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Summary

Short Citation
Alaska Fisheries Science Center, 2024: AFSC/RACE/MACE: Results of 2010 Pollock Acoustic-Trawl Survey Bering Sea- DY1006, https://www.fisheries.noaa.gov/inport/item/28341.
Full Citation Examples

Abstract

Eastern Bering Sea shelf walleye pollock (Theragra chalcogramma) abundance and distribution in midwater were assessed between 5 June and 7 August 2010 using acoustic-trawl techniques aboard the NOAA ship Oscar Dyson. The survey also assessed walleye pollock in the Cape Navarin area of Russia. Results showed that ocean surface temperatures were warmer in 2010 than in recent years (1.8° – 12.3°C in 2010 vs. 0.7° – 8.3°C in 2008 and 0.9° – 8.9°C in 2009). The majority of the pollock biomass in the U.S. Exclusive Economic Zone (EEZ) was located to the south and west of St. Matthew Island between the 100 m and 200 m isobaths. Estimated pollock abundance in midwater (between 16 m from the surface and 3 m off bottom) in the U.S.

EEZ portion of the Bering Sea shelf was high compared to recent surveys. The 2010 pollock biomass estimate in the U.S. EEZ was 2.323 million metric tons (t). The 2009 biomass was 0.924 million t and the estimated 2008 biomass was 0.997 million t. East of 170° W, the predominant length mode was 40 cm and most ages ranged between 3 and 6 years. In the U.S. west of 170° W (87.4% of total biomass), dominant modal lengths were 26, 16, and 39 cm, corresponding to pollock aged 2, 1, and 4, respectively. In Russia (5.3% of total biomass), modal lengths and ages were generally similar to those in the U.S. west of 170° W. Vertical distribution analyses indicated that 85% of adult biomass was within 40 m of the seafloor. Juveniles were found both near the seafloor and higher in the water column; 65% of juvenile biomass was within 40 m of the seafloor while 13% was within 45 m of the surface. Finally, the first field tests of a non-extractive stereo camera-trawl system (Cam-Trawl) were successfully completed during the 2010 survey, and the multifrequency euphausiid backscatter index of abundance was successfully computed, indicating a reduced abundance of euphausiids compared with that in summer 2009.

Distribution Information

Access Constraints:

None.

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.

Child Items

No Child Items for this record.

Contact Information

Point of Contact
Taina Honkalehto
taina.honkalehto@noaa.gov

Metadata Contact
Abigail McCarthy
abigail.mccarthy@noaa.gov

Extents

Geographic Area 1

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

Time Frame 1
2010-05 - 2010-09

Item Identification

Title: AFSC/RACE/MACE: Results of 2010 Pollock Acoustic-Trawl Survey Bering Sea- DY1006
Short Name: Results of 2010 Pollock Acoustic-Trawl Survey Bering Sea- DY1006
Status: Completed
Publication Date: 2011
Abstract:

Eastern Bering Sea shelf walleye pollock (Theragra chalcogramma) abundance and distribution in midwater were assessed between 5 June and 7 August 2010 using acoustic-trawl techniques aboard the NOAA ship Oscar Dyson. The survey also assessed walleye pollock in the Cape Navarin area of Russia. Results showed that ocean surface temperatures were warmer in 2010 than in recent years (1.8° – 12.3°C in 2010 vs. 0.7° – 8.3°C in 2008 and 0.9° – 8.9°C in 2009). The majority of the pollock biomass in the U.S. Exclusive Economic Zone (EEZ) was located to the south and west of St. Matthew Island between the 100 m and 200 m isobaths. Estimated pollock abundance in midwater (between 16 m from the surface and 3 m off bottom) in the U.S.

EEZ portion of the Bering Sea shelf was high compared to recent surveys. The 2010 pollock biomass estimate in the U.S. EEZ was 2.323 million metric tons (t). The 2009 biomass was 0.924 million t and the estimated 2008 biomass was 0.997 million t. East of 170° W, the predominant length mode was 40 cm and most ages ranged between 3 and 6 years. In the U.S. west of 170° W (87.4% of total biomass), dominant modal lengths were 26, 16, and 39 cm, corresponding to pollock aged 2, 1, and 4, respectively. In Russia (5.3% of total biomass), modal lengths and ages were generally similar to those in the U.S. west of 170° W. Vertical distribution analyses indicated that 85% of adult biomass was within 40 m of the seafloor. Juveniles were found both near the seafloor and higher in the water column; 65% of juvenile biomass was within 40 m of the seafloor while 13% was within 45 m of the surface. Finally, the first field tests of a non-extractive stereo camera-trawl system (Cam-Trawl) were successfully completed during the 2010 survey, and the multifrequency euphausiid backscatter index of abundance was successfully computed, indicating a reduced abundance of euphausiids compared with that in summer 2009.

Purpose:

The midwater pollock population estimates from the acoustic-trawl survey is one of three key inputs for the pollock stock assessment model, which in turn guides the North Pacific Fisheries Management Council’s annual decisions on U.S. Bering Sea pollock stock management. (Additional key inputs are demersal pollock population estimates from an annual NOAA Bering Sea bottom trawl survey, and biological data from the pollock fishing industry.)

Other Citation Details:

Honkalehto, T., A. McCarthy, P. Ressler, K. Williams, and D. Jones. 2012.

Results of the acoustic-trawl survey of walleye pollock (Theragra chalcogramma)

on the U.S. and Russian Bering Sea shelf in June - August 2010 (DY1006).

AFSC Processed Rep. 2012-01, 59 p. Alaska Fish. Sci. Cent., NOAA, Natl. Mar.

Fish. Serv., 7600 Sand Point Way NE, Seattle WA 98115.

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: 269906
Date Effective From: 2015-10-29
Date Effective To:
Contact (Person): Towler, Rick
Email Address: rick.towler@noaa.gov

Distributor

CC ID: 269908
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: 269905
Date Effective From: 2015-10-29
Date Effective To:
Contact (Person): McCarthy, Abigail
Email Address: abigail.mccarthy@noaa.gov

Point of Contact

CC ID: 269907
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: 239567
Description

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

Extent Group 1 / Time Frame 1

CC ID: 269910
Time Frame Type: Range
Start: 2010-05
End: 2010-09

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: 736267
Download URL: http://doi.org/10.7289/V5513W9X
Distributor:

Distribution 2

CC ID: 736268
Download URL: http://doi.org/10.7289/V5J1014M
Distributor:

Distribution 3

CC ID: 269909
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: 28341
GUID: gov.noaa.nmfs.inport:28341
Metadata Record Created By: Abigail McCarthy
Metadata Record Created: 2015-10-29 15:12+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