Chum Salmon Baseline for the Western Alaska Salmon Stock Identification Program PDF Download
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Author: Nicholas A. Decovich
Publisher:
ISBN:
Category : Chum salmon
Languages : en
Pages : 110
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Book Description
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.
Author: Nicholas A. Decovich
Publisher:
ISBN:
Category : Chum salmon
Languages : en
Pages : 110
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Book Description
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.
Author: Tyler H. Dann
Publisher:
ISBN:
Category : Fish stock assessment
Languages : en
Pages : 121
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Book Description
Uncertainty about the magnitude, frequency, location, and timing of the nonlocal harvest of sockeye and chum salmon in Western Alaska fisheries was the impetus for the Western Alaska Salmon Stock Identification Project (WASSIP). The project was designed to use genetic data in mixed stock analysis (MSA) to reduce this uncertainty. A baseline of allele frequencies is required for use in mixed stock analysis to estimate the stock of origin of harvested fish. This report describes the methodology we used to understand the population genetic structure and build a baseline for use in MSA, 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 WASSIP mixtures.
Author: William D. Templin
Publisher:
ISBN:
Category : Chum salmon
Languages : en
Pages : 133
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Book Description
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.
Author: Andrew Roy Munro
Publisher:
ISBN:
Category : Chum salmon
Languages : en
Pages : 624
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Book Description
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 in mixed stock analysis (MSA) of fisheries samples to more clearly describe harvest patterns of sockeye and chum salmon stocks in western Alaska fisheries. This report reviews the history of WASSIP, summarizes the memorandum of understanding as the guiding document for the program, and reviews participation and contributions of the Advisory Panel and Technical Committee to the program. Brief descriptions of WASSIP sockeye fisheries are provided and previous sockeye tagging and stock identification studies are reviewed. We describe the methodology used to estimate stock-specific harvests and harvest rates for sockeye salmon, report these estimates, and provide guidance on interpretation of results. These results provide the most comprehensive examination of stock-specific harvest and harvest rates across western Alaska sockeye salmon fisheries ever attempted.
Author: M. Birch Foster
Publisher:
ISBN:
Category : Chum salmon
Languages : en
Pages : 36
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Book Description
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.
Author: Douglas Murrell Eggers
Publisher:
ISBN:
Category : Chum salmon
Languages : en
Pages : 28
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Book Description
The Western Alaska Salmon Stock Identification Program (WASSIP) was initiated in 2006 with a memorandum of understanding executed by an Advisory Panel of 11 signatories, including Alaska Department of Fish and Game, and stakeholders from throughout western Alaska. The purpose of WASSIP was to identify stock contributions of sockeye (Oncorhynchus nerka) and chum salmon (O. keta) to commercial and subsistence fisheries from Chignik northward to Kotzebue Sound, and to extend those estimates to stock-specific harvest rates. This report describes the regional fishery model and estimation of escapement and harvest rates for chum salmon. Escapements and associated uncertainties were estimated for each of the WASSIP chum salmon regional reporting groups (Chignik/Kodiak, South Peninsula, Northwest District, Northern District, Coastal Western Alaska, Upper Yukon River, Kotzebue Sound; i.e., stocks). The 2007 to 2009 escapement estimates were based on information available in annual area management reports, other monitoring and assessment reports, and department databases.
Author: Alaska. Department of Fish and Game
Publisher:
ISBN:
Category : Chum salmon
Languages : en
Pages : 0
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Book Description
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.
Author: Tyler H. Dann
Publisher:
ISBN:
Category : Fish stock assessment
Languages : en
Pages : 258
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Book Description
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 in mixed stock analysis of fisheries samples to more clearly describe harvest patterns of sockeye and chum salmon stocks in western Alaska fisheries (from Chignik Area to Kuskokwim Area for sockeye salmon). Stock composition estimates for temporal strata across fisheries are required to estimate stock-specific harvest numbers and rates. This report describes the methodology used to estimate stock compositions for sockeye salmon, presents stock composition estimates, and provides guidance on how to interpret biases documented in the genetic baseline.
Author:
Publisher:
ISBN:
Category : Chum salmon
Languages : en
Pages : 237
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Book Description
The Western Alaska Salmon Stock Identification Project (WASSIP) was initiated in 2006 with a memorandum of understanding executed by an Advisory Panel of 11 signatories, including Alaska Department of Fish and Game, and stakeholders from throughout western Alaska. The Advisory Panel also includes a federal representative. The purpose of WASSIP is to provide a mechanism for participants to engage in a collaborative decision-making process to expend allocated funds for the purposes of identifying the stock contributions of western Alaska sockeye and chum salmon to fisheries in and around western Alaska. The Advisory Panel approved a catch sampling plan and the Alaska Department of Fish and Game implemented comprehensive sampling of chum Oncorhynchus keta and sockeye O. nerka salmon caught in most commercial and subsistence salmon fisheries in marine and estuarine areas of western Alaska where catches of chum or sockeye salmon occurred from 2006 to 2009. For WASSIP, western Alaska represents a broad geographic region including areas inland and within state-managed marine waters from Kilokak Rocks (eastern end of Chignik Area) southwest along the coast to Scotch Cap (Unimak Pass) and from Scotch Cap north along the coast to Point Hope (northern end of Kotzebue Area). This report summarizes results of fisheries sampling in the WASSIP area from 2006 to 2009. We include summaries of estimated catch (harvest), samples collected, and samples intended for DNA analysis by strata organized by geography, species, year, and temporally within years.
Author: Douglas Murrell Eggers
Publisher:
ISBN:
Category : Escapement (Fisheries)
Languages : en
Pages : 27
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Book Description
The Western Alaska Salmon Stock Identification Program (WASSIP) was initiated in 2006 with a memorandum of understanding executed by an Advisory Panel of 11 signatories, including Alaska Department of Fish and Game, and stakeholders from throughout western Alaska. The purpose of WASSIP was to identify stock contributions of sockeye (Oncorhynchus nerka) and chum salmon (O. keta) to commercial and subsistence fisheries from Chignik northward to Kotzebue Sound, and to extend those estimates to stock-specific harvest rates. This report describes the regional fishery model and estimation of escapement and harvest rates for sockeye salmon. Escapements and associated uncertainties were estimated for each of the WASSIP sockeye salmon regional reporting groups (Chignik, South Peninsula, North Peninsula, Bristol Bay, Kuskokwim Bay), and subregional reporting groups (i.e., stocks). The 2006 to 2008 escapement estimates were based on information available in annual area management reports, other monitoring and assessment reports, and department databases.
