New insights on the population genetic structure of the great scallop (Pecten maximus) in the English Channel, coupling microsatellite data and demogenetic simulations

The great scallop (Pecten maximus) is a commercially important bivalve in Europe, particularly in the English Channel, where fisheries are managed at regional and local scales through the regulation of fishing effort. In the long term, knowledge about larval dispersal and gene flow between populatio...

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Bibliographic Details
Published in:	Aquatic conservation Vol. 30; no. 10; pp. 1841 - 1853
Main Authors:	Handal, William, Szostek, Claire, Hold, Natalie, Andrello, Marco, Thiébaut, Eric, Harney, Ewan, Lefebvre, Gwendoline, Borcier, Elodie, Jolivet, Aurélie, Nicolle, Amandine, Boyé, Aurélien, Foucher, Eric, Boudry, Pierre, Charrier, Grégory
Format:	Journal Article
Language:	English
Published:	Oxford Wiley Subscription Services, Inc 01-10-2020 Wiley
Subjects:	Animal biology Biology Computer simulation Coupling Dispersal Dispersion Empirical analysis English Channel Fisheries Fisheries management Fishing Fishing effort Fishing grounds Fishing zones Gene flow Genetic analysis genetic modelling genetic resources management Genetic structure great scallop Larvae Life Sciences low genetic structure Marine molluscs Microsatellites Mollusks Ocean, Atmosphere Pecten maximus Population Population biology Population genetics Population studies Populations Sciences of the Universe English Channel Great scallop Gene flow Microsatellites Genetic resources management Genetic modelling English Channel Low genetic structure
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Summary:	The great scallop (Pecten maximus) is a commercially important bivalve in Europe, particularly in the English Channel, where fisheries are managed at regional and local scales through the regulation of fishing effort. In the long term, knowledge about larval dispersal and gene flow between populations is essential to ensure proper stock management. Yet, previous population genetic studies have reported contradictory results. In this study, scallop samples collected across the main fishing grounds along the French and English coasts of the English Channel (20 samples with temporal replicates for three sites, n = 1059 individuals), and the population genetic structure was analysed using 13 microsatellite loci. Coupling empirical genetic data with demogenetic modelling based on a biophysical model simulating larval exchanges among scallop beds revealed a subtle genetic differentiation between south‐west English populations and the rest of the English Channel, which was consistent with larval dispersal simulations. The present study provides a step forward in the understanding of great scallop population biology in the English Channel, underlining the fact that even in a context of potentially high gene flow and recent divergence times since the end of the last glacial maximum, weak but significant spatial genetic structure can be identified at a regional scale.
ISSN:	1052-7613 1099-0755
DOI:	10.1002/aqc.3316