Download or read book Mixed Stock Analysis of Chinook Salmon Harvested in Southeast Alaska Commercial Troll Fisheries 2010 2014 written by Sara Ellen Gilk and published by . This book was released on 2017 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Southeast Alaska (SEAK) troll fishery harvests Chinook salmon originating from Alaska, British Columbia, and the Pacific Northwest. Owing to its mixed stock nature, the overall SEAK Chinook salmon fishery is managed as one of 3 such fisheries under provisions of the Pacific Salmon Treaty (PST) Agreement. The Alaska Department of Fish and Game has used genetic mixed stock analysis to estimate the stock composition of Chinook salmon harvested in the SEAK troll fishery since 2004 based on a genetic baseline developed by the Genetic Analysis of Pacific Salmonids group for use in PST fisheries. Genetic methods allow direct estimation of the major stock groups contributing to fisheries. This project estimated the relative stock composition of seasonal troll fishery harvests from fishery accounting years 2010 to 2014 (Oct. 1, 2009-Sept. 30, 2014). The major contributors to the Southeast Alaska troll fisheries on an annual basis are the Andrew Creek, Southern Southeast Alaska, British Columbia Coast/ Haida Gwaii, West Coast Vancouver Island, Interior Columbia River (Summer/Fall), North Oregon Coast, Washington Coast, and South Thompson reporting groups. Results indicate considerable temporal and spatial variation in the composition of troll harvests within years, but consistent patterns of composition across years. Stock composition data from this and other stock assessments are being used to provide fisheries information including stock-specific run reconstructions and forecasting of transboundary river run sizes, determining the origin of catches in the SEAK troll fishery by age to assist in evaluation of the Pacific Salmon Commission Chinook Model, and estimating some terminal run sizes of some stocks in the PST area that drive the SEAK fishery.

Download or read book Mixed Stock Analysis of Chinook Salmon Harvested in Southeast Alaska Commercial Troll Fisheries 2015 written by Sara Ellen Gilk and published by . This book was released on 2017 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Southeast Alaska (SEAK) troll fishery harvests Chinook salmon originating from Alaska, British Columbia, and the Pacific Northwest. Owing to its mixed stock nature, the overall SEAK Chinook salmon fishery is managed as 1 of 3 such fisheries under provisions of the Pacific Salmon Treaty (PST) Agreement. The Alaska Department of Fish and Game has used genetic mixed stock analysis to estimate the stock composition of Chinook salmon harvests in the SEAK commercial troll fishery since 2004 based on a genetic baseline developed by the Genetic Analysis of Pacific Salmonids group for use in PST fisheries. Genetic methods allow direct estimation of the major stock groups contributing to fisheries. This project estimated the relative stock composition of seasonal troll fishery harvests from fishery accounting year 2015 (Oct. 1, 2014 - Sept. 30, 2015). The major contributors to the Southeast Alaska troll fisheries from largest to smallest were the Interior Columbia River (Summer/Fall), Southeast Alaska/Transboundary River, North/Central British Columbia, Oregon Coast, South Thompson, Washington Coast, and West Vancouver reporting groups. Collectively, these 7 stock aggregates accounted for 91% of the harvest and are referred to as driver stocks. Results indicate considerable temporal and spatial variation in the composition of troll harvests in accounting year 2015, but consistent patterns of composition across years. Stock composition data from this and other stock assessments are being used to provide fisheries information, including stock-specific run reconstructions and forecasting of run sizes to transboundary rivers, determining the origin of catches in the SEAK troll fishery by age to assist in evaluation of the Pacific Salmon Commission Chinook Model, and estimating some terminal run sizes of stocks in the PST area that drive the SEAK fishery.

Download or read book Mixed Stock Analysis of Chinook Salmon Harvested in Southeast Alaska Commercial Troll and Sport Fisheries 2019 written by Kyle Shedd and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chinook salmon originating in Alaska, British Columbia, and the Pacific Northwest are harvested in Southeast Alaska (SEAK) commercial troll and sport fisheries. Owing to its mixed stock nature, the overall SEAK Chinook salmon fishery is managed as 1 of 3 Aggregate Abundance-Based Management (AABM) fisheries under provisions of the Pacific Salmon Treaty Agreement. The Alaska Department of Fish and Game has used genetic mixed stock analysis to estimate the stock composition of Chinook salmon harvests in the SEAK troll fisheries since 1998 and sport fisheries since 2004 based on a genetic baseline developed by the Genetic Analysis of Pacific Salmonids group for use in Pacific Salmon Treaty fisheries. Genetic methods allow direct estimation of the major stock groups contributing to these fisheries. This project estimated the relative stock composition of troll and sport fishery harvests from fishery accounting year (AY) 2019 (Oct. 1, 2018–Sept. 30, 2019). The major contributors to the troll and sport fisheries ordered from north to south were Southeast Alaska/Transboundary River, North/Central British Columbia, West Coast Vancouver Island, South Thompson, Washington Coast, Interior Columbia River summer/fall, and Oregon Coast reporting groups. Collectively, these 7 stock aggregates, referred to as driver stocks, accounted for 93% of the troll harvest and 95% of the sport harvest. The South Thompson driver stock was the largest contributor to the troll fishery (24% of the harvest), and Southeast Alaska/Transboundary River (TBR) and West Coast Vancouver Island stock groups were the largest contributors to the sport fishery (31% of the harvest each). Results indicate considerable temporal and spatial variation in the composition of troll and sport harvests in AY 2019, and changes in the relative contributions of driver stocks across years. Stock composition data from this and other stock assessments are being used to provide fisheries information, including stock-specific run reconstructions and forecasting of run sizes to transboundary rivers, and separate harvest estimates of SEAK and TBR wild and hatchery salmon.

Download or read book Mixed Stock Analysis of Chinook Salmon Harvested in Southeast Alaska Commercial Troll and Sport Fisheries 2016 written by Sara Ellen Gilk and published by . This book was released on 2018 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chinook salmon originating from Alaska, British Columbia, and the Pacific Northwest are harvested in the Southeast Alaska (SEAK) commercial troll and sport fisheries. Owing to its mixed stock nature, the overall SEAK Chinook salmon fishery is managed as 1 of 3 such fisheries under provisions of the Pacific Salmon Treaty (PST) Agreement. The Alaska Department of Fish and Game has used genetic mixed stock analysis to estimate the stock composition of Chinook salmon harvests in the SEAK troll and sport fisheries since 2004 based on a genetic baseline developed by the Genetic Analysis of Pacific Salmonids group for use in PST fisheries. This project estimated the relative stock composition of troll and sport fishery harvests from fishery accounting year (AY) 2016 (Oct. 1, 2015-Sept. 30, 2016). The major contributors to the SEAK troll and sport fisheries (from north to south) were the Southeast Alaska/Transboundary River, North/Central British Columbia, West Vancouver, South Thompson, Washington Coast, Interior Columbia River Summer/Fall (Su/F), and Oregon Coast reporting groups. Collectively, these 7 stock aggregates accounted for 90% of the troll harvest and 94% of the sport harvest, and are referred to as driver stocks. The Interior Columbia River Su/F reporting group was the largest contributor to both the troll (39%) and sport (25%) fisheries harvest. Results indicate considerable temporal and spatial variation in the composition of troll and sport harvests in AY 2016, and changes in the relative contributions of driver stocks across years. Stock composition data from this and other stock assessments provide fisheries information including stock-specific run reconstructions and forecasting transboundary river run sizes, determining the origin of SEAK troll fishery catches by age to assist in evaluation of the Pacific Salmon Commission Chinook Model, and estimating some terminal run sizes of stocks in the PST area that drive the SEAK fishery.

Download or read book Mixed Stock Analysis of Chinook Salmon Harvested in Southeast Alaska Commercial Troll and Sport Fisheries 2018 written by Kyle Shedd and published by . This book was released on 2021 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chinook salmon originating in Alaska, British Columbia, and the Pacific Northwest are harvested in Southeast Alaska (SEAK) commercial troll and sport fisheries. Owing to its mixed stock nature, the overall SEAK Chinook salmon fishery is managed as 1 of 3 aggregate abundance-based management fisheries under provisions of the Pacific Salmon Treaty Agreement. The Alaska Department of Fish and Game has used genetic mixed stock analysis to estimate the stock composition of Chinook salmon harvests in the SEAK troll and sport fisheries since 2004 based on a genetic baseline developed by the Genetic Analysis of Pacific Salmonids group for use in Pacific Salmon Treaty fisheries. Genetic methods allow direct estimation of the major stock groups contributing to these fisheries. This project estimated the relative stock composition of troll and sport fishery harvests from fishery accounting year (AY) 2018 (Oct. 1, 2017–Sept. 30, 2018). The major contributors to the troll and sport fisheries ordered from north to south were the Southeast Alaska/Transboundary River, North/Central British Columbia, West Coast Vancouver Island, South Thompson, Washington Coast, Interior Columbia River Summer/Fall, and Oregon Coast reporting groups. Collectively, these 7 stock aggregates, referred to as driver stocks, accounted for 91% of the troll harvest and 95% of the sport harvest. The Southeast Alaska/Transboundary River driver stock was the largest contributor to both the troll (18%) and sport fishery (38%) harvest. Results indicate considerable temporal and spatial variation in the composition of troll and sport harvests in AY 2018, and changes in the relative contributions of driver stocks across years. Stock composition data from this and other stock assessments are being used to provide fisheries information including stock-specific run reconstructions and forecasting of run sizes to transboundary rivers, and separate harvest estimates of SEAK and transboundary river wild and hatchery salmon.

Download or read book Mixed Stock Analysis of Chinook Salmon Harvested in Southeast Alaska Commercial Troll and Sport Fisheries 2017 written by Kyle Shedd and published by . This book was released on 2021 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chinook salmon originating from Alaska, British Columbia, and the Pacific Northwest are harvested in the Southeast Alaska (SEAK) commercial troll and sport fisheries. Owing to its mixed stock nature, the overall SEAK Chinook salmon fishery is managed as 1 of 3 aggregate abundance-based management fisheries under provisions of the Pacific Salmon Treaty (PST) Agreement. Genetic methods have been implemented in SEAK since 2004 and allow direct estimation of the major stock groups contributing to these fisheries. This project estimated the relative stock composition of SEAK troll and sport fishery harvests from fishery accounting year (AY) 2017 (October 1, 2016-September 30, 2017). The major contributors to the SEAK fisheries ordered from north to south were the Southeast Alaska/Transboundary River, North/Central British Columbia, West Vancouver, South Thompson, Washington Coast, Interior Columbia River Summer/Fall (Su/F), and Oregon Coast reporting groups. Collectively, these 7 stock aggregates, referred to as driver stocks, accounted for 89% of the troll harvest and 95% of the sport harvest. The Interior Columbia River Su/F driver stock was the largest contributor to the troll fishery (24% of the harvest), and Southeast Alaska/Transboundary River was the largest contributor to the sport fishery (28% of the harvest). Results indicate considerable temporal and spatial variation in the composition of troll and sport harvests in AY 2017 and across years. Stock composition data from this and other stock assessments are used to provide fisheries information including stock-specific run reconstructions, forecasting of run sizes to transboundary rivers, determining the origin of catches in the SEAK troll fishery by age to assist in evaluation of the Pacific Salmon Commission Chinook Model, estimating harvest of SEAK and transboundary river wild and hatchery salmon separately, and estimating some terminal run sizes of stocks in the PST area that drive the SEAK fishery. three-event mark-recapture experiment was conducted on northern pike Esox lucius in Minto Flats, Alaska from March through August 2018. Abundance was estimated for 2 specific populations: 1) an overwintering population residing in the Chatanika River upriver from its confluence with Goldstream Creek, called the Chatanika River Overwintering Area (CROA); and 2) a summer population occupying a wetland complex defined as the Minto Lakes Study Area (MLSA). Fish were sampled and marked in the CROA from 7-23 March 2018 and 12-21 June 2018 in the MLSA. Recapture events occurred in the MLSA from 12-21 June 2018 (concurrent with marking) and 7-16 August 2018. One-hundred radio tags were deployed during March 2018 to evaluate movements of northern pike relative to the mark-recapture experiment. Two models were used to estimate abundances: a traditional two-event Petersen mark-recapture model for closed populations, and a multinomial Bayesian model. The Petersen model abundance estimate of fish ≥600 mm fork length (FL) in the CROA was 14,817 (SE = 1,836) and for the MLSA was 11,956 (SE = 5,836). The Bayesian multinomial model abundance estimate for fish ≥600 mm FL in the CROA was 14,675 (SE = 1,631) and for the MLSA was 11,443 (SE = 1,651). The Bayesian multinomial model generated more precise estimates because it used data from all sampling events and incorporated information from the radiotagged fish. There were significantly more northern pike in the MLSA than what was found in 2008. Biases in the estimates were addressed and the 2 modeling approaches were evaluated. The current exploitation rate of northern pike in Minto Flats is 7.3%, which is well below the maximum threshold stipulated by the joint sport and subsistence fishery management plans.

Download or read book Mixed Stock Analysis of Chinook Salmon Harvested in Southeast Alaska Commercial Troll Fisheries 2004 2009 written by Sara Gilk-Baumer and published by . This book was released on 2013 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of the mixed stock analysis reported here was to estimate the stock composition of Chinook salmon harvests in the Southeast Alaska commercial troll fisheries 2004 and 2009.

Download or read book Mixed Stock Analysis of Chinook Salmon Harvested in the Southeast Alaska Commercial Troll Fishery 1999 2003 written by William D. Templin and published by . This book was released on 2011 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of the stock identification effort reported here was to estimate the stock composition of Chinook salmon harvested in the Southeast Alaska commercial troll fisheries between 1999 and 2003 using the available coastwide baseline of allozyme genetic markers.

Download or read book Mixed Stock Analysis of Chinook Salmon Harvested in the Southeast Alaska Sport Fishery 2004 2015 written by Sara Ellen Gilk and published by . This book was released on 2017 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chinook salmon originating from Alaska, British Columbia, and the Pacific Northwest are harvested in the Southeast Alaska sport fisheries. Information used to manage this fishery under the Pacific Salmon Treaty come from various sources including coded wire tags and escapements. Reliance on stock composition estimates from these data is problematic as coded wire tags are not applied to all stocks contributing to fisheries and estimates of escapement or run size are often not available or poorly determined. Expanding on previous work conducted on commercial harvests since 1999, the Alaska Department of Fish and Game has used genetic mixed stock analysis to estimate the stock composition of Chinook salmon harvests in the Southeast Alaska sport fishery from 2004 to 2015, based on microsatellite loci developed by the Genetic Analysis of Pacific Salmonids group for use in Pacific Salmon Treaty fisheries. Results indicate considerable spatial variation in the composition of sport harvests within years, but consistent patterns of composition across years. The major contributors to the Southeast Alaska sport fisheries on an annual basis are the Taku, Andrew, Stikine, S Southeast Alaska, West Vancouver, South Thompson, Washington Coast, and Interior Columbia Su/F reporting groups. The sport fisheries conducted within the inside waters of Southeast Alaska mainly consisted of stocks from Southeast Alaska and the transboundary Taku and Stikine rivers, while fisheries conducted in the outside waters were composed of a variety of stocks including those from British Columbia and the Pacific Northwest.

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.

Download or read book Mixed Stock Analysis of Sublegal Chinook Salmon Encountered in the Southeast Alaska Troll Fishery 2004 2007 written by William D. Templin and published by . This book was released on 2012 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of the mixed stock analysis reported here was to estimate the stock composition of sublegal-sized Chinook salmon encountered in the Southeast Alaska commercial troll fisheries during AY 2004 and 2007.

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.

Download or read book Mixed Stock Analysis of Sublegal Chinook Salmon Encountered in the Southeast Alaska Troll Fishery 1998 2003 written by William D. Templin and published by . This book was released on 2012 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of the stock identification effort reported here was to estimate the stock composition of sublegal-sized Chinook salmon encountered in the Southeast Alaska commercial troll fisheries between 1998 and 2003.

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.

Download or read book Genetic Stock Composition of the Commercial Harvest of Chinook Salmon in Copper River District 2013 2017 written by Sara Ellen Gilk and published by . This book was released on 2017 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chinook salmon are harvested in subsistence, commercial, sport, and personal use fisheries throughout the Copper River drainage and in nearshore marine waters. This project was designed to estimate the stock-specific harvest of Chinook salmon in the Copper River District commercial drift gillnet fishery using genetics samples from 2013 through 2017. The Chinook Salmon Research Initiative identified the Copper River as 1 of 12 indicator stocks representing the diverse life history and migratory characteristics of Alaska Chinook salmon. Adult abundance information was identified as a fundamental knowledge gap, including the absence of programs to estimate stock-specific harvest in mixed stock commercial fisheries. This project applied the available baseline of genetic information representing Chinook salmon populations from within the Copper River drainage, around the Gulf of Alaska, and from southern populations to estimate the relative stock compositions of Chinook salmon harvests in the Copper River District commercial fishery. The results show that most of the fish in the Copper River commercial fishery originated from Copper River populations, which is consistent with findings from previous studies. A consistent temporal pattern in the composition of the commercial fishery harvests was observed across the 5-year study. As the season progressed, the proportion of Upper Copper River Chinook salmon decreased, and the proportion of Lower Copper River Chinook salmon increased. The unusually high proportions of nonlocal Chinook salmon in the commercial harvest occurring during 2 of the study years (2014 and 2015) align with other reports of large numbers of out-of-area Chinook salmon in commercial fisheries throughout the southern and southeastern seaboards of Alaska. The results support the historical commercial management approach of providing inriver passage for all temporal components of the run. Genetic data allow for estimating the stock-specific harvests of wild stocks or stocks (with and without coded wire tags) from other areas.

Download or read book Genetic Stock Identification of Southeast Alaska Chinook Salmon Fishery Catches written by Penelope Ann Crane and published by . This book was released on 2000 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study objective was to estimate the relative contribution of genetic groups of chinook salmon sampled from the summer 1998 salmon troll fishery in Southeast Alaska.

Download or read book Mixed Stock Analysis and Age Sex and Length Composition of Chinook Salmon in the Eastside Set Gillnet Fishery in Upper Cook Inlet Alaska 2015 written by Tony Eskelin and published by . This book was released on 2016 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chinook salmon were sampled for genetic tissue and age, sex, and length (ASL) composition from the Upper Cook Inlet Eastside set gillnet (ESSN) commercial fishery in 2015. Mixed stock analysis (MSA) was conducted on tissue samples that were collected to represent the harvest by date and area. The 4 reporting groups used to apportion the Chinook salmon harvest were Kenai River mainstem, Kenai River tributaries, Kasilof River mainstem, and Cook Inlet other. In 2015, the total reported harvest was 7,781 Chinook salmon, with an estimated composition of 5,988 (77%) Kenai River mainstem, 1,564 (20.1%) Kasilof River mainstem, 211 (2.7%) Cook Inlet other, and 19 (0.2%) Kenai River tributaries stocks. Kenai River mainstem fish have composed on average 69.1% of the harvest since 2010. Nearly all the remainder of the harvest was composed of Kasilof River mainstem fish. The overall age composition of the sample was 14.2% age-1.1 fish, 37.4% age-1.2 fish, 24.3% age-1.3 fish, 23.8% age-1.4 fish, and 0.3% age-1.5 fish. The sex composition was 69% males and 31% females. Average mid eye to tail fork (METF) length of the sample was 742 mm.