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ICES Journal of Marine Science: Journal du Conseil 2001 58(1):114-122; doi:10.1006/jmsc.2000.0995
© 2001 by ICES/CIEM International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer
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Genetic differentiation among Atlantic cod (Gadus morhua L.) in Icelandic waters: temporal stability

Ó. D. B. Jónsdóttira, A. K. Daníelsdóttirb, and G. Nævdalc

a Marine Research Institute, Division of Population Genetics Keldnaholti, 112, Reykjavík, Iceland
b Marine Research Institute, Division of Population Genetics Keldnaholti, 112, Reykjavík, Iceland
c Institute for Fisheries and Marine Biology, High Technology Center N-5020, Bergen, Norway

Correspondence to A. K. Daníelsdóttir; tel: +354 570 7200; fax: +354 570 7111; email: andan{at}iti.is

Temporal variability in genetic structure of Atlantic cod was investigated at two locations (Loftstaðahraun and Kantur) on the main cod spawning grounds off south Iceland using synaptophysin (Syp I) and haemoglobin as genetic markers. During the spawning season (late March and early April) cod were sampled at each sampling location and then at the same locations two to four weeks later, during two consecutive years (1997 and 1998). Significant genetic differences were found at the Syp I locus between the two samples (Loftstaðahraun and Kantur) and the difference was temporally stable. Very low variation was found in the haemoglobin and no temporal changes were found for this marker. The results strongly indicates that cod in south Icelandic waters do not belong to one panmictic population and that this genetic difference is stable from year-to-year.

Keywords: Gadus morhua, Iceland, genetic differentiation, temporal stability

Received 4 November 1999; accepted 4 July 2000.


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