Gulf of Alaska Acoustic-Trawl Survey of Walleye Pollock (DY1302, EK60)

Metadata Updated: October 13, 2020

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 Gulf of Alaska (GOA) during the winter of 2013 to estimate the distribution and abundance of walleye pollock (Gadus chalcogrammus). The vessel departed Kodiak, Alaska on 7 February, conducted EK60 echosounder system calibration on 9 February, then returned to Kodiak due to vessel mechanical issues on 12 February. The vessel departed Kodiak on 24 February following repairs, arriving at the start of the first survey on 26 February. The Shumagin Islands survey was conducted 26 February to 1 March and included Shumagin Trough, Stepovak Bay, Renshaw Point, Unga Strait, and West Nagai Strait. The Sanak Trough survey was conducted on 2 March, followed by the Morzhovoi Bay survey on 3 March; the vessel arrived in Kodiak on 4 March. The survey was conducted aboard NOAA Ship Oscar Dyson, a 64 meter stern trawler equipped with acoustic and oceanographic instrumentation.

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Dates

Metadata Date May 30, 2017
Metadata Created Date October 13, 2020
Metadata Updated Date October 13, 2020
Reference Date(s) February 7, 2013 (creation)
Frequency Of Update notPlanned

Metadata Source

Harvested from NGDC MGG Sonar Water Column

Additional Metadata

Resource Type Series
Metadata Date May 30, 2017
Metadata Created Date October 13, 2020
Metadata Updated Date October 13, 2020
Reference Date(s) February 7, 2013 (creation)
Responsible Party DOC/NOAA/NMFS/AFSC > Alaska Fisheries Science Center (Principal Investigator)
Contact Email
Access Constraints Cite as: Alaska Fisheries Science Center (2013): Water Column Sonar Data Collection (DY1302, EK60). National Centers for Environmental Information, NOAA. doi:10.7289/V59Z92WF [access date], Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives., Resource may not be available for up to one year after initial collection.
Bbox East Long -152.02608
Bbox North Lat 58.01631
Bbox South Lat 54.44067
Bbox West Long -163.30879
Coupled Resource
Frequency Of Update notPlanned
Guid gov.noaa.ngdc.mgg.wcd:DY1302_EK60
Harvest Object Id 8dfcb77f-ac9a-4945-8499-113e779051bd
Harvest Source Id 05749f71-eeac-4431-872a-137d664b78cc
Harvest Source Title NGDC MGG Sonar Water Column
Licence 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 2013-02-07T19:05:03
Temporal Extent End 2013-03-05T03:47:48

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