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Short Citation:
Alaska Fisheries Science Center, 2022: AFSC/RACE/MACE: Results of 2014 Pollock Acoustic-Trawl Survey Bering Sea- DY1407, https://www.fisheries.noaa.gov/inport/item/28313.

Item Identification

Title: AFSC/RACE/MACE: Results of 2014 Pollock Acoustic-Trawl Survey Bering Sea- DY1407
Short Name: Results of 2014 Pollock Acoustic-Trawl Survey Bering Sea- DY1407
Status: Completed
Publication Date: 2015
Abstract:

Eastern Bering Sea shelf walleye pollock (Gadus chalcogrammus) midwater abundance and distribution were assessed from Bristol Bay in the United States, to Cape Navarin, Russia, between 12 June and 13 August 2014 using acoustic-trawl survey methods aboard the NOAA ship Oscar Dyson. Water column temperatures were warm in 2014 compared with the cold temperatures of the past several survey years (2006-2012). Most walleye pollock biomass was distributed relatively evenly across the shelf from a region north of Unimak Island to Navarin Canyon, between roughly the 50 m and 1,000 m isobaths. Estimated pollock biomass in midwater (between 16 m from the sea surface and 3 m off bottom) in the U.S. EEZ portion of the Bering Sea shelf was 3.439 million metric tons (t), nearly twice the 2012 estimate (1.843 million t) and the highest that has been observed since 2002. Pollock biomass east of 170° W was 1.425 million t (40% of the total shelf-wide), with 2-year-old pollock (26 cm modal fork length (FL)) comprising 55% of that biomass. Pollock biomass in U.S. waters west of 170° W was 2.013 million t (57% of total shelf-wide biomass), consisting primarily of pollock aged 1, 2, and 4-6 years (15, 26, and 38 cm dominant modal FL, respectively). Two-year-old pollock were more abundant east than west of 170° W and contributed to an eastward shift in distribution of U.S. pollock biomass compared with recent years. Estimated numbers of 2-year-old pollock also surpassed the numbers estimated for the strong 2008 year class in 2010, although the 2008 year class was still evident in the population. In Russia (104 thousand t, 3% of total biomass), primarily 4-year-old fish (38 cm modal FL), were observed, with proportionally fewer 1- and 2-year-olds than observed west of 170° W in the United States. The preliminary spatial distribution of euphausiid backscatter is presented, but analyses are still in progress

Other Citation Details:

Honkalehto, T., and A. McCarthy. 2015. Results of the acoustic-trawl survey of

walleye pollock (Gadus chalcogrammus) on the U.S. and Russian Bering Sea

Shelf in June - August 2014 (DY1407). AFSC Processed Rep. 2015-07, 63 p.

Alaska Fish. Sci. Cent., NOAA, Natl. Mar. Fish. Serv., 7600 Sand Point Way NE,

Seattle WA 98115.

Keywords

Theme Keywords

Thesaurus Keyword
UNCONTROLLED
None acoustic
None alaska
None fish
None pollock
None research

Physical Location

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

Data Set Information

Data Set Scope Code: Data Set
Data Set Type: Binary
Maintenance Frequency: As Needed
Data Presentation Form: Simrad RAW file format

Support Roles

Data Steward

CC ID: 269914
Date Effective From: 2015-10-29
Date Effective To:
Contact (Person): Towler, Rick
Email Address: rick.towler@noaa.gov

Distributor

CC ID: 269916
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: 269913
Date Effective From: 2015-10-29
Date Effective To:
Contact (Person): McCarthy, Abigail
Email Address: abigail.mccarthy@noaa.gov

Point of Contact

CC ID: 269915
Date Effective From: 2015-10-28
Date Effective To:
Contact (Person): Honkalehto, Taina
Email Address: taina.honkalehto@noaa.gov

Extents

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 239080
Description

Bering Sea: http://www.marineregions.org/gazetteer.php?p=details&id=4310

Extent Group 1 / Time Frame 1

CC ID: 269920
Time Frame Type: Range
Start: 2014-05
End: 2014-09

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:

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

CC ID: 736253
Download URL: http://doi.org/10.7289/V58S4MVP
Distributor:

Distribution 2

CC ID: 269919
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
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: 28313
GUID: gov.noaa.nmfs.inport:28313
Metadata Record Created By: Abigail McCarthy
Metadata Record Created: 2015-10-28 18:45+0000
Metadata Record Last Modified By: Abigail McCarthy
Metadata Record Last Modified: 2020-08-20 17:41+0000
Metadata Record Published: 2016-05-18
Owner Org: AFSC
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Review Frequency: 1 Year