AFSC/RACE/MACE: Pollock Acoustic/Trawl Survey Spawning Annual Shumagins
Project (PRJ) | Alaska Fisheries Science Center (AFSC)GUID: gov.noaa.nmfs.inport:28143 | Updated: August 9, 2022 | Published / External
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Summary
The survey’s primary objective was to collect acoustic data and trawl information to estimate midwater abundance and distribution of walleye pollock (Gadus chalcogrammus) in the Gulf of Alaska (GOA) Shumagins Region during late winter and early spring. Acoustic data were collected using five split-beam transducers (18, 38, 70, 120, and 200 kHz) and Simrad ER60 scientific echo sounders. Midwater and near-bottom acoustic backscatter was sampled using an Aleutian Wing 30/26 Trawl (AWT) and a poly Nor’eastern bottom trawl (PNE) with roller gear. This long-running survey has consistently provided data on the pollock population in the western GOA during winter and spring months.
Child Items
Contact Information
Point of Contact
Abigail McCarthy
abigail.mccarthy@noaa.gov
Metadata Contact
Abigail McCarthy
abigail.mccarthy@noaa.gov
Extents
Gulf of Alaska: http://www.marineregions.org/gazetteer.php?p=details&id=4312
Item Identification
Title: | AFSC/RACE/MACE: Pollock Acoustic/Trawl Survey Spawning Annual Shumagins |
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Short Name: | Pollock Acoustic/Trawl Annual Survey Shumagins |
Status: | In Work |
Abstract: |
The survey’s primary objective was to collect acoustic data and trawl information to estimate midwater abundance and distribution of walleye pollock (Gadus chalcogrammus) in the Gulf of Alaska (GOA) Shumagins Region during late winter and early spring. Acoustic data were collected using five split-beam transducers (18, 38, 70, 120, and 200 kHz) and Simrad ER60 scientific echo sounders. Midwater and near-bottom acoustic backscatter was sampled using an Aleutian Wing 30/26 Trawl (AWT) and a poly Nor’eastern bottom trawl (PNE) with roller gear. This long-running survey has consistently provided data on the pollock population in the western GOA during winter and spring months. |
Purpose: |
The Shumagins region is a critical spawning ground for walleye pollock and annual surveys of pollock age structure and biomass are used to inform GOA pollock stock assesment models. In particular, there is a strong correlation between the abundance of age-1 pollock in the Shumagin Islands survey and year-class strength for the GOA region. |
Physical Location
Organization: | Alaska Fisheries Science Center |
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City: | Seattle |
State/Province: | WA |
Country: | USA |
Support Roles
Data Steward
Date Effective From: | 2015-10-29 |
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Date Effective To: | |
Contact (Person): | Towler, Rick |
Email Address: | rick.towler@noaa.gov |
Distributor
Date Effective From: | 2015-10-29 |
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Date Effective To: | |
Contact (Person): | Anderson, Charles |
Address: |
325 Broadway, E/GC3 Boulder, CO 33149 |
Email Address: | charles.anderson@noaa.gov |
Phone: | 303-497-4742 |
Metadata Contact
Date Effective From: | 2015-10-29 |
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Date Effective To: | |
Contact (Person): | McCarthy, Abigail |
Email Address: | abigail.mccarthy@noaa.gov |
Point of Contact
Date Effective From: | 2015-10-29 |
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Date Effective To: | |
Contact (Person): | McCarthy, Abigail |
Email Address: | abigail.mccarthy@noaa.gov |
Extents
Extent Group 1
Extent Group 1 / Geographic Area 1
Description |
Gulf of Alaska: http://www.marineregions.org/gazetteer.php?p=details&id=4312 |
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Access Information
Security Class: | Unclassified |
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Data Access Procedure: |
Go to https://www.ngdc.noaa.gov/mgg/wcd/ or email Anderson, Charles (charles.anderson@noaa.gov) |
Data Access Constraints: |
None. |
Data 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 Information
Distribution 1
Download URL: | https://www.ngdc.noaa.gov/mgg/wcd/ |
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Distributor: |
Data Quality
Quality Control Procedures Employed: |
These data were collected in accordance 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 |
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Child Items
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Catalog Details
Catalog Item ID: | 28143 |
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GUID: | gov.noaa.nmfs.inport:28143 |
Metadata Record Created By: | Abigail McCarthy |
Metadata Record Created: | 2015-10-23 12:42+0000 |
Metadata Record Last Modified By: | SysAdmin InPortAdmin |
Metadata Record Last Modified: | 2022-08-09 17:11+0000 |
Metadata Record Published: | 2016-05-18 |
Owner Org: | AFSC |
Metadata Publication Status: | Published Externally |
Do Not Publish?: | N |
Metadata Last Review Date: | 2016-05-18 |
Metadata Review Frequency: | 1 Year |
Metadata Next Review Date: | 2017-05-18 |