Results of the March 2009 echo integration-trawl survey of walleye pollock (Theragra chalcogramma) conducted in the southeastern Aleutian Basin near Bogoslof Island, cruise DY2009-03

McKelvey, Denise

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Results of the March 2009 echo integration-trawl survey of walleye pollock (Theragra chalcogramma) conducted in the southeastern Aleutian Basin near Bogoslof Island, cruise DY2009-03

[PDF-1.07 MB]

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Details:

Personal Author:

McKelvey, Denise
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 Midwater Assessment and Conservation Engineering (MACE) Program of the Alaska Fisheries Science Center (AFSC) regularly conduct echo integration-trawl (EIT) surveys in late February and early March to estimate pre-spawning walleye pollock (Theragra chalcogramma) abundance in the southeastern Aleutian Basin (Honkalehto et al. 2008). These surveys were conducted annually between 1988 and 2007 (with the exception of 1990 and 2004), and biennially starting in 2009. The biomass estimate for walleye pollock within the Central Bering Sea (CBS) Convention Specific Area obtained during these surveys provides an index of abundance for the Aleutian Basin walleye pollock stock. This report summarizes observed walleye pollock distribution and biological information from the winter 2009 EIT survey, and provides an abundance estimate. It also summarizes physical oceanographic observations and acoustic system calibration results.
Content Notes:

by Denise McKelvey.

"October 2009."

Also available online in PDF format via AFSC and the NOAA Central Library.

Includes bibliographical references (pages 11-12).
Keywords:

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Echo Sounding In Fishing Fish Populations Fish Stock Assessment Geographical Distribution Measurement Walleye Pollock Walleye Pollock Fisheries
Series:

AFSC processed report ; 2009-05
Document Type:

Technical Report
Place as Subject:

Bering Sea
Rights Information:

Public Domain
Compliance:

Library
Main Document Checksum:

[+]

urn:sha256:b62fcb5a8e49e24eeb9798464c0b8605a21a7893956bd53db643516629d71cf4
Download URL:

https://repository.library.noaa.gov/view/noaa/11980/noaa_11980_DS1.pdf
File Type:

AFSC Processed Reports archive website

htm

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