Genetic differentiation among Atlantic cod (Gadus morhua L.) in Icelandic waters: temporal stability | Zendy

Ólöf D.B. Jónsdóttir | Zendy

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

Author(s) -

Ólöf D.B. Jónsdóttir

Publication year - 2001

Publication title -

ices journal of marine science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.348

H-Index - 117

eISSN - 1095-9289

pISSN - 1054-3139

DOI - 10.1006/jmsc.2000.0995

Subject(s) - gadus , atlantic cod , panmixia , biology , genetic variation , population , genetic variability , zoology , fishery , genetic structure , ecology , fish <actinopterygii> , genetics , gene , demography , sociology , genotype

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. 2001 International Council for the Exploration of the Sea

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