Details:

Personal Author:
Honkalehto, Taina ; Williamson, Neal J. ; Hanson, Dale ; McKelvey, Denise ; De Blois, Stephen K.
Honkalehto, Taina ; Williamson, Neal J. ; Hanson, Dale ; McKelvey, Denise ; De Blois, Stephen K. 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 Midwater Assessment and Conservation Engineering (MACE) Program of the Alaska Fisheries Science Center (AFSC) conduct research surveys of Bering Sea walleye pollock (Theragra chalcogramma) to estimate pollock distribution and abundance. Results presented in this report are from the echo integration-trawl (EIT) survey carried out between 18 February and 11 March 2002 on the southeastern Bering Sea continental shelf and in the southeastern Aleutian Basin near Bogoslof Island (the Bogoslof Island area) aboard the NOAA ship Miller Freeman. The primary objective of the Bering Sea shelf portion of the survey was to assess the abundance and distribution of pollock inhabiting the Steller sea lion Conservation Area (SCA) east of 168OW. The primary objective of the Bogoslof portion was to assess the abundance and distribution of pre-spawning pollock in the southeastern Aleutian Basin. The biomass estimate for pollock inside the North Pacific Fishery Management Council's (NPFMC) Statistical Reporting Area 518 (Area 518; the same as the Central Bering Sea (CBS) Convention Specific Area ) obtained during this survey provides an index of abundance for Aleutian Basin pollock. The Japan Fisheries Agency also conducted an EIT survey of pollock in the southeastern Aleutian Basin between 9 February and 5 March 2002. This survey was conducted aboard the R/V Kaiyo Maru in cooperation with the United States in order to estimate distribution and abundance of pre-spawning pollock. In addition to surveying the Bogoslof Island area, they surveyed basin and slope waters north of the Aleutian Islands west of 170°W to about 176°W. Prior to the start of the U.S. survey in February, the two vessels conducted an intership calibration to compare acoustic systems. Intership calibration results will be presented in a different report. This report summarizes the U.S. EIT survey results on observed pollock distribution and biological composition, and provides abundance estimates. It also summarizes oceanographic observations and acoustic system calibration results"--Introduction.
Content Notes:
by Taina Honkalehto, Neal Williamson, Dale Hanson, Denise McKelvey, and Steve de Blois

"September 2002."

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

Includes bibliographical references (pages 15-16).


Keywords:
[+]
Echo Sounding In Fishing
Fish Populations
Fish Stock Assessment
Geographical Distribution
Measurement
Walleye Pollock
Walleye Pollock Fisheries

Series:
AFSC processed report ; 2002-02
Document Type:
Technical Report
Place as Subject:
Bering Sea
Rights Information:
Public Domain
Compliance:
Library
Main Document Checksum:
[+]
urn:sha256:43c0db4da0d350efea357a7326ca7a8019919ea2bd1c653097e55e845e3db9f9
File Type:

Supporting Files

• AFSC Processed Reports archive website

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