI on the Western end and Susitna and Knik on the Eastern end, and higher proportions of Turnagain/Northeast CI and Susitna in early July and Knik in late July. Samples represented 84% of the commercial coho salmon harvest in Upper Cook Inlet. Northern Cook Inlet coho salmon stocks Northwest CI/Yentna, Susitna, and Knik made up the majority of the harvest. In August in the Central District drift gillnet fishery, proportions of Northwest CI/Yentna increased and Susitna and Knik coho salmon decreased. In the Northern District set gillnet harvest, after about August 8, Northwest CI/Yentna, Susitna, and Knik stock proportions decreased and proportions of Turnagain/Northeast CI coho salmon increased. General Subdistrict (south) harvests were dominated by Susitna and Northwest CI/Yentna, General Subdistrict (north) harvests were dominated by Knik, and Eastern Subdistrict harvests were dominated by Turnagain/Northeast CI coho salmon. These and future Cook Inlet coho salmon commercial stock composition estimates will aid in the development of brood tables to establish escapement goals using spawner-recruit analysis, and provide data for annual run forecasts.

Genetic Stock Identification of Upper Cook Inlet Sockeye Salmon Harvest, 2009

Author : Andrew W. Barclay
Publisher :
ISBN 13 :
Total Pages : 54 pages
Book Rating : 4.:/5 (78 download)

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Book Synopsis Genetic Stock Identification of Upper Cook Inlet Sockeye Salmon Harvest, 2009 by : Andrew W. Barclay

Download or read book Genetic Stock Identification of Upper Cook Inlet Sockeye Salmon Harvest, 2009 written by Andrew W. Barclay and published by . This book was released on 2010 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reports on mixed-stock analysis based on genetic data which was used to estimate the stock compositions of sockeye salmon (Oncorhynchus nerka) harvested in commercial fisheries in upper Cook Inlet, Alaska.

Genetic Stock Identification of Upper Cook Inlet Sockeye Salmon Harvest, 2010

Author : Andrew W. Barclay
Publisher :
ISBN 13 :
Total Pages : 55 pages
Book Rating : 4.:/5 (894 download)

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Book Synopsis Genetic Stock Identification of Upper Cook Inlet Sockeye Salmon Harvest, 2010 by : Andrew W. Barclay

Download or read book Genetic Stock Identification of Upper Cook Inlet Sockeye Salmon Harvest, 2010 written by Andrew W. Barclay and published by . This book was released on 2013 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reports on mixed-stock analysis based on genetic data which was used to estimate the stock compositions of sockeye salmon (Oncorhynchus nerka) harvested in commercial fisheries in upper Cook Inlet, Alaska.

Genetic Stock Identification of Upper Cook Inlet Coho Salmon Harvest, 2013-2015

Author : Andrew W. Barclay
Publisher :
ISBN 13 :
Total Pages : 132 pages
Book Rating : 4.:/5 (16 download)

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Book Synopsis Genetic Stock Identification of Upper Cook Inlet Coho Salmon Harvest, 2013-2015 by : Andrew W. Barclay

Download or read book Genetic Stock Identification of Upper Cook Inlet Coho Salmon Harvest, 2013-2015 written by Andrew W. Barclay and published by . This book was released on 2017 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coho salmon support important fisheries in Upper Cook Inlet. The commercial fishery harvests an average of 170,410 fish annually (2006-2015) during their homeward migration, but little is known about stock contributions. Without stock-specific harvest information, the exploitation and productivity of stocks cannot be estimated, limiting management based on sustained yield. Here we report the genetic mixed stock analysis of coho salmon harvested in the 2013-2015 test and commercial drift and set gillnet fisheries of Upper Cook Inlet. Analyses were performed using a previously reported baseline of 84 populations and 86 SNP markers. No consistent spatial or temporal patterns were observed in the stock compositions of either the southern or northern offshore test fisheries across years. However, within years, the stock compositions of the 2 test fisheries were similar. Samples from the commercial coho salmon fisheries in Upper Cook Inlet represented 77-86% of the harvest. Northern Cook Inlet coho salmon stocks (Northwest CI/Yentna, Susitna, and Knik) made up the majority of the harvest and we found several consistent temporal and spatial patterns of stock compositions within the commercial fishery across all 3 years. In the Central District drift gillnet fishery, stock proportions were fairly consistent within years until August, when proportions of Northwest CI/Yentna increased in tandem with fishery restrictions. In the Northern District set gillnet harvest, Northern stock proportions decreased and proportions of Turnagain/Northeast CI coho salmon increased after about August 12; General Subdistrict (south) harvests were dominated by Susitna and Northwest CI/Yentna coho salmon, General Subdistrict (north) harvests were dominated by Knik, and Eastern Subdistrict harvests were dominated by Turnagain/Northeast CI coho salmon. These and future Cook Inlet coho salmon commercial stock composition estimates will aid in the development of brood tables, provide for development of coho salmon escapement goals using spawner-recruit analysis, and provide data for annual run forecasts.

Genetic Stock Identification of Upper Cook Inlet Sockeye Salmon Harvest, 2005-2008

Author : Andrew W. Barclay
Publisher :
ISBN 13 :
Total Pages : 109 pages
Book Rating : 4.:/5 (621 download)

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Book Synopsis Genetic Stock Identification of Upper Cook Inlet Sockeye Salmon Harvest, 2005-2008 by : Andrew W. Barclay

Download or read book Genetic Stock Identification of Upper Cook Inlet Sockeye Salmon Harvest, 2005-2008 written by Andrew W. Barclay and published by . This book was released on 2010 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report updates previously reported analyses of genetic population structure and mixed-stock analysis of sockeye salmon, Oncorhynchus nerka, originating from all major spawning systems and harvested in commercial fisheries in Upper Cook Inlet, Alaska.

Genetic Stock Identification of Upper Cook Inlet Sockeye Salmon Harvest, 2011

Author : Andrew W. Barclay
Publisher :
ISBN 13 :
Total Pages : 60 pages
Book Rating : 4.:/5 (94 download)

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Book Synopsis Genetic Stock Identification of Upper Cook Inlet Sockeye Salmon Harvest, 2011 by : Andrew W. Barclay

Download or read book Genetic Stock Identification of Upper Cook Inlet Sockeye Salmon Harvest, 2011 written by Andrew W. Barclay and published by . This book was released on 2014 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reports on mixed-stock analysis based on genetic data which was used to estimate the stock compositions of sockeye salmon (Oncorhynchus nerka) harvested in commercial fisheries in upper Cook Inlet, Alaska.

Genetic Stock Identification of Upper Cook Inlet Sockeye Salmon Harvest, 2020

Author : Andrew W. Barclay
Publisher :
ISBN 13 :
Total Pages : 42 pages
Book Rating : 4.:/5 (127 download)

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Book Synopsis Genetic Stock Identification of Upper Cook Inlet Sockeye Salmon Harvest, 2020 by : Andrew W. Barclay

Download or read book Genetic Stock Identification of Upper Cook Inlet Sockeye Salmon Harvest, 2020 written by Andrew W. Barclay and published by . This book was released on 2021 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report includes stock composition and stock-specific harvest estimates for 2020 Central District set and drift gillnet fisheries and Northern District set gillnet fishery for the following 8 reporting groups: (1) the largest producer of sockeye salmon on the west side of Cook Inlet (Crescent River; Crescent); (2) the remaining West Cook Inlet producers (West); (3) the lakes monitored by weirs in the Susitna/Yentna Rivers (Judd/Chelatna/Larson lakes) with the addition of the Mama and Papa Bear Lakes and Talkeetna Sloughs population (JCL); (4) the remaining producers in the Susitna/Yentna Rivers (SusYen); (5) the only major creek monitored with a weir in the Knik/Turnagain/Northeast Cook Inlet area (Fish Creek; Fish); (6) the remaining Knik/Turnagain/Northeast Cook Inlet producers (KTNE); (7) the composite of all populations within the Kenai River (Kenai); and (8) the composite of all populations within the Kasilof River (Kasilof).

Addendum to FMS 16-10: Redefinition of Reporting Groups to Separate Cook Inlet Into Four Groups for the Genetic Stock Composition of the Commercial Harvest of Sockeye Salmon in Kodiak Management Area, 2014-2016

Download Addendum to FMS 16-10: Redefinition of Reporting Groups to Separate Cook Inlet Into Four Groups for the Genetic Stock Composition of the Commercial Harvest of Sockeye Salmon in Kodiak Management Area, 2014-2016 PDF Online Free

Author : Kyle Shedd
Publisher :
ISBN 13 :
Total Pages : 118 pages
Book Rating : 4.:/5 (12 download)

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Book Synopsis Addendum to FMS 16-10: Redefinition of Reporting Groups to Separate Cook Inlet Into Four Groups for the Genetic Stock Composition of the Commercial Harvest of Sockeye Salmon in Kodiak Management Area, 2014-2016 by : Kyle Shedd

Download or read book Addendum to FMS 16-10: Redefinition of Reporting Groups to Separate Cook Inlet Into Four Groups for the Genetic Stock Composition of the Commercial Harvest of Sockeye Salmon in Kodiak Management Area, 2014-2016 written by Kyle Shedd and published by . This book was released on 2017 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: We conducted a study using mixed stock analysis (MSA) based on genetic data to estimate the stock compositions of sockeye salmon harvests in select Kodiak Management Area (KMA) commercial salmon fisheries from June through August from 2014 to 2016. This information was presented to the Alaska Board of Fisheries (BOF) in January 2017. This study showed that nonlocal harvest of Cook Inlet-origin sockeye salmon occurred in all 3 years, amounting to 8%, 37%, and 30% of the sampled KMA sockeye salmon harvest. The BOF asked the Alaska Department of Fish and Game to further separate Cook Inlet harvest into 4 subregional reporting groups: Kenai, Kasilof, Susitna, and Other Cook Inlet. This addendum to the original study describes additional genetic baseline testing done to verify the accuracy and precision of MSA performance for the 4 Cook Inlet subregional reporting groups and the stock-specific harvest results for the 34 of 47 spatiotemporal strata where Cook Inlet-origin fish contributed greater than 5% of the harvest. In each of the 3 years, the majority of the harvest of Cook Inlet sockeye salmon in the KMA came from the Kenai subregional reporting group. Annual stock compositions of the sampled KMA sockeye harvest ranged from 4.0-21.4% for Kenai, 1.7-6.1% for Kasilof, 0.3-4.4% for Susitna, and 0.8-4.7% for the Other Cook Inlet reporting group.

Genetic Stock Composition of the Commercial Harvest of Sockeye Salmon in Kodiak Management Area, 2014-2016

Author : Kyle Shedd
Publisher :
ISBN 13 :
Total Pages : 154 pages
Book Rating : 4.:/5 (989 download)

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Book Synopsis Genetic Stock Composition of the Commercial Harvest of Sockeye Salmon in Kodiak Management Area, 2014-2016 by : Kyle Shedd

Download or read book Genetic Stock Composition of the Commercial Harvest of Sockeye Salmon in Kodiak Management Area, 2014-2016 written by Kyle Shedd and published by . This book was released on 2016 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: The commercial salmon fishery in the Kodiak Management Area (KMA), Westward Region, is regulated by 10 board-approved management plans intended to preserve traditional harvest opportunities while maintaining the biological integrity of KMA (local) salmon stocks and alleviating allocative concerns. Precise, accurate estimates of stock-specific harvests of sockeye salmon (Oncorhynchus nerka) are lacking for commercial fisheries in KMA. Such information would be useful for reconstructing runs, building accurate brood tables to define escapement goals, and refining management by identifying spatial and temporal harvest patterns of local and nonlocal stocks. Genetic samples were collected for mixed stock analysis (MSA) to estimate the stock compositions of sockeye salmon harvests in select KMA commercial salmon fisheries from June through August from 2014 to 2016. A total of 45,165 sockeye salmon tissue samples were collected from 6 sampling areas in KMA. Of these, 18,558 samples were ultimately genotyped to represent 47 spatiotemporal strata. Stock compositions were estimated with MSA for all strata using a comprehensive, coastwide sockeye salmon baseline with important local stocks defined as separate reporting groups. Local, Kodiak sockeye salmon contributed 88%, 58%, and 58% of the annual KMA harvests sampled for MSA during 2014--2016 (excluding harvests after August 29, or outside of the areas sampled). During this period, there was significant, nonlocal harvest of Cook Inlet sockeye salmon in all 3 years, containing 8%, 37%, and 30% of the sampled KMA harvest, as well as harvest of Chignik sockeye salmon in 2016, containing 10% of the sampled KMA harvest. These results provide the most comprehensive estimates of stock composition and stock-specific harvests of sockeye salmon in KMA, supplement previous studies, and should inform fishery management, regulatory, and policy decision makers.

Genetic Stock Composition of the Commercial and Sport Harvest of Chinook Salmon in Westward Region, 2014-2016

Author : Kyle Shedd
Publisher :
ISBN 13 :
Total Pages : 169 pages
Book Rating : 4.:/5 (99 download)

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Book Synopsis Genetic Stock Composition of the Commercial and Sport Harvest of Chinook Salmon in Westward Region, 2014-2016 by : Kyle Shedd

Download or read book Genetic Stock Composition of the Commercial and Sport Harvest of Chinook Salmon in Westward Region, 2014-2016 written by Kyle Shedd and published by . This book was released on 2016 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary goal of this study was to estimate the stock of origin, age, size, and sex composition of Chinook salmon, Oncorhynchus tshawytscha, harvested in Westward Region commercial and Kodiak area sport fisheries during 2014--2016 as part of the larger statewide Chinook Salmon Research Initiative. Chinook salmon commercial and sport harvest in the Kodiak area were sampled from 2014 to 2016; however, budgetary constraints limited sampling of North Peninsula, South Peninsula, and Chignik commercial harvest to 2014. A total of 10,154 Chinook salmon tissue samples were collected from 4 commercial fishery areas and sport fisheries in the Kodiak area. Of these, 8,829 samples were genotyped to represent 25 spatiotemporal strata. Stock compositions were estimated with genetic mixed stock analysis for all strata using a comprehensive, coastwide Chinook salmon baseline with important local stocks defined as separate reporting groups, to the extent possible. Harvests in both the commercial and marine sport fisheries were dominated by British Columbia and West Coast U.S. stocks, followed by smaller contributions from Southeast Alaska/Northeast Gulf of Alaska, Cook Inlet, and Kodiak. Stock composition estimates were consistent among strata within commercial and marine sport harvests, although there were differences between these fisheries. In the annual commercial harvest, over 50% of the fish were from British Columbia and over 30% of the fish were from the West Coast U.S. In the marine sport fishery, the relative abundance of British Columbia and West Coast U.S. fish varied, but jointly represented over 80% of annual harvest. In both the commercial and sport fisheries, the annual harvest of Kodiak-origin Chinook salmon was below 5% of the total harvest. These results provide the most comprehensive estimates of stock composition and stock-specific harvests of Chinook salmon in the Kodiak area, supplement previous studies, and should inform fishery management and regulatory decision makers.

Post-season Stock Composition Analysis of Upper Cook Inlet Sockeye Salmon Harvest, 2005-2007

Author :
Publisher :
ISBN 13 :
Total Pages : 74 pages
Book Rating : 4.:/5 (2 download)

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Book Synopsis Post-season Stock Composition Analysis of Upper Cook Inlet Sockeye Salmon Harvest, 2005-2007 by :

Download or read book Post-season Stock Composition Analysis of Upper Cook Inlet Sockeye Salmon Harvest, 2005-2007 written by and published by . This book was released on 2008 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report discusses genetic data that were collected from sockeye salmon, Oncorhynchus nerka, originating from all major systems in upper Cook Inlet, Alaska, that produce sockeye salmon.

Genetic Baseline of North American Sockeye Salmon for Mixed Stock Analyses of Kodiak Management Area Commercial Fisheries, 2014-2016

Download Genetic Baseline of North American Sockeye Salmon for Mixed Stock Analyses of Kodiak Management Area Commercial Fisheries, 2014-2016 PDF Online Free

Author : Kyle Shedd
Publisher :
ISBN 13 :
Total Pages : 233 pages
Book Rating : 4.:/5 (951 download)

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Book Synopsis Genetic Baseline of North American Sockeye Salmon for Mixed Stock Analyses of Kodiak Management Area Commercial Fisheries, 2014-2016 by : Kyle Shedd

Download or read book Genetic Baseline of North American Sockeye Salmon for Mixed Stock Analyses of Kodiak Management Area Commercial Fisheries, 2014-2016 written by Kyle Shedd and published by . This book was released on 2016 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: Precise, accurate estimates of stock-specific harvests of sockeye salmon (Oncorhynchus nerka) are lacking for commercial fisheries in the Kodiak Management Area (KMA. Such information would be useful for reconstructing runs, building accurate brood tables to define escapement goals, and refining management by identifying spatial and temporal harvest patterns of local and non-local stocks. Hence, the department developed a genetic baseline for mixed-stock analysis (MSA) to estimate the stock compositions of sockeye salmon harvests in select KMA commercial salmon fisheries from 2014-2016. This report describes the methodology used to build a baseline, examines costs and benefits of a reduced marker set, describes the performance of the baseline for MSA, and provides guidance on how to interpret biases documented in the MSA tests when evaluating future stock composition estimates of KMA fishery mixtures. This genetic baseline uses single nucleotide polymorphism (SNP) markers and builds on the Western Alaska Salmon Stock Identification Project (WASSIP) sockeye salmon baseline to include additional populations in KMA and extends coverage south from Cape Suckling, Alaska to the Columbia River, Washington. The final baseline contains 65,332 individuals from 762 collections representing 473 populations in 15 reporting groups. Mean population sample size was 138 individuals. We used 2 types of tests to measure the baseline’s ability to correctly allocate to reporting groups: 100% proof tests and fishery scenario tests. Correct allocations for 100% proof tests averaged 98.2%, ranged from 80.4% to 99.6%, and 73 of the 75 proof tests met our goal of 90% correct allocation. Fishery scenario tests did not indicate any consistent directional biases among reporting groups, but misallocation was observed between Frazer and Ayakulik. Reducing the baseline from 96 to 48 SNPs had negligible effects on MSA estimates. This baseline will provide accurate and precise estimates of stock composition in KMA sockeye salmon fisheries.

Coded Wire Tag Augmented Genetic Mixed Stock Analysis of Chinook Salmon Harvested in Cook Inlet Marine Sport Fishery, 2014-2017

Author : Andrew W. Barclay
Publisher :
ISBN 13 :
Total Pages : 58 pages
Book Rating : 4.:/5 (114 download)

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Book Synopsis Coded Wire Tag Augmented Genetic Mixed Stock Analysis of Chinook Salmon Harvested in Cook Inlet Marine Sport Fishery, 2014-2017 by : Andrew W. Barclay

Download or read book Coded Wire Tag Augmented Genetic Mixed Stock Analysis of Chinook Salmon Harvested in Cook Inlet Marine Sport Fishery, 2014-2017 written by Andrew W. Barclay and published by . This book was released on 2019 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chinook salmon Oncorhynchus tshawytscha stocks support important fisheries in Cook Inlet, Alaska. Many Chinook salmon stocks in Alaska have been in decline since 2007. Stock-specific harvest of Chinook salmon in the Cook Inlet marine sport fishery was identified as one of many information gaps hindering an understanding of the reasons for these declines. Here we report genetic baseline evaluation tests for mixed stock analysis and select mixed stock analysis results using genetic and coded wire tag data (gcMSA) from Chinook salmon harvested in the Cook Inlet marine sport fishery from 2014 to 2017. Results of the baseline tests indicated adequate genetic variation to distinguish among 4 reporting groups of interest to management (Outside CI, Northern CI, Kenai, and S. Kenai Pen.). The gcMSA results were obtained from 4,780 Chinook salmon sampled from the Cook Inlet marine sport fishery. Stock composition and stock-specific harvests were estimated for the Upper Cook Inlet early fishery and Lower Cook Inlet summer and winter fisheries for all 4 years and Upper Cook Inlet late fishery for 2016 and 2017 only. The Outside CI reporting group dominated all fisheries. The contribution of Cook Inlet Chinook salmon stocks was greatest in Upper Cook Inlet and ranged from 10.1% to 24.7% in the early fishery and from 3.5% to 18.0% in the late fishery. In Lower Cook Inlet, Cook Inlet stocks contributed 1.0 to 3.9% in the summer fishery and less than 1.0% of the harvest in the winter fishery in all 4 years.

Genetic Stock Composition of the Commercial Harvest of Sockeye Salmon in Bristol Bay, Alaska, 2009

Author : Tyler H. Dann
Publisher :
ISBN 13 :
Total Pages : 80 pages
Book Rating : 4.:/5 (754 download)

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Book Synopsis Genetic Stock Composition of the Commercial Harvest of Sockeye Salmon in Bristol Bay, Alaska, 2009 by : Tyler H. Dann

Download or read book Genetic Stock Composition of the Commercial Harvest of Sockeye Salmon in Bristol Bay, Alaska, 2009 written by Tyler H. Dann and published by . This book was released on 2011 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Bristol Bay Management Area supports the largest sockeye salmon Oncorhynchus nerka fishery in the world. Alaska Department of Fish and Game is responsible for managing fisheries under the sustained-yield principle. Sockeye salmon stocks in Bristol Bay can be exploited at rates up to 80%, so accurately estimating the stock composition of catch is critical to determining the total run (catch and escapement) of each stock. Accurate estimates of total runs are vital for managing under the sustained-yield principle because they provide the basis for establishing and meeting escapement goals. In recent years, the department has developed a genetics program for sockeye salmon in Bristol Bay to develop and apply genetics methods to identify the stock composition of commercial catch in the five commercial fishing districts. Here we present genetic results from 2009, compare them to results from 2006 through 2008, and to those based on traditional age-based methods"--P. 1.