Genetic structure of a commercially exploited bivalve, the great scallop Pecten maximus, along the European coasts

Type Article
Date 2016-02
Language English
Author(s) Morvezen Romain1, Charrier Gregory1, Boudry PierreORCID2, Chauvaud Laurent1, Breton Florian3, Strand Oivind4, Laroche Jean1
Affiliation(s) 1 : Inst Univ Europeen Mer, Lab Sci Environm Marin, UMR LEMAR UBO CNRS IRD Ifremer 6539, Technopole Brest Iroise, F-29280 Plouzane, France.
2 : IFREMER, Lab Sci Environm Marin, UMR LEMAR UBO CNRS IRD Ifremer 6539, F-29280 Plouzane, France.
3 : Ecloserie Tinduff, F-29470 Port Du Tinduff, Plougastel Daou, France.
4 : Inst Marine Res, N-5817 Bergen, Norway.
Source Conservation Genetics (1566-0621) (Springer), 2016-02 , Vol. 17 , N. 1 , P. 57-67
DOI 10.1007/s10592-015-0760-y
WOS© Times Cited 21
Keyword(s) Great scallop, Pecten maximus, Microsatellites, Population genetics, Aquaculture
Abstract The great scallop Pecten maximus is harvested in several European countries and fisheries targeting this species are severely regulated by fishing quotas. In addition, hatchery-based population enhancement has been developed in some countries to provide alternative or complementary production. The genetic structure of wild populations of P. maximus and the potential impact of aquaculture on the genetic diversity of this species remains poorly documented. In this study, we explored the genetic structure of P. maximus using 12 microsatellite markers, considering 14 populations sampled from Galicia (Spain) to the North of Norway, and one population of Pecten jacobaeus (L., 1758) from the Lion Gulf (Mediterranean Sea). Results indicated a clear differentiation between Norwegian and Atlantic (from Ireland to Spain) populations, but very little to no difference between populations within these two groups. A decrease of the genetic diversity was observed with latitude. No significant reduction of the genetic diversity was observed in the Bay of Brest, where hatchery-based population enhancement has been performed intensively since 1983. Our results are discussed in the light of the inferred recent evolutionary history, phylogeography and connectivity of populations in Europe, and of the phenotypic variability reported in previous studies between northern and southern populations.
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Morvezen Romain, Charrier Gregory, Boudry Pierre, Chauvaud Laurent, Breton Florian, Strand Oivind, Laroche Jean (2016). Genetic structure of a commercially exploited bivalve, the great scallop Pecten maximus, along the European coasts. Conservation Genetics, 17(1), 57-67. Publisher's official version : https://doi.org/10.1007/s10592-015-0760-y , Open Access version : https://archimer.ifremer.fr/doc/00311/42251/