Journal Article

Genetic differentiation among Atlantic cod (<i>Gadus morhua</i> L.) in Icelandic waters: temporal stability

Ó. D. B. Jónsdóttir, A. K. Daníelsdóttir and G. Nævdal

in ICES Journal of Marine Science

Published on behalf of ICES/CIEM

Volume 58, issue 1, pages 114-122
Published in print January 2001 | ISSN: 1054-3139
Published online January 2001 | e-ISSN: 1095-9289 | DOI: http://dx.doi.org/10.1006/jmsc.2000.0995
Genetic differentiation among Atlantic cod (Gadus morhua L.) in Icelandic waters: temporal stability

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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

Journal Article.  0 words. 

Subjects: Environmental Science ; Marine and Estuarine Biology

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