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Short Citation:
Alaska Fisheries Science Center, 2022: AFSC/RACE/MACE: Results of 2011 acoustic trawl survey Gulf of Alaska DY1103, https://www.fisheries.noaa.gov/inport/item/31668.

Item Identification

Title: AFSC/RACE/MACE: Results of 2011 acoustic trawl survey Gulf of Alaska DY1103
Short Name: 2011 Summer Gulf of Alaska EIT Survey
Abstract:

Scientists from the Midwater Assessment and Conservation Engineering (MACE) Program of the Alaska Fisheries Science Center (AFSC) Resource Assessment and Conservation Engineering (RACE) Division routinely conduct acoustic-trawl (AT) stock assessment surveys to estimate the distribution and abundance of walleye pollock (Gadus chalcogrammus).The survey (cruise DY2011-03) was conducted between 14 June and 12 August on the Gulf of Alaska shelf from 50-500 m depth extending from the Islands of Four Mountains to the Chiniak Trough east of Kodiak Island. The area referred to as the shelf includes transects that are roughly perpendicular to the continental shelf depth contours and extend in a general north-south direction from inshore bottom depths of <=50 m to upper continental slope bottom depths of >500 m. Smaller surveys were conducted in several bays and around islands including: Morzhovoi Bay, Sanak Trough, Pavlof Bay, the Shumagin Islands areas of Renshaw Point, Unga Strait, and West Nagai Strait, Mitrofania Island, Nakchamik Island, Shelikof Strait, Chiniak Trough, Barnabas Trough, and Alitak Bay. All activities were conducted aboard the NOAA ship Oscar Dyson, a 64-m stern trawler equipped for fisheries and oceanographic research. The survey followed established AT methods as specified in NOAA protocols for fisheries acoustics surveys and related sampling.

Purpose:

Pollock Stock assessment

Notes:

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Other Citation Details:

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Supplemental Information:

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Physical Location

Organization: Alaska Fisheries Science Center
City: Seattle
State/Province: WA
Country: USA

Data Set Information

Data Set Scope Code: Data Set
Data Presentation Form: Digital

Support Roles

Data Steward

CC ID: 309393
Date Effective From: 2015
Date Effective To:
Contact (Person): Towler, Rick
Email Address: rick.towler@noaa.gov

Distributor

CC ID: 309394
Date Effective From: 2015
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

CC ID: 309395
Date Effective From: 2014-07-31
Date Effective To:
Contact (Person): MC, Metadata Coordinators
Email Address: AFSC.metadata@noaa.gov

Originator

CC ID: 309396
Date Effective From: 2014-07-31
Date Effective To:
Contact (Person): McCarthy, Abigail
Email Address: abigail.mccarthy@noaa.gov

Point of Contact

CC ID: 309397
Date Effective From: 2015
Date Effective To:
Contact (Person): Jones, Darin
Email Address: darin.jones@noaa.gov

Extents

Extent Group 1

Extent Description:

Enter a general description of the extent, if any.

Extent Group 1 / Geographic Area 1

CC ID: 309400
W° Bound: -169.5032
E° Bound: -151.3241
N° Bound: 59.151
S° Bound: 52.7463
Description

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Extent Group 1 / Time Frame 1

CC ID: 309399
Time Frame Type: Range
Start: 2011-06-14
End: 2011-08-12
Description:

Enter a description of the time frame.

Access Information

Security Class: Unclassified
Data Access Procedure:

Go to https://www.ngdc.noaa.gov/mgg/wcd/ or email Anderson, Charles (charles.anderson@noaa.gov)

Data 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.

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

CC ID: 736276
Download URL: http://doi.org/10.7289/V5QC01D6
Distributor:

Distribution 2

CC ID: 736277
Download URL: http://doi.org/10.7289/V5WH2N2V
Distributor:

Distribution 3

CC ID: 309401
Download URL: https://www.ngdc.noaa.gov/mgg/wcd/
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

Data Management

Have Resources for Management of these Data Been Identified?: No
Approximate Percentage of Budget for these Data Devoted to Data Management: Unknown.
Do these Data Comply with the Data Access Directive?: Yes
Is Access to the Data Limited Based on an Approved Waiver?: Yes
Approximate Delay Between Data Collection and Dissemination: 180
If Delay is Longer than Latency of Automated Processing, Indicate Under What Authority Data Access is Delayed:

If the delay between data collection and dissemination is longer than the latency of automated processing, explain under what authority data access is delayed. This field should only be included if the delay is longer than the latency of automated processing.

Actual or Planned Long-Term Data Archive Location: NCEI-CO
Approximate Delay Between Data Collection and Archiving: 180
How Will the Data Be Protected from Accidental or Malicious Modification or Deletion Prior to Receipt by the Archive?:

IT Security and Contingency Plan for the system establishes procedures and applies to the functions, operations, and resources necessary to recover and restore data as hosted in the Western Regional Support Center in Seattle, Washington, following a disruption.

Lineage

Lineage Statement:

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

Catalog Details

Catalog Item ID: 31668
GUID: gov.noaa.nmfs.inport:31668
Metadata Record Created By: Abigail McCarthy
Metadata Record Created: 2016-03-23 20:18+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2019-06-04 13:14+0000
Metadata Record Published: 2016-05-18
Owner Org: AFSC
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Review Frequency: 1 Year