Details:

Personal Author:
McKelvey, Denise; Lauffenburger, N. (Nathan);
McKelvey, Denise; Lauffenburger, N. (Nathan); Less -
Corporate Authors:
Alaska Fisheries Science Center (U.S.);
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:
Scientists from the Alaska Fisheries Science Center conducted an acoustic-trawl survey in early March 2016 to estimate the abundance of pre-spawning walleye pollock (Gadus chalcogrammus) in the southeastern Aleutian Basin near Bogoslof Island. This report summarizes the observed pollock distribution and biological information, and provides an abundance estimate used for stock assessment. The estimated abundance for pollock in 2016 was 866 million fish weighing 507 thousand tons, which is a 665% increase in abundance and a 352% increase in biomass from the 2014 survey estimates. The pollock population was dominated by younger fish; 91% were less than 51 cm and 97% were less than 9 years of age. Most of the fish were from the 2009 year class, which was not a strong year class in the eastern Bering Sea or the Gulf of Alaska. Second in importance were fish from the 2012 year class, which was a strong year class in the eastern Bering Sea and the Gulf of Alaska. [doi:10.7289/V5AFSC-PR-2017-11 (https://doi.org/10.7289/V5/AFSC-PR-2017-11)]
Content Notes:
"August 2017." System requirements: Adobe Acrobat Reader. Includes bibliographical references (pages 15-19).
Keywords:
[+]
Echo Sounding In Fishing
Fish Stock Assessment
Fish Surveys
Geographical Distribution
Walleye Pollock
Walleye Pollock Fisheries

Series:
AFSC processed report ; 2017-11;
DOI:
http://doi.org/10.7289/V5/AFSC-PR-2017-11
Document Type:
Technical Report;
Place as Subject:
Aleutian Basin;
Rights Information:
Public Domain
Compliance:
Library
Main Document Checksum:
[+]
urn:sha256:c3f4811a8db99666c6774e3691a776bd8738cb901ca1650d987caab5af2ffe49
File Type:

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