Genetic stock composition analysis of the chinook salmon (Oncorhynchus tshawytscha) bycatch from the 2016 Bering Sea walleye pollock (Gadus chalcogrammus) trawl fishery

Guthrie, Charles. M.; Nguyen, H. T. (Hanhvan T.); Thomson, A. E. (Annie. E.); Hauch, K.; Guyon, Jeffrey Robert

doi:10.7289/V5/TM-AFSC-365

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Genetic stock composition analysis of the chinook salmon (Oncorhynchus tshawytscha) bycatch from the 2016 Bering Sea walleye pollock (Gadus chalcogrammus) trawl fishery

2018
By Guthrie, Charles. M. ; Nguyen, H. T. (Hanhvan T.) ; Thomson, A. E. (Annie. E.) ; ...
Series: NOAA technical memorandum NMFS-AFSC 365

Details

Personal Author:

Guthrie, Charles. M. ; Nguyen, H. T. (Hanhvan T.) ; Thomson, A. E. (Annie. E.) ; Hauch, K. ; Guyon, Jeffrey Robert
Corporate Authors:

Alaska Fisheries Science Center (U.S.)
NOAA Program & Office:

NMFS (National Marine Fisheries Service) ; AFSC (Alaska Fisheries Science Center)
Description:

A genetic analysis of samples from the Chinook salmon (Oncorhynchus tshawytscha) bycatch of the 2016 Bering Sea-Aleutian Island (BSAI) trawl fishery for walleye pollock (Gadus chalcogrammus) was undertaken to determine the overall stock composition of the bycatch. Samples were genotyped for 43 single nucleotide polymorphism (SNP) DNA markers and results were estimated using the Alaska Department of Fish and Game (ADF&G) SNP baseline. In 2016, genetic samples from the Bering Sea were collected using a systematic random sampling protocol where one out of every 10 Chinook salmon encountered was sampled. Based on the analysis of 1,910 Chinook salmon bycatch samples collected throughout the 2016 BSAI walleye pollock trawl fishery, Coastal Western Alaska and British Columbia regions (34% and 29% respectively) dominated the sample set with smaller contributions from West Coast US (14%), and North Alaska Peninsula (13%) regions. Analysis of temporal groupings within the pollock "A" and "B" seasons revealed changes in stock composition during the course of the year with lower contributions of Coastal Western Alaska and North Alaska Peninsula regions and higher contributions of West Coast US, British Columbia, and NW Gulf of Alaska, regions during the "B" season when compared to the "A" season. . [doi:10.7289/V5/TM-AFSC-365 (https://doi.org/10.7289/V5/TM-AFSC-365)]
Content Notes:

C. M. Guthrie III, Hv. T. Nguyen, A. E. Thomson, K. Hauch, and J. R. Guyon.

"January 2018."

Includes bibliographical references (pages 25-27).
Keywords:

Bycatches Bycatches (Fisheries) Chinook Salmon Fish Stock Assessment Fish Stock Identification Genetic Aspects Sampling Walleye Pollock Fisheries Chinook Salmon Fish Stock Assessment Fish Stock Identification Genetic Aspects Walleye Pollock Fisheries
Series:

NOAA technical memorandum NMFS-AFSC 365
DOI:

http://doi.org/10.7289/V5/TM-AFSC-365
Document Type:

Technical Memorandum
Place as Subject:

Alaska ; Bering Sea Coast
Rights Information:

Public Domain
Compliance:

Submitted
Main Document Checksum:

urn:sha256:49670a8332ed4338c9eee4c009d697f92c426e952fbf0de1fb50855071ea3588
Download URL:

https://repository.library.noaa.gov/view/noaa/17118/noaa_17118_DS1.pdf
File Type:

[PDF - 4.00 MB ]

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