Gulf of Alaska Acoustic-Trawl Surveys of Walleye Pollock (DY0901, ME70)

Metadata Updated: February 7, 2018

The Midwater Assessment and Conservation Engineering (MACE) program of NOAA National Marine Fisheries Service (NMFS), Alaska Fisheries Science Center (AFSC) conducted acoustic-trawl (AT) stock assessment surveys in the western Gulf of Alaska (GOA) during the winter of 2009 to estimate the distribution and abundance of walleye pollock (Theragra chalcogramma). The vessel departed Kodiak, Alaska on 12 February and conducted echosounder system calibrations in Three Saints Bay, Kodiak Island, Alaska. The vessel conducted the Shumagin Islands survey (including Shumagin Trough, Stepovak Bay, Renshaw Point, Unga Strait, and West Nagai Strait) 15-18 February. The vessel then surveyed Sanak Trough on 18-19 February, followed by a survey of the continental shelf break from Sanak Island to Unalaska Island 19-20 February. The vessel conducted equipment research operations utilizing a lowered target strength transducer system 21-22 February and arrived in Dutch Harbor, Alaska on 22 February. The primary acoustic echosounder system for this survey was a Simrad EK60; a Simrad ME70 multibeam echosounder system was also operated for the duration of the cruise. The survey was conducted aboard NOAA Ship Oscar Dyson, a 64 meter fisheries research stern trawler equipped with acoustic and oceanographic instrumentation.

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Downloads & Resources

Dates

Metadata Date May 31, 2017
Metadata Created Date February 7, 2018
Metadata Updated Date February 7, 2018
Reference Date(s) February 11, 2009 (creation)
Frequency Of Update notPlanned

Metadata Source

Harvested from NOAA CSW Harvest Source

Additional Metadata

Resource Type Series
Metadata Date May 31, 2017
Metadata Created Date February 7, 2018
Metadata Updated Date February 7, 2018
Reference Date(s) February 11, 2009 (creation)
Responsible Party DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce (Point of Contact); AFSC (Point of Contact)
Contact Email
Access Constraints Cite as: Alaska Fisheries Science Center (2009): Water Column Sonar Data Collection (DY0901, ME70). National Centers for Environmental Information, NOAA. doi:10.7289/V5610XDV [access date], Resource may not be available for up to one year after initial collection.
Bbox East Long -152.04559
Bbox North Lat 57.78371
Bbox South Lat 56.90566
Bbox West Long -153.51766
Coupled Resource
Frequency Of Update notPlanned
Guid gov.noaa.ngdc.mgg.wcd:DY0901_ME70
Harvest Object Id e6bdfc35-58c4-46ec-948a-a7be1e0308a7
Harvest Source Id 2aed8e29-fc5b-4cde-aa66-fb1118fd705e
Harvest Source Title NOAA CSW Harvest Source
Licence 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.
Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System urn:ogc:def:crs:EPSG:4326
Spatial Harvester True
Temporal Extent Begin 2009-02-11T22:52:52
Temporal Extent End 2009-02-22T11:24:46

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