Download or read book Genetic Stock Composition of Chum Salmon Harvested in Commercial Salmon Fisheries of the South Alaska Peninsula 2022 2026 written by M. Birch Foster and published by . This book was released on 2022 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary goal of this study is to use mixed stock analysis to estimate the stock composition of chum salmon Oncorhynchus keta harvested in South Alaska Peninsula Management Area (southern portion of Area M) commercial salmon fisheries during the 2022 to 2026 seasons. Relatively large harvests of chum salmon in South Alaska Peninsula fisheries in recent years corresponding with small returns of chum salmon to Western Alaska rivers has raised concerns among some stakeholders about the stock-specific harvests in South Alaska Peninsula fisheries. Salmon tagging studies published in 1926, 1964, and 1991 and subsequent genetic stock identification projects conducted in 1993-1996 and 2007-2009 demonstrated significant numbers of non-local chum salmon in the June and early July commercial fisheries of the South Alaska Peninsula. Presently, some stakeholders believe that relative abundances among stocks in the fishery have changed since stock-specific chum harvests were last estimated in South Alaska Peninsula harvests as part of the Western Alaska Salmon Stock Identification Program (WASSIP) in 2007-2009. An updated study that accurately and precisely estimates stock-specific harvests would help resolve these concerns and provide valuable management information regarding the gear- and temporal-specific harvests of chum salmon in select South Peninsula fisheries. This operational plan provides the Alaska Department of Fish and Game (ADF&G) with a sampling and genetic analysis plan to achieve that overall goal.
Download or read book Preliminary Harvest Rates of Western Alaska and Alaska Peninsula Chum Salmon Stocks in South Alaska Peninsula Fisheries 2022 written by Alaska. Department of Fish and Game and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document provides preliminary harvest rate estimates of western Alaska and Alaska Peninsula stocks in the 2022 South Alaska Peninsula commercial fisheries. The methods used in the Western Alaska Salmon Stock Identification Program (WASSIP) study were followed as closely as possible and deviations are described. These results supplement previous studies and may be useful to inform fishery management and the regulatory process.
Download or read book Chum Salmon Genetic Stock Identification written by Dan Gray and published by . This book was released on 1996 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summarizes the chum salmon GSI (genetic stock identification) sampling undertaken at processing plants in King Cove and Sand Point, Alaska, in 1996.
Download or read book Genetic Analysis of Chum Salmon Harvested in the South Peninsula Post June Fishery 1996 1997 written by Penelope Ann Crane and published by . This book was released on 2000 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chum Salmon Genetic Stock Identification written by David R. Sarafin and published by . This book was released on 1995 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summarizes the chum salmon GSI (genetic stock identification) sampling undertaken at the processing plants in King Cove and Sand Point, Alaska, in 1994. Catches delivered to the former were from the South Unimak fishing ground predominantly; those to latter from the Shumagin Islands ground.
Download or read book Chum Salmon Baseline for the Western Alaska Salmon Stock Identification Program written by Nicholas A. Decovich and published by . This book was released on 2012 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Uncertainty about the magnitude, frequency, location, and timing of the nonlocal harvest of sockeye and chum salmon was the impetus for the Western Alaska Salmon Stock Identification Program. The program was designed to use genetic data in mixed stock analysis to reduce this uncertainty. A baseline of allele frequencies in spawning populations is required for use in mixed-stock analysis to estimate the stock of origin of harvested fish. This report describes the methodology used to understand the population genetic structure among chum salmon populations and to build and test a baseline for use in mixed stock analysis of chum salmon. Of the 35,921 fish from 434 collections selected to be genotyped, the final baseline was composed of 32,817 fish from 402 collections representing 310 populations. Average population sample size was 106 fish. Reporting groups were determined through a combination of stakeholder needs and identifiability using genetic information, as measured using proof tests. The final reporting groups included Asia, Kotzebue Sound, Coastal Western Alaska, Upper Yukon River, Northern District (Alaska Peninsula), Northwest District (Alaska Peninsula), South Peninsula (Alaska Peninsula), Chignik/Kodiak, and East of Kodiak.
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.
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 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 Genetic Stock Composition Analysis of Chum Salmon from the Prohibited Species Catch of the 2016 Bering Sea Walleye Pollock Trawl Fishery and Gulf of Alaska Groundfish Fisheries written by Jackie Whittle and published by . This book was released on 2018 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: A genetic analysis of the prohibited species catch (PSC) of chum salmon (Oncorhynchus keta) collected during 2016 from the federally managed walleye pollock (Gadus chalcogrammus) trawl fishery in the Bering Sea and from the federal groundfish fisheries in the Gulf of Alaska (GOA) was undertaken to determine the overall stock composition of the sample sets. Samples were genotyped for 11 microsatellite markers from which stock contributions were estimated using the current chum salmon microsatellite baseline. In 2016, one genetic sample was collected for every 30.6 chum salmon caught in the Bering Sea midwater trawl fishery. The evaluation of sampling in the Bering Sea based on time, location, and vessel indicated that the genetic samples were representative of the total chum salmon PSC in the Bering Sea. The majority of the 114 chum salmon samples from the A-season were from Northeast Asia (37%) and Eastern GOA/Pacific Northwest (PNW) (37%) stocks. Based on the analysis of 2,701 chum salmon collected throughout the B-season, the largest stock groups in the catch were Eastern GOA/PNW (35%) and Northeast Asia (31%), followed by Western Alaska (19%), Southeast Asia (9%), Upper/Middle Yukon (5%), and Southwest Alaska (
Download or read book Biochemical Genetic Stock Compositions of Chum Salmon Fisheries in Southern British Columbia 1981 1983 written by Terry Dale Beacham and published by . This book was released on 1984 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1981, a program of stock identification was undertaken inorder to provide in-season estimates of stock compositions sothat more discrete harvesting of stocks could be attempted. Themajor stocks that contribute to the commercial fisheries weresampled on the spawning grounds, and electrophotectic, meristic, and morphometric characters were surveyed from each stock. Inthe present report, the authors used the electrophoreticcharacteristics of the individual stocks that were sampled on thespawning ground to estimate stock compositions in mixedfisheries.
Download or read book Stock Composition of Sockeye and Chum Salmon Catches in Southern Alaska Peninsula Fisheries in June written by Douglas Murrell Eggers and published by . This book was released on 1991 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: Study to determine the composition of catches of salmon (sockeye, Oncorhynchus nerka and chum, Oncorhynchus keta) in the South Peninsula June fisheries (area of South Unimak Island and Shumagin Island). Estimates were made based on release and subsequent recovery for 1987 of tagged fish in western Alaska, central Alaska, and Asian terminal fishing areas.
Download or read book Genetic Analysis of Chum Salmon Harvested in the South Unimak and Shumagin Islands June Fisheries 1993 1996 written by Lisa Wishard Seeb and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Stock Composition of the Commercial Harvest of Chinook Salmon in Copper River District 2018 2021 written by Andrew W. Barclay and published by . This book was released on 2022 with total page 0 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 2018 through 2021. 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. The consistent temporal pattern in the composition of the commercial fishery harvests observed in previous studies was also observed across the 4 years of this 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 results support a 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 Differentiation of Chum Salmon Oncorhynchus Keta in Alaska Influenced by Glacial History written by Eleni L. Petrou and published by . This book was released on 2012 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: One major goal of fisheries management is to ensure the sustainable harvest of wild populations so that productivity is stable over time. Information on population structure is necessary for effective fishery management because it helps describe the appropriate spatial scale for management units, and can identify populations that are small or isolated and need protection from overharvest. Chum salmon (Oncorhynchus keta) is a species targeted by both commercial and subsistence fisheries. Estimating fine-scale population structure of chum salmon in Alaska is of increasing concern because of fluctuating census sizes, and the uncertain effects of bycatch on specific populations. In this study we examined the genetic structure of 66 chum salmon populations spawning in waterways on the Alaska Peninsula and Kodiak Island. This area was covered by the Cordilleran Ice Sheet 25,000 years before present, and spawning habitats were unavailable for salmon at this time. Thus, colonization of the region by salmon occurred relatively recently. We found that chum salmon populations on the Alaska Peninsula and Kodiak Island contain considerable genetic diversity for the species. Patterns of differentiation appear to be influenced by the geographic distance separating populations, glacial history of the region, and time since colonization. The fine-scale genetic data that we have assembled will be useful to fisheries managers as they continue to evaluate the impacts of bycatch and monitor the long-term productivity of chum salmon populations.
Download or read book Stock Composition of Chum Salmon Harvests in Fisheries of the Western Alaska Salmon Stock Identification Program WASSIP 2007 2009 written by William D. Templin and published by . This book was released on 2012 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: Uncertainty about the magnitude, frequency, location, and timing of stock-specific sockeye and chum salmon harvest in western Alaska fisheries was the impetus for the Western Alaska Salmon Stock Identification Program (WASSIP). The program was designed to use genetic data for mixed stock analysis (MSA) of fisheries samples to more clearly describe harvest patterns of chum and sockeye salmon stocks in western Alaska fisheries. Stock composition estimates for temporal strata across fisheries are required to estimate stock-specific harvest numbers and rates. This report describes the methods used to estimate stock compositions for chum salmon, presents stock composition estimates, and provides guidance on how to interpret biases documented in MSA baseline tests when evaluating stock composition estimates of WASSIP catch samples.
Download or read book Joint Chum Salmon Technical Committee Report written by Pacific Salmon Commission. Chum Salmon Technical Committee and published by . This book was released on 1992 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt:
