Journal Article

Loss of regional population structure in Atlantic salmon, <i>Salmo salar</i> L., following stocking

Fernando Ayllon, Jose L. Martinez and Eva Garcia-Vazquez

in ICES Journal of Marine Science

Published on behalf of ICES/CIEM

Volume 63, issue 7, pages 1269-1273
Published in print January 2006 | ISSN: 1054-3139
Published online January 2006 | e-ISSN: 1095-9289 | DOI: https://dx.doi.org/10.1016/j.icesjms.2006.03.023
Loss of regional population structure in Atlantic salmon, Salmo salar L., following stocking

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Many wild Atlantic salmon populations have been stocked with cultured fish during the past century. To evaluate the degree and the direction of the resulting genetic changes in wild southern European populations of Atlantic salmon, the variation at microsatellite loci was examined in historical and modern scale samples from five Spanish and two French rivers. Significant genetic differentiation between neighbouring rivers, which is typical of Atlantic salmon and which existed before stocking, appears to have been lost after only a decade of stocking with fish of foreign origin. Apparent introgression of foreign-origin genes into local gene pools was detected in the populations studied. These results indicate that stocking risks the loss of genetic diversity in wild salmon populations.

Keywords: Atlantic salmon; genetic variation; microsatellite loci; population structure; regional diversity; stocking

Journal Article.  2818 words.  Illustrated.

Subjects: Environmental Science ; Marine and Estuarine Biology

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