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

Metadata Updated: February 27, 2019

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.

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Metadata Date November 15, 2018
Metadata Created Date September 26, 2015
Metadata Updated Date February 27, 2019
Reference Date(s) 2013-10 (publication)
Frequency Of Update notPlanned

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Harvested from NOAA CSW Harvest Source

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Specimen collection locations.

Additional Metadata

Resource Type Dataset
Metadata Date November 15, 2018
Metadata Created Date September 26, 2015
Metadata Updated Date February 27, 2019
Reference Date(s) 2013-10 (publication)
Responsible Party (Point of Contact, Custodian)
Contact Email
Access Constraints Access Constraints: There are no legal restrictions on access to the data. They reside in public domain and can be freely distributed. | Use Constraints: User must read and fully comprehend the metadata prior to use. Applications or inferences derived from the data should be carefully considered for accuracy. Acknowledgement of NOAA/NMFS/AFSC, as the source from which these data were obtained in any publications and/or other representations of these, data is suggested.
Bbox East Long -170
Bbox North Lat 55
Bbox South Lat 50
Bbox West Long 170
Coupled Resource
Frequency Of Update notPlanned
Graphic Preview Description Specimen collection locations.
Graphic Preview File
Graphic Preview Type URL
Guid gov.noaa.nmfs.inport:23101
Harvest Object Id 14b82586-faba-40a4-837e-8d648461932d
Harvest Source Id 2aed8e29-fc5b-4cde-aa66-fb1118fd705e
Harvest Source Title NOAA CSW Harvest Source
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 2004
Temporal Extent End 2007

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