1. Very high genetic fragmentation in a large marine fish, the meagreArgyrosomus regius(Sciaenidae, Perciformes) : impact of reproductive migration, oceanographic barriers and ecological factors
- Author
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Pierrick Haffray, Bilge Karahan-Nomm, Nuno Prista, Gérard Castelnaud, Jean-Sébastien Bruant, Philippe Balma, François Bonhomme, Mahfoud Ould Taleb Sidi, Rachid Malha, Sherif Sadek, Moshira Hassan, Kutsal Gamsız, Ege Üniversitesi, Institut National de la Recherche Agronomique (INRA), Institut Mauritanien de Recherches Océanographiques et des Pêches (IMROP), UNIVERSIDADE DE LISBOA CENTRO DE OCEANOGRAFIA LISBOA PRT, Partenaires IRSTEA, Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), REEF CHECK BREMEN DEU, Ecosystèmes estuariens et poissons migrateurs amphihalins (UR EPBX), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), EGE UNIVERSITY FISHERIES FACULTY IZMIR TUR, FMD LA BREE LES BAINS FRA, LES POISSONS DU SOLEIL BALARUC LES BAINS FRA, Centre National de la Recherche Scientifique (CNRS), FMD, Les Poissons du Soleil, Bureau des Ressources genetiques from the French Ministry of Environment and Sustainable Development (MEDD), European Union (FEP) [3058-2008], FCT [BD/12550/2003], and CORV [DGPA-MARE: 22-05-01-FDR-00036]
- Subjects
0106 biological sciences ,microsatellite ,Aquatic Science ,Argyrosomus regius ,Sciaenidae ,010603 evolutionary biology ,01 natural sciences ,Perciformes ,Sciaenids ,Mediterranean sea ,Population differentiation ,Linkage disequilibrium ,Genetic variation ,14. Life underwater ,Microsatellites ,Pseudotolithus ,sciaenid ,geography ,geography.geographical_feature_category ,biology ,Ecology ,010604 marine biology & hydrobiology ,Argyrosomus ,Estuary ,biology.organism_classification ,Fishery ,Umbrina ,[SDE]Environmental Sciences ,Biological dispersal ,Drum - Abstract
Chantier qualité GA; International audience; The meagre Argyrosomus regius is a large Sciaenid fish known to reproduce in the eastern Atlantic and Mediterranean Sea in just five distinct and restricted geographic areas: along the Mauritanian coast and at estuary openings (Gironde, Tagus, Guadalquivir and Nile). The biological traits of A. regius (high dispersal capabilities, high fecundity, long larval phase, overlapping generations, reproduction until 40 years of age) are, in principle, favourable to high gene flow, which should lead to genetic homogeneity over large geographic scales. Nevertheless, the high geographic distances between the few reproductive areas leads one ask whether there is genetic differentiation in this species. In the present study, the genetic differentiation of the wild A. regius was investigated across most of its natural range from the Atlantic Ocean (France, Portugal, Spain, Mauritania) to the Mediterranean Sea (Egypt, Turkey), using 11 microsatellite markers previously identified in another Sciaenid, the red drum Sciaenops ocellatus. At least two very distinct groups could be identified, separated by the Gibraltar Strait. Genetic divergences (FST values) were intermediate between the Atlantic samples (0.012–0.041), high between Egypt and the Atlantic (0.06–0.107) or Aegean Sea (0.081) and extremely high between the Aegean Sea and the Atlantic (0.098–0.168). A. regius exhibited a very high level of genetic differentiation rarely reported in marine fishes. These results also demonstrate the existence of a sixth independent spawning area in the Menderes delta (Turkey). Factors potentially involved in this very high genetic fragmentation are discussed, including physical barriers, glaciation pulses and biological traits.
- Published
- 2012