Genetic stock composition analysis of the Chinook salmon (Oncorhynchus tshawytscha) bycatch from the 2018 Bering Sea pollock trawl fishery

Guthrie, C. M., III; Nguyen, Hv. T.; Marsh, M.; Watson, J. T.; Guyon, J. R.

doi:10.25923/s0ek-5c29

Advanced Search

Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

Advanced Search
Custom Query

All these words:

For very narrow results

This exact word or phrase:

When looking for a specific result

Any of these words:

Best used for discovery & interchangable words

None of these words:

Recommended to be used in conjunction with other fields

Language:

Dates

Publication Date Range:

to

Document Data

Title:

Document Type:

Library

Collection:

Series:

People

Author:

Clear All

Query Builder

Query box

Clear All

For additional assistance using the Custom Query please check out our Help Page

i

Genetic stock composition analysis of the Chinook salmon (Oncorhynchus tshawytscha) bycatch from the 2018 Bering Sea pollock trawl fishery

2020
By Guthrie, C. M., III ; Nguyen, Hv. T. ; Marsh, M. ; ...
Series: NOAA technical memorandum NMFS-AFSC ; 407

[PDF-1.95 MB]

Details You May Also Like

Details:

Personal Author:

Guthrie, C. M., III ; Nguyen, Hv. T. ; Marsh, M. ; Watson, J. T. ; Guyon, J. R.

Guthrie, C. M., III ; Nguyen, Hv. T. ; Marsh, M. ; Watson, J. T. ; Guyon, J. R. Less -
NOAA Program & Office:

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

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

A genetic analysis of samples from the Chinook salmon (Oncorhynchus tshawytscha) bycatch of the 2018 Bering Sea-Aleutian Island (BSAI) trawl fishery for walleye pollock (Gadus chalcogrammus) was undertaken to determine the overall stock composition of the bycatch and examine temporal changes in stock composition across seasons. 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 2018, genetic samples were collected using a systematic random sampling protocol where one out of every 10 Chinook salmon encountered was sampled. Based on analysis of 1,297 Chinook salmon bycatch samples, Coastal Western Alaska and British Columbia regions (34% and 30%, respectively) dominated the sample set with smaller contributions from North Alaska Peninsula (18%) and West Coast US (11%) regions. Temporal groupings within the pollock “A” and “B” seasons revealed changes in stock composition over the course of the year. The percentage and number of fish from the Coastal Western Alaska (35% vs. 31%) and North Alaska Peninsula (26% vs. 3%) regions was higher in the “A” season than the “B” season, whereas the contribution from the West Coast US (6% vs. 20%) and the British Columbia (27% vs. 33%) regions were higher in the “B” season. Spatial analysis showed that the stock compositions varied within season depending upon where the salmon were caught. For example, during the “B” season a higher proportion of Coastal Western Alaska Chinook salmon were intercepted in the northwestern area of the Bering Sea, and a higher proportion of southern origin Chinook salmon were intercepted in the southeastern area of the Bering Sea.
Keywords:

[+]

Bycatches Chinook Salmon Fish Stock Identification Genetic Aspects Walleye Pollock Fisheries
Series:

NOAA technical memorandum NMFS-AFSC ; 407
DOI:

https://doi.org/10.25923/s0ek-5c29
Document Type:

Technical Memorandum
Place as Subject:

Bering Sea ; Alaska ; United States

Bering Sea ; Alaska ; United States Less -
Rights Information:

Public Domain
Compliance:

Submitted
Main Document Checksum:

[+]

urn:sha256:735c0e43c07b13783861e948f544efe3d71c75d1798c1a06a1e6e4af672c1382
Download URL:

https://repository.library.noaa.gov/view/noaa/26092/noaa_26092_DS1.pdf
File Type:

No Additional Files

More +

Genetic stock composition analysis of the Chinook salmon (Oncorhynchus tshawytscha) bycatch from the 2018 Bering Sea pollock trawl fishery

Details:

Supporting Files

You May Also Like