Journal Article

Genetic differentiation of blue whiting (<i>Micromesistius poutassou</i> Risso) populations at the extremes of the species range and at the Hebrides–Porcupine Bank spawning grounds

Anthony W. Ryan, Valeria Mattiangeli and Jarle Mork

in ICES Journal of Marine Science

Published on behalf of ICES/CIEM

Volume 62, issue 5, pages 948-955
Published in print January 2005 | ISSN: 1054-3139
Published online January 2005 | e-ISSN: 1095-9289 | DOI: https://dx.doi.org/10.1016/j.icesjms.2005.03.006
Genetic differentiation of blue whiting (Micromesistius poutassou Risso) populations at the extremes of the species range and at the Hebrides–Porcupine Bank spawning grounds

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The blue whiting, Micromesistius poutassou (Teleostei, Gadidae) is found between latitudes 26° and 82°N along the continental margin of the Northeast Atlantic, with smaller populations in the Northwest Atlantic and the Mediterranean. There is an annual spawning aggregation on the Porcupine Bank and Hebridean Shelf (west of Ireland and Scotland, respectively), where most of the blue whiting population of the Northeast Atlantic spawns. Analysis of samples from the Barents Sea, the Northeast Atlantic, and the Mediterranean (n = 850, 11 samples) using one minisatellite and five microsatellite loci revealed significant geographic heterogeneity and isolated populations at the extremes of the species range in the Barents Sea and the Mediterranean. Furthermore, there was evidence of genetic heterogeneity among samples taken during the spawning season on the Porcupine Bank and Hebridean Shelf, with highly significant differentiation between the samples taken in the Hebrides in 1992 and 1998.

Keywords: genetic differentiation; marine species; Micromesistius; microsatellites; minisatellites

Journal Article.  4232 words.  Illustrated.

Subjects: Environmental Science ; Marine and Estuarine Biology

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