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

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An Erratum to this article was published on 22 December 2015

Abstract

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.

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Acknowledgments

This study forms part of the TUNU Programme, UiT The Arctic University of Norway. The analysed material was collected during the TUNU-Expeditions (Christiansen 2012). The authors would like to thank the crew of RV “Jan Mayen” for their help at sea and Tanja L. Hanebrekke for valuable assistance in the laboratory. We appreciate the constructive comments of three anonymous referees on the submitted manuscript.

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Authors and Affiliations

  1. Faculty of Biosciences, Fisheries and Economics, UiT The Arctic University of Norway, 9037, Tromsø, Norway

    Matias L. Madsen, Svein-Erik Fevolden, Jørgen S. Christiansen & Kim Præbel

  2. Department of Biology, University of Victoria, Victoria, BC, V8W 3N5, Canada

    R. John Nelson

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  1. Matias L. Madsen
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  2. R. John Nelson
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  4. Jørgen S. Christiansen
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Correspondence to Matias L. Madsen.

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This article belongs to the special issue on the “Ecology of Arctic Gadids”, coordinated by Franz Mueter, Jasmine Nahrgang, John Nelson, and Jørgen Berge.

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Madsen, M.L., Nelson, R.J., Fevolden, SE. et al. Population genetic analysis of Euro-Arctic polar cod Boreogadus saida suggests fjord and oceanic structuring. Polar Biol 39, 969–980 (2016). https://doi.org/10.1007/s00300-015-1812-y

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