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AFSC/RACE/MACE: Results of 2018 acoustic trawl survey Gulf of Alaska DY1801

Metadata Updated: April 1, 2024

Scientists from the Midwater Assessment and Conservation Engineering ( MACE) Program of the Alaska Fisheries Science Center's (AFSC) Resource Assessment and Conservation Engineering (RACE) Division conducted acoustic-trawl (AT) stock assessment surveys in the Gulf of Alaska (GOA) during late winter and early spring 2018 to estimate the distribution and abundance of walleye pollock (Gadus chalcogrammus) at several of their main spawning grounds. These pre-spawning pollock surveys included the Shumagin Islands, Sanak Trough, Morzhovoi and Pavlof bays (DY2018-01; 5-15 February)

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 February 29, 2024
Metadata Created Date March 10, 2023
Metadata Updated Date April 1, 2024
Reference Date(s) February 16, 2018 (creation), February 16, 2018 (revision), (publication)
Frequency Of Update notPlanned

Metadata Source

Harvested from NMFS AFSC

Additional Metadata

Resource Type Dataset
Metadata Date February 29, 2024
Metadata Created Date March 10, 2023
Metadata Updated Date April 1, 2024
Reference Date(s) February 16, 2018 (creation), February 16, 2018 (revision), (publication)
Responsible Party (Point of Contact, Custodian)
Contact Email
Guid gov.noaa.nmfs.inport:63220
Access Constraints Cite As: Alaska Fisheries Science Center, [Date of Access]: AFSC/RACE/MACE: Results of 2018 acoustic trawl survey Gulf of Alaska DY1801 [Data Date Range], https://www.fisheries.noaa.gov/inport/item/63220., 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 -158.4629
Bbox North Lat 55.5868
Bbox South Lat 54.5585
Bbox West Long -162.9961
Coupled Resource
Frequency Of Update notPlanned
Harvest Object Id b26032a2-2e27-4718-9d00-b0b9e455c3ff
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": [[[-162.9961, 54.5585], [-158.4629, 54.5585], [-158.4629, 55.5868], [-162.9961, 55.5868], [-162.9961, 54.5585]]]}
Progress
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 2018-02-05
Temporal Extent End 2018-02-16

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