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DY1207 Bering Sea ME70

Scientists from the Midwater Assessment and Conservation Engineering (MACE) Program of the Alaska Fisheries Science Center (AFSC) have conducted summer surveys to estimate the abundance and distribution of walleye pollock (Theragra chalcogramma) on the eastern Bering Sea (EBS) shelf since 1979. Surveys have been conducted either annually or biennially since 1994. The 2012 acoustic-trawl (AT) survey was carried out between 7 June and 10 August aboard the NOAA ship Oscar Dyson. Its primary objective was to collect acoustic and trawl information to estimate walleye pollock midwater abundance and distribution on the U.S. and Russian Bering Sea shelf. Additional survey sampling included conductivity-temperature-depth (CTD) and expendable bathythermograph (XBT) casts to characterize the Bering Sea shelf physical environment, and supplemental trawls to improve acoustic species classification and to obtain an index of euphausiid abundance using multiple frequency techniques. A number of specialized sampling devices were used during the survey, including light level sensors; a Simrad ME70 multibeam sonar to image fish schools; an 83-112 bottom trawl modified to sample fish in midwater; a trawl-mounted stereo camera ("Cam-Trawl") designed to identify species and determine size and density of animals as they pass by the camera during a haul, and a small, bottom-moored, trigger camera system to autonomously collect images of fish on the seafloor.
Cite as: Alaska Fisheries Science Center (2012): Water Column Sonar Data Collection (DY1207, ME70). National Geophysical Data Center, NOAA. doi:10.7289/V5KK98PX [access date]
Online Access
Distribution Formats
  • Simrad ME70 raw files (Version: 1)
    • File Specification: Simrad ME70 raw files. See the Simrad ME70 interface specification manual for further information.
Distributor DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Dataset Principal Investigator Chris Wilson
Supervisory Research Fish Biologist
DOC/NOAA/NMFS/AFSC > Alaska Fisheries Science Center
(206) 526-6435
chris.wilson@noaa.gov
Documentation links not available.
Date(s)
  • creation: 2012-06-08
Dataset Progress Status Complete
Data Update Frequency: Not planned
Purpose: Acoustic-Trawl Survey of Walleye Pollock (Theragra chalcogramma) on the Bering Sea shelf. Data were collected on fish distributions and school characteristics using the EK60 scientific echosounder and the ME70 multi-beam echosounder.
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.
Resource Provider(s)
  • DOC/NOAA/NMFS/AFSC > Alaska Fisheries Science Center
Point(s) of Contact
  • DOC/NOAA/NMFS/AFSC > Alaska Fisheries Science Center
  • DOC/NOAA/NMFS/AFSC > Alaska Fisheries Science Center
Publisher(s)
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
  • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Time Period: 2012-06-08T00:47:44 to 2012-08-09T15:26:50
Spatial Reference System: urn:ogc:def:crs:EPSG:4326
Spatial Bounding Box Coordinates:
N: 63.2933313333
S: 53.8521558333
E: -162.007
W: 178.324
Spatial Coverage Map:
Theme keywords
  • 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 Center keywords
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
  • 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
Instrument keywords
  • In Situ/Laboratory Instruments > Profilers/Sounders > Acoustic Sounders > WCMS > Water Column Mapping System
Place keywords
  • Bering Sea
  • Global
  • Vertical Location > Sea Floor
Use Constraints
  • Cite as: Alaska Fisheries Science Center (2012): Water Column Sonar Data Collection (DY1207, ME70). National Geophysical Data Center, NOAA. doi:10.7289/V5KK98PX [access date]
Access Constraints
  • Resource will be available one year after initial collection.
Fees
  • Free
Lineage information for: repository
Processing Steps
  • 2015-04-22T00:00:00 - NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
Lineage information for: series
Acquisition Information (collection)
Instrument
  • Simrad ME70
  • Simrad ME70
  • Simrad EK60
  • Simrad ES60
  • Knudsen CHIRP 3260
  • Sippican XBT/XSV
  • SBE 49 FastCAT
  • SBE 911plus CTD
  • SBE 32
  • POS/MV 320
Platform
  • Oscar Dyson (DY)
Operation
  • DY1207
Last Modified: 2015-09-02
For questions about the information on this page, please email: wcd.info@noaa.gov