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

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.

Book Addendum to FMS 16 03

Download or read book Addendum to FMS 16 03 written by Kyle Shedd and published by . This book was released on 2016 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accurate, precise 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 nonlocal stocks. Hence, the Alaska Department of Fish and Game 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 to 2016. This report describes additional baseline testing done to verify the accuracy and precision of MSA performance for Frazer and Ayakulik reporting groups given their shared ancestry and close genetic relationships. Specifically, these additional fishery scenario tests better reflect the temporal nature of KMA commercial harvest by testing MSA performance with different relative proportions of early- and late-run Ayakulik and Karluk fish. These additional fishery scenario tests indicate consistent, directional biases in the misallocation of fish between Frazer and Ayakulik. The baseline is unable to provide accurate and precise estimates of stock composition for Frazer and Ayakulik reporting groups separately, but is able to when they are combined. Thus, these 2 stocks will be combined into a composite Frazer/Ayakulik reporting group for future reporting of 2014-2016 KMA commercial harvest mixtures.

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

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.

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

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.

Book Genetic Baseline for Mixed Stock Analyses of Sockeye Salmon Harvested in Southeast Alaska for Pacific Salmon Treaty Applications  2018

Download or read book Genetic Baseline for Mixed Stock Analyses of Sockeye Salmon Harvested in Southeast Alaska for Pacific Salmon Treaty Applications 2018 written by Serena D. Rogers Olive and published by . This book was released on 2018 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sockeye salmon (Oncorhynchus nerka) are an important resource in Southeast Alaska (SEAK) and are harvested in subsistence, personal use, sport, and commercial fisheries. Commercial fisheries for sockeye salmon in SEAK have been prosecuted for over 100 years, with many fisheries harvesting mixed stocks composed of sockeye salmon originating from as far north as Prince William Sound and as far south as Washington. The Alaska Department of Fish and Game uses genetic mixed stock analysis to estimate stock compositions for harvest management and to meet Pacific Salmon Treaty obligations. This report describes the methods used to develop a genetic baseline of single nucleotide polymorphism allele frequencies to be used for genetic mixed stock analysis of sockeye salmon in SEAK fisheries. This baseline includes 28,609 individuals from 345 collections representing 238 populations in up to 9 reporting groups spanning from Prince William Sound to Washington. We used repeated 100% proof tests to measure the baseline's ability to accurately allocate mixed stock samples to reporting groups. Correct allocations in these tests ranged from 92.6% to 99.5%. The ability of this baseline to perform accurately in proof tests was due to the large amount of genetic variation found among populations both within and among the reporting groups. This baseline has been used successfully to estimate the stock composition of Pacific Salmon Treaty and domestic sockeye salmon stocks harvested in SEAK commercial fisheries.

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

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.

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

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.

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

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.

Book Genetic Mixed Stock Analysis of Sockeye Salmon Harvests in Selected Northern Chatham Strait Commercial Fisheries  Southeast Alaska  2012 2014

Download or read book Genetic Mixed Stock Analysis of Sockeye Salmon Harvests in Selected Northern Chatham Strait Commercial Fisheries Southeast Alaska 2012 2014 written by Sara Ellen Gilk and published by . This book was released on 2015 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study provides precise stock-specific estimates of harvest compositions of sockeye salmon (Oncorhynchus nerka) caught in commercial purse seine fisheries in northern Chatham Straight, Southeast Alaska.

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

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.

Book Genetic Baseline for Cook Inlet Coho Salmon and Evaluations for Mixed Stock Analysis

Download or read book Genetic Baseline for Cook Inlet Coho Salmon and Evaluations for Mixed Stock Analysis written by Andrew W. Barclay and published by . This book was released on 2019 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the updated genetic baseline for Cook Inlet coho salmon and includes new evaluations for mixed stock analysis (MSA) in Cook Inlet. Coho salmon are harvested in commercial fisheries in Upper Cook Inlet, Alaska, with an average annual harvest of 180,005 fish (2008?2017). Harvests often occur in areas where stocks intermingle, so the exploitation and productivity of individual stocks are not well known. This lack of knowledge hinders fishery management based on the sustained yield principle. Genetic analysis, using single nucleotide polymorphism (SNP) technology, can discriminate among discrete fish stocks in fishery samples when adequate stock structure exists. Here, we update a previously reported baseline of 84 populations using 86 SNP markers with an additional 10 populations and a set of 82 SNP markers included in the previous baseline to determine population structure and test potential reporting groups for MSA. Testing of potential reporting groups revealed 11 groups with adequate genetic divergence to meet the criteria for reporting groups. The data presented in this report will allow for additional baseline evaluation tests tailored for specific MSA study objectives pertinent to Cook Inlet mixed stock fisheries in the future.

Book Genetic Stock Composition of the Commercial Harvest of Sockeye Salmon in Southeastern District Mainland  Alaska Peninsula Management Area  2010 2012

Download or read book Genetic Stock Composition of the Commercial Harvest of Sockeye Salmon in Southeastern District Mainland Alaska Peninsula Management Area 2010 2012 written by Tyler H. Dann and published by . This book was released on 2012 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Southeastern District Mainland (SEDM) commercial salmon fishery occurs in the Alaska Peninsula Management Area, Westward Region, is regulated based upon a board-approved management plan, and has allocative constraints between June 1 and July 25 based upon the abundance of Chignik River sockeye salmon. Significant controversy has persisted between SEDM and Chignik Management Area fishermen concerning the estimate of Chignik-bound sockeye salmon harvested in the fishery. Western Alaska Salmon Stock Identification Program used mixed stock analysis (MSA) to determine stock of origin of sockeye (and chum salmon) in commercial and subsistence fisheries throughout Western Alaska from 2006 to 2009. As a result of low returns to the Chignik River during these years, the SEDM fishery was often closed and few samples were collected for analysis. This study was designed to fill in those holes and estimate stock proportions and stock-specific harvests of sockeye salmon sampled from the SEDM fishery.

Book Current Status of Genetic Studies of Coho Salmon from Southcentral Alaska and Evaluations for Mixed Stock Analysis in Cook Inlet

Download or read book Current Status of Genetic Studies of Coho Salmon from Southcentral Alaska and Evaluations for Mixed Stock Analysis in Cook Inlet written by Andrew W. Barclay and published by . This book was released on 2017 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the current status of genetic studies for coho salmon in Southcentral Alaska and initial evaluations for mixed-stock analysis (MSA) in Cook Inlet. Coho salmon are harvested in commercial fisheries in Upper Cook Inlet, Alaska, with an average annual harvest of 171,273 fish (2005-2014). Harvests often occur in areas where stocks intermingle, so the exploitation and productivity of individual stocks are not well known. This lack of knowledge hinders fishery management based on the sustained yield principle. Mixed-stock analysis has been used to estimate stock compositions of fishery mixtures in coho salmon elsewhere in the Pacific Northwest; however, only limited baseline existed for Cook Inlet. Within Cook Inlet, we examined a baseline of 84 populations for 86 single nucleotide polymorphism markers to examine population structure and test for potential reporting groups (stocks). From the southern edge of the Kenai Peninsula, we analyzed 3 populations to investigate the genetic legacy of stocking programs in the area. Population structure indicated that populations generally cluster by drainage, with the most genetically distinct populations in the more southerly drainages and in the upper reaches of the larger drainages. Testing of potential reporting groups revealed 7 groups with adequate genetic divergence to meet the criteria for reporting groups. Due to the sparse representation of collections in the baseline for the Yentna River drainage, additional representation within this drainage would be prudent before using it as its own reporting group in MSA. The data presented in this report will allow for additional baseline evaluation tests tailored for specific MSA study objectives pertinent to Cook Inlet mixed-stock fisheries in the future. The 3 populations from the southern edge of the Kenai Peninsula were most similar to each other, but divergent from Cook Inlet populations, suggesting little genetic introgression from stocking programs.

Book New Genetic Baseline for Upper Cook Inlet Chinook Salmon Allows for the Identification of More Stocks in Mixed Stock Fisheries

Download or read book New Genetic Baseline for Upper Cook Inlet Chinook Salmon Allows for the Identification of More Stocks in Mixed Stock Fisheries written by Andrew W. Barclay and published by . This book was released on 2019 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes an updated genetic baseline for Upper Cook Inlet Chinook salmon that allows for the identification of more stocks in mixed stock fisheries than previously possible. Chinook salmon are harvested in commercial, sport, subsistence, and personal use fisheries in Upper Cook Inlet, Alaska. Harvests often occur in areas where stocks intermingle, highlighting the need for understanding stock of origin in fishery catches to improve fishery management. Mixed stock analysis (MSA) has been used to estimate the stock composition of harvests in Cook Inlet since 2013. However, MSA applications have been limited by inadequate genetic structure, making northern Cook Inlet stocks of management and fishery importance difficult to distinguish: west Cook Inlet, Yentna River, and western Susitna stocks were indistinguishable; and eastern Susitna River and Matanuska River stocks were indistinguishable. Here we use cutting-edge genotyping by sequencing techniques to produce a baseline containing 67 Chinook salmon populations and 413 genetic markers and examine the baseline for population structure and test for potential reporting groups (stocks) using new baseline evaluation methods. Tests of potential reporting groups revealed 10 groups with adequate genetic divergence to meet the criteria for reporting groups. The 10 groups identified were (1) West, (2) Susitna, (3) Deshka, (4) Yentna, (5) Knik-Turnagain, (6) Kenai Mainstem, (7) Kenai Tributary, (8) Kasilof Mainstem, (9) Kasilof Tributary, and (10) South Kenai Pen. The data presented in this report will allow for more accurate, precise and finer-scale reporting group estimates for MSA studies in Cook Inlet and improved fisheries management.

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

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.

Book Chinook Salmon Genetics Sampling Along the Alaska Peninsula and Adjacent Areas Operational Plan  2013

Download or read book Chinook Salmon Genetics Sampling Along the Alaska Peninsula and Adjacent Areas Operational Plan 2013 written by Mark J. Witteveen and published by . This book was released on 2013 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent low runs of Chinook salmon Oncorhynchus tshawytscha in Alaska have resulted in an increased interest in developing a more comprehensive genetic baseline. A genetic baseline will allow for examination of potential impacts of fisheries on Chinook salmon stocks using mixed stock analysis. Potential hatchery contributions to fisheries will be determined using parental based tagging of Pillar Creek Hatchery Chinook salmon. There are several stocks in the Westward Region that do not have good representation in the genetic baseline, specifically on the north Alaska Peninsula and adjacent areas and near and on Kodiak Island. This document describes a plan to sample the Chinook salmon stocks in these areas to improve the genetic baseline.

Book Report to the Alaska State Legislature on Status of Cook Inlet Coho and Sockeye Salmon Genetic Projects  2014

Download or read book Report to the Alaska State Legislature on Status of Cook Inlet Coho and Sockeye Salmon Genetic Projects 2014 written by Andrew W. Barclay and published by . This book was released on 2014 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Alaska State Legislature requested a status report to the Finance Committees describing work by the Alaska Department of Fish and Game in Cook Inlet on escapement monitoring, genetics baseline data, mixed stock sampling, smolt out migration, migratory studies and habitat improvements for Chinook, coho, and sockeye salmon. This report summarizes the status of activities associated with legislative increments directed at Cook Inlet coho and sockeye salmon genetic studies conducted by the Division of Commercial Fisheries Gene Conservation Laboratory and Region II staff. For Cook Inlet coho salmon, project updates for three investigative phases are provided. In Phase I, analysis of existing samples indicated that sufficient population genetic structure exists among populations of to warrant construction of a full genetic baseline for genetic stock identification. Phase II describes the status of the genetic baseline following the second year of sampling when 3,319 fish were collected. Preliminary results using samples through 2013 indicate at least five genetic reporting groups are feasible and that additional baseline collections are be necessary before genetic stock identification can be effectively applied to Cook Inlet fishery samples. Phase III describes the status of genetic stock identification of harvests in test and commercial fisheries of Cook Inlet for the 2013-2015 seasons. To date, over 16,000 samples have been collected for future analysis from the Central District drift gill net fishery, the General and Eastern subdistrict set gill net fisheries, and the northern and southern offshore test fisheries. For sockeye salmon, we summarize the status of a project to analyze DNA from archived scales as a means to retrospectively estimate stock composition in historic Cook Inlet harvests. This is the second of a five-year project that will reconstruct Susitna River sockeye salmon escapement and total runs for the major systems in Upper Cook Inlet.