AFSC/REFM: Pacific cod genetics in the Aleutian Islands 2004-2007

Metadata Updated: March 11, 2021

Landscape genetics of Pacific cod Gadus macrocephalus within the Bering Sea and Aleutian Islands (BSAI) management area of Alaska was examined in samples from nine spawning locations, including one temporal replicate sample, using 17 microsatellite DNA markers. This study examined fine-scale population structure of Pacific cod in the BSAI with the goal of identifying breaks in genetic continuity associated with physical barriers to migration and larval transport. Samples were taken from spawning fish collected from the western Aleutian Islands east to Unimak Pass and as far north as the Pribilof Islands. Overall, this work confirms previous studies, which found that genetic differentiation between samples is proportional to the distance between them, and also resolves population structure on a scale not previously possible. Results indicate that dispersal is not continuous at a fine scale and several distinct genetic groups were identified that correspond to differences in the physical environment of the BSAI. The data provide evidence for limited connectivity among spawning groups; in particular, there is evidence that a barrier exists between the Aleutian Islands and the eastern Bering Sea. In addition, analysis of molecular variance and Monmonier algorithm results suggest that, within the Bering Sea, the Unimak Pass and Pribilof Islands spawning groups may be distinct from each other, and the Wombling analysis indicates that samples west of Amchitka Pass in the western Aleutians may be distinct from those in the eastern Aleutians.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date March 11, 2021
Metadata Updated Date March 11, 2021
Data Update Frequency irregular

Additional Metadata

Resource Type Dataset
Metadata Created Date March 11, 2021
Metadata Updated Date March 11, 2021
Publisher (Point of Contact)
Unique Identifier Unknown
Identifier gov.noaa.nmfs.inport:23101
Language en-US
Data Last Modified 2013-10
Public Access Level public
Data Update Frequency irregular
Bureau Code 006:48
Metadata Context
Schema Version
Catalog Describedby
Old Spatial {"type": "Polygon", "coordinates": 170.0, 50.0, -170.0, 50.0, -170.0, 55.0, 170.0, 55.0, 170.0, 50.0}
Program Code 006:056
Source Datajson Identifier True
Source Hash 10d93e772487ab4e69557f5060a134b4f622ae64
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": 170.0, 50.0, -170.0, 50.0, -170.0, 55.0, 170.0, 55.0, 170.0, 50.0}
Temporal 2004-09-03T00:00:00/2007-09-03T00:00:00

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