AFSC/RACE/MACE: Results of 2010 Pollock Acoustic-Trawl Survey Bering Sea- DY1006

Metadata Updated: December 7, 2020

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.

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Dates

Metadata Date November 24, 2020
Metadata Created Date October 13, 2020
Metadata Updated Date December 7, 2020
Reference Date(s) 2011 (publication)
Frequency Of Update asNeeded

Metadata Source

Harvested from NMFS AFSC

Additional Metadata

Resource Type Dataset
Metadata Date November 24, 2020
Metadata Created Date October 13, 2020
Metadata Updated Date December 7, 2020
Reference Date(s) 2011 (publication)
Responsible Party (Point of Contact, Custodian)
Contact Email
Access Constraints Cite As: Alaska Fisheries Science Center, [Date of Access]: AFSC/RACE/MACE: Results of 2010 Pollock Acoustic-Trawl Survey Bering Sea- DY1006 [Data Date Range], https://www.fisheries.noaa.gov/inport/item/28341., 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.
Coupled Resource
Frequency Of Update asNeeded
Guid gov.noaa.nmfs.inport:28341
Harvest Object Id 29e75a8a-959f-4740-b510-f868fec81e59
Harvest Source Id 4ec9cdf0-d791-4933-8ba3-703563ff892e
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.
Metadata Language eng
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 2010-05-01
Temporal Extent End 2010-09-01

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