Details:

Alternative Title:
2011 Gulf of Alaska bottom trawl survey
Personal Author:
Raring, Nate W. ; Laman, Edward A. ; Von Szalay, Paul G. (Paul Gunnar) ; Martin, Michael Hall
Raring, Nate W. ; Laman, Edward A. ; Von Szalay, Paul G. (Paul Gunnar) ; Martin, Michael Hall 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 of the Groundfish Assessment Program of Alaska Fisheries Science Center's Resource Assessment and Conservation Engineering (RACE) Division conducted the seventh biennial groundfish assessment survey of the Gulf of Alaska during the summer of 2011. These surveys extend the series of surveys, previously conducted every 3 years between 1984 and 1999, which constitute the time series used in stock assessments of Gulf of Alaska groundfish resources. The survey area covered the continental shelf and upper continental slope to 700 m in the Gulf of Alaska from Islands of Four Mountains (170° W long.) and continued eastward approximately 2,800 km across the Gulf of Alaska to Dixon Entrance (133° 25' W long.). The survey was conducted aboard two chartered commercial trawlers, the FV Ocean Explorer and the FV Sea Storm. Trawl haul samples were successfully collected at 670 survey stations using standard RACE Division Poly Nor'Eastern high-opening bottom trawl nets with rubber bobbin roller gear. The primary survey objectives were to define the distribution and estimate the relative abundance of the principal groundfish within the survey area and to collect data to estimate biological parameters useful to groundfish researchers and managers including age, growth, length-weight relationships, feeding habits, and size, sex, and age composition. The survey also collected ancillary data requested by other research groups. More than 150 fish and 360 invertebrate species were captured in survey tows. The species highest in total catch abundance (by weight) over the entire survey area were arrowtooth flounder (Atheresthes stomias), Pacific ocean perch (Sebastes alutus), Pacific cod (Gadus macrocephalus), and Pacific halibut (Hippoglossus stenolepis). Survey results are presented including estimates of catch per unit of effort, biomass, population size composition, and lengthweight relationships, as well as charts depicting the distribution of catch for commercially important species encountered during the survey. [doi:10.7289/V5/TM-AFSC-330 (http://dx.doi.org/10.7289/V5/TM-AFSC-330)]
Content Notes:
N. W. Raring, E. A. Laman, P.G. von Szalay, and M. H. Martin.

"September 2016."

System requirements: Adobe Acrobat Reader.

Includes bibliographical references (pages 209-210).


Keywords:
[+]
Catch Effort
Dredging (Fisheries)
Fish Surveys
Groundfishes
Groundfish Fisheries
Research

Series:
NOAA technical memorandum NMFS-AFSC ; 330
DOI:
http://doi.org/10.7289/V5/TM-AFSC-330
Document Type:
Technical Memorandum
Place as Subject:
Alaska ; Alaska, Gulf of
Alaska ; Alaska, Gulf of Less -
Rights Information:
Public Domain
Compliance:
Library
Main Document Checksum:
[+]
urn:sha256:d82653040d04f678680a40ef132953a6b14c0a20266ba1367d95287fe72b9eec
File Type:

Supporting Files

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