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    • AFSC/RACE/MACE: Results of 2019 acoustic trawl survey Gulf of Alaska SH1904

    Metadata Updated: June 1, 2025

    Scientists from the Alaska Fisheries Science Center conducted acoustic-trawl stock assessment surveys in the Gulf of Alaska during late winter and early spring 2019 to estimate the distribution and abundance of walleye pollock (Gadus chalcogrammus) at several of their main spawning grounds.

    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.

    Downloads & Resources

    Dates

    Metadata Date May 15, 2025
    Metadata Created Date October 28, 2022
    Metadata Updated Date June 1, 2025
    Reference Date(s) March 22, 2019 (creation), March 22, 2019 (revision), (publication)
    Frequency Of Update notPlanned

    Metadata Source

    Harvested from NMFS AFSC

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Date May 15, 2025
    Metadata Created Date October 28, 2022
    Metadata Updated Date June 1, 2025
    Reference Date(s) March 22, 2019 (creation), March 22, 2019 (revision), (publication)
    Responsible Party (Point of Contact, Custodian)
    Contact Email
    Guid gov.noaa.nmfs.inport:58284
    Access Constraints Cite As: Alaska Fisheries Science Center, [Date of Access]: AFSC/RACE/MACE: Results of 2019 acoustic trawl survey Gulf of Alaska SH1904 [Data Date Range], https://www.fisheries.noaa.gov/inport/item/58284., Access Constraints: The data set is still being analyzed and will not be available for distribution until it has been finalized and all QA/QC practices have been performed. Contact the Data Point Of Contact for estimated time of release., Use Constraints: User must read and fully comprehend the metadata prior to use. User must acknowledge the Originator when using the data set as a source. User must share data products developed using the source data set with the Originator. Data should not be used beyond the limits of the source scale., Distribution Liability: Enter the distribution liability statement.
    Bbox East Long -151.8448
    Bbox North Lat 58.5467
    Bbox South Lat 55.941
    Bbox West Long -156.2557
    Coupled Resource
    Frequency Of Update notPlanned
    Harvest Object Id 9c6b2485-8910-4645-8b55-dd5a755522b2
    Harvest Source Id 26a29bb9-50b0-47fd-920b-edc74aa6ec76
    Harvest Source Title NMFS AFSC
    Licence NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose.
    Lineage Acoustic data were recorded at the five split-beam frequencies using ER60 software and, as a backup, acoustic telegram data were logged with Myriax EchoLog 500 software. Acoustic measurements were collected from 16 m below the sea surface to within 0.5 m of the sounder-detected bottom or a maximum of 1,000 m in deep water. Data were analyzed using Myriax Echoview post-processing software. See National Marine Fisheries Service (NMFS) 2013. NOAA protocols for fisheries acoustics surveys and related sampling (Alaska Fisheries Science Center), 23 p. Prepared by Midwater Assessment and Conservation Engineering Program, Alaska Fish. Sci. Center, Natl. Mar. Fish. Serv., NOAA. Available online: http://www.afsc.noaa.gov/RACE/midwater/AFSC%20AT%20Survey%20Protocols_Feb%202013.pdf
    Metadata Language eng
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-156.2557, 55.941], [-151.8448, 55.941], [-151.8448, 58.5467], [-156.2557, 58.5467], [-156.2557, 55.941]]]}
    Progress
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 2019-03-06
    Temporal Extent End 2019-03-22

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