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Shumagin Islands Acoustic-Trawl Survey of Walleye Pollock (DY1201)

The Midwater Assessment and Conservation Engineering (MACE) program of the Alaska Fisheries Science Center (AFSC) conducted an acoustic-trawl (AT) stock assessment survey in the Gulf of Alaska (GOA) during the late winter of 2012 to estimate the distribution and abundance of walleye pollock (Gadus chalcogrammus). The survey areas included the Shumagin Islands (February 15-16, 2012) and Sanak Trough (February 17-20, 2012). The survey was conducted onboard NOAA Ship Oscar Dyson, a 64 meter stern trawler equipped with acoustic and oceanographic instrumentation in addition to trawling and biological sampling capabilities. The primary instrumentation for the survey was a Simrad EK60 split-beam echosounder system utilizing five frequencies (18, 38, 70, 120, and 200 kHz) and a Simrad ME70 multibeam echosounder, with the ME70 trigger slaved to the EK60 system.

Cite as: Alaska Fisheries Science Center (2012): Water Column Sonar Data Collection (DY1201, ME70). National Geophysical Data Center, NOAA. doi:10.7289/V5FJ2DQS [access date]

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Distribution Formats
  • Simrad ME70 raw files (Version: 1)
Distributor DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Principal Investigator Chris Wilson
DOC/NOAA/NMFS/AFSC > Alaska Fisheries Science Center
(206) 526-6435
chris.wilson@noaa.gov
Documentation links not available.
Resource Provider
  • DOC/NOAA/NMFS/AFSC > Alaska Fisheries Science Center
Publisher
  • DOC/NOAA/NESDIS/NGDC - National Geophysical Data Center
Date(s)
  • creation: 2012-02-12
Dataset Progress Status Complete
Data Update Frequency: Not planned
Purpose: Acoustic-trawl survey of walleye pollock in Shumagins and Sanak Trough areas of the Gulf of Alaska
Use Limitations
  • While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
  • These data are considered raw and have not been subjected to the NOAA's quality control or quality assurance procedures. They are released for limited public use as preliminary data to be used only with appropriate caution. NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
  • Not subject to copyright protection within the United States.
Time Period: 2012-02-12T23:59:15  to  2012-02-22T19:19:02
Spatial Reference System: urn:ogc:def:crs:EPSG:4326
Spatial Bounding Box Coordinates:
N: 58.0173372
S: 54.331708575
E: -151.8867995
W: -163.234061537
Spatial Coverage Map:
Themes
  • EARTH SCIENCE > Oceans > Ocean Acoustics > Acoustic Scattering
  • EARTH SCIENCE > Oceans > Aquatic Sciences > Fisheries
  • EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetry
  • EARTH SCIENCE > Biosphere > Aquatic Ecosystems
  • EARTH SCIENCE > Biosphere > Aquatic Ecosystems > Marine Habitat
  • EARTH SCIENCE > Biosphere > Aquatic Ecosystems > Benthic Habitat
  • EARTH SCIENCE > Biosphere > Aquatic Ecosystems > Pelagic Habitat
  • EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Seafloor Topography
Data Centers
  • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • DOC/NOAA/NMFS > National Marine Fisheries Service, NOAA, U.S. Department of Commerce
Instruments
  • In Situ/Laboratory Instruments > Profilers/Sounders > Acoustic Sounders > WCMS > Water Column Mapping System
Places
  • Gulf of Alaska
  • Global
  • Sea Floor
Use Constraints
  • Cite as: Alaska Fisheries Science Center (2012): Water Column Sonar Data Collection (DY1201, ME70). National Geophysical Data Center, NOAA. doi:10.7289/V5FJ2DQS [access date]
Access Constraints
  • Resource will be available one year after initial collection.
Fees
  • Free
Lineage Statement Calibrated w/ calibration data

Metadata Last Modified: 2014-10-02

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