Author: Mark J. Witteveen
Publisher:
ISBN:
Category : Fishery management
Languages : en
Pages : 16

Get Book Here

Book Description

Author: Mark J. Witteveen
Publisher:
ISBN:
Category : Fishery management
Languages : en
Pages : 16

Get Book Here

Book Description

Author: Penelope Ann Crane
Publisher:
ISBN:
Category : Fish populations
Languages : en
Pages : 27

Get Book Here

Book Description

Author: Michelle Stratton
Publisher:
ISBN:
Category : Escapement (Fisheries)
Languages : en
Pages : 12

Get Book Here

Book Description
This project will continue the Genetic Stock Identification (GSI) project on sockeye salmon escaping through the Chignik weir following protocol established by the Gene Conservation Laboratory (GCL) of the Alaska Department of Fish and Game (ADF&G). Concurrent with ASL sampling, 190 fish at each of 6 strata (1,140 total samples) during the transition period will have the left axillary process collected and sent to Anchorage for analysis for post-season stock apportionment of Chignik River early- and late-run sockeye salmon.

Author: Michelle Stratton
Publisher:
ISBN:
Category : Escapement (Fisheries)
Languages : en
Pages : 12

Get Book Here

Book Description
This project will continue the Genetic Stock Identification (GSI) project on sockeye salmon escaping through the Chignik weir following protocol established by the Gene Conservation Laboratory (GCL) of the Alaska Department of Fish and Game (ADF&G). Concurrent with ASL sampling, 190 fish at each of 6 strata (1,140 total samples) during the transition period will have the left axillary process collected and sent to Anchorage for analysis for post-season stock apportionment of Chignik River early- and late-run sockeye salmon.

Author: Tyler H. Dann
Publisher:
ISBN:
Category : Fish stock assessment
Languages : en
Pages : 89

Get Book Here

Book Description
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.

Author: Kyle Shedd
Publisher:
ISBN:
Category : Fish populations
Languages : en
Pages : 154

Get Book Here

Book Description
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.

Author: Kyle Shedd
Publisher:
ISBN:
Category : Fish populations
Languages : en
Pages : 233

Get Book Here

Book Description
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.

Author: Matthew R. Catterson
Publisher:
ISBN:
Category : Coho salmon
Languages : en
Pages : 0

Get Book Here

Book Description
This project is part of a multiyear effort to collect tissue samples from coho salmon Oncorhynchus kisutch populations across Southeast Alaska to create a comprehensive genetic baseline. Previous genetic tissue sampling of coho salmon in Southeast Alaska has been conducted opportunistically in conjunction with other field work. This project will add to existing sample collections, target under sampled populations, and collect genetic samples from geographic areas that have not yet been targeted. The creation of a genetic baseline for coho salmon will provide information on population differentiation to inform regulatory decisions, hatchery releases, and allow for genetic stock identification (GSI) of fishery harvests.

Author: Justin T. Priest
Publisher:
ISBN:
Category : Coho salmon
Languages : en
Pages : 9

Get Book Here

Book Description
"This project is a two-year effort to collect tissue samples from coho salmon Oncorhynchus kisutch populations across Southeast Alaska to create a more comprehensive genetic baseline. Previous genetic tissue sampling of coho salmon in Southeast Alaska has been conducted opportunistically in conjunction with other field work; this project will add to existing sample collections and target undersampled populations, with a focus on populations in transboundary rivers and the Northern Boundary Area that are managed under the Pacific Salmon Treaty. The creation of a genetic baseline for coho salmon will assist in future stock management by allowing population differentiation to inform regulatory decisions and allow for genetic stock identification (GSI) of commercial harvests."--Page 1