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An assessment of mitochondrial variation in Arctic gadoids
Institute of Biology, University of Iceland.
2009 (English)In: Polar Biology, ISSN 0722-4060, E-ISSN 1432-2056, Vol. 32, no 3, 471-479 p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2009. Vol. 32, no 3, 471-479 p.
Keyword [en]
Arctic, Gadoids, mtDNA, Genealogy, Variation, Phylogeography, Climate, Geographic barriers
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:uu:diva-121393DOI: 10.1007/s00300-008-0542-9OAI: oai:DiVA.org:uu-121393DiVA: diva2:305222
Available from: 2010-03-23 Created: 2010-03-23 Last updated: 2017-12-12Bibliographically approved

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