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ICES Journal of Marine Science: Journal du Conseil Advance Access originally published online on March 24, 2009
ICES Journal of Marine Science: Journal du Conseil 2009 66(4):680-690; doi:10.1093/icesjms/fsp059
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© 2009 International Council for the Exploration of the Sea. Published by Oxford Journals. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Depth as a potential driver of genetic structure of Sebastes mentella across the North Atlantic Ocean

Magnús Örn Stefánsson1, Jákup Reinert2, Þorsteinn Sigurðsson1, Kristján Kristinsson1, Kjell Nedreaas3 and Christophe Pampoulie1

1 Marine Research Institute, Skúlagata 4, 101 Reykjavík, Iceland
2 Faroese Fisheries Laboratory, Nóatún 1, PO Box 3051, FO-110 Tórshavn, Faroe Islands
3 Institute of Marine Research, PO Box 1870, Nordnes, 5817 Bergen, Norway

Correspondence to C. Pampoulie: tel: +354 575 2038; fax: +354 575 2001; e-mail: chrisp{at}hafro.is.

Stefánsson, M. Ö., Reinert, J., Sigurðsson, Þ., Kristinsson, K., Nedreaas, K., and Pampoulie, C. 2009. Depth as a potential driver of genetic structure of Sebastes mentella across the North Atlantic Ocean. – ICES Journal of Marine Science, 66: 680–690.

A primary question that remains to be answered about the fishery for Sebastes mentella is whether it exploits several stocks within the North Atlantic Ocean. To address this issue, 1240 redfish were collected from several fishing grounds in late 2006 and early 2007 and genotyped at 12 microsatellite loci. Contemporary allele frequencies were compared with archived data to examine the temporal stability of the genetic structure. The analyses all revealed the presence of three genetically distinguishable clusters, which persisted throughout the study period, suggesting that the genetic structure detected is genuine. Cluster D included fish from the deep Irminger Sea and west Faroe Islands, and Cluster I included fish only from the Icelandic shelf. All other fish grouped in a third cluster (S). Further analyses revealed that the genetic pattern observed was not primarily attributable to isolation by distance, but rather to depth distribution.

Keywords: microsatellite loci, migration, North Atlantic Ocean, redfish, Sebastes mentella

Received 6 October 2008; accepted 19 February 2009; advance access publication 24 March 2009.


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