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Polar Biology

, Volume 32, Issue 3, pp 471–479 | Cite as

An assessment of mitochondrial variation in Arctic gadoids

  • Snæbjörn PálssonEmail author
  • Thomas Källman
  • Jonas Paulsen
  • Einar Árnason
Original Paper

Abstract

Climatic changes during the quaternary history in Arctic regions have shaped the genetic variation and genealogies of Arctic species. Several studies have been conducted in recent years on genetic diversity of Arctic organisms, but marine fishes are largely underrepresented in these studies. Here, we present a study on mitochondrial variation in three Arctic gadoids: Arctic cod (Arctogadus glacialis), Greenland cod (Gadus ogac), and Polar cod (Boreogadus saida). In addition, geographic variation in Polar cod is presented. The sequence variation at the mtDNA presents similar patterns as observed for other related marine fishes. Variation in these three species reflects rather different historic processes, due to colonization and climatic changes than differences in life histories. In Polar cod, a deeper genealogy is observed and variation is dependent on both latitude and longitude. The deep genealogy indicates either admixture of separate lineages or a population, which has been stable in size during alternating cold and warm periods of the pleistocene.

Keywords

Arctic Gadoids mtDNA Genealogy Variation Phylogeography Climate Geographic barriers 

Notes

Acknowledgments

We want to thank several people who kindly provided samples: Jónbjörn Pálsson, Marine Research Institute, Iceland; Mike Canino, RACE Division, Seattle; Per Kannerworff, Greenland Institute of Natural Resources; Svein-Erik Fevolden and Jörgen Schau Christiansen, University of Tromsö; TUNU-I expedition; and Takashi Yanagimoto, Hokkaido National Fisheries Research Institute. The work was supported by a grant from the Icelandic Research Fund.

Supplementary material

300_2008_542_MOESM1_ESM.doc (184 kb)
Supplement (DOC 183 kb)

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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • Snæbjörn Pálsson
    • 1
    Email author
  • Thomas Källman
    • 1
  • Jonas Paulsen
    • 1
  • Einar Árnason
    • 1
  1. 1.Institute of BiologyUniversity of IcelandReykjavikIceland

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