Population genetic analysis of Euro-Arctic polar cod Boreogadus saida suggests fjord and oceanic structuring

Polar cod, Boreogadus saida , is a key species in Arctic marine ecosystems; however, its genetic population structure is largely undescribed. The population genetic structure of 472 B. saida specimens among nine locations in the north-east Atlantic was revealed using 12 microsatellite loci. Pairwise...

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Bibliographic Details
Published in:Polar biology 2016-06, Vol.39 (6), p.969-980
Main Authors: Madsen, Matias L., Nelson, R. John, Fevolden, Svein-Erik, Christiansen, Jørgen S., Præbel, Kim
Format: Article
Language:English
Subjects:
Analysis
Biomedical and Life Sciences
Boreogadus saida
Cod
Ecology
Fishes
Fjords
Gadus morhua
Genetic aspects
Genetic diversity
Genetic structure
Habitats
Life Sciences
Marine ecosystems
Microbiology
Oceanography
Original Paper
Plant Sciences
Population differentiation
Population genetics
Population structure
Recolonization
Zoology
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Summary:Polar cod, Boreogadus saida , is a key species in Arctic marine ecosystems; however, its genetic population structure is largely undescribed. The population genetic structure of 472 B. saida specimens among nine locations in the north-east Atlantic was revealed using 12 microsatellite loci. Pairwise F ST comparisons showed significant population differentiation between B. saida sampled inside fjords in Svalbard and north-east Greenland, as compared to B. saida from the shelf. The observed genetic variation was not a function of isolation by distance, and it is speculated that B. saida populations inhabiting fjords may have become reproductively isolated from shelf-dwelling B. saida during the last post-glacial recolonization.
ISSN:0722-4060
1432-2056
DOI:10.1007/s00300-015-1812-y