Absence of spatial genetic structure in common dentex (Dentex dentex Linnaeus, 1758) in the Mediterranean Sea as evidenced by nuclear and mitochondrial molecular markers

• Published in: PLOS ONE
• Main Authors: Viret, Alexiane, Tsaparis, Dimitris, Tsigenopoulos, Costas, Berrebi, Patrick, Sabatini, Andrea, Arculeo, Marco, Fassatoui, Chiheb, Magoulas, Antonios, Marengo, Michel, Morales-Nin, Beatriz, Caill-Milly, Nathalie, Durieux, Eric
• Other Authors: Institut des Sciences de l'Evolution de Montpellier (UMR ISEM), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École Pratique des Hautes Études (EPHE), Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Montpellier (UM)-Institut de recherche pour le développement IRD : UR226-Centre National de la Recherche Scientifique (CNRS), Hellenic Centre for Marine Research (HCMR), Università degli Studi di Cagliari = University of Cagliari (UniCa), Università degli studi di Palermo - University of Palermo, Institut National Agronomique de Tunisie (INAT), Ecosystèmes et Ressources Aquatiques (UR03AGRO1), Institut National Agronomique de Tunisie, Sciences pour l'environnement (SPE), Université Pascal Paoli (UPP)-Centre National de la Recherche Scientifique (CNRS), Stella Mare, Institut Mediterrani d'Estudis Avancats (IMEDEA), Consejo Superior de Investigaciones Cientificas España = Spanish National Research Council Spain (CSIC)-Universitat de les Illes Balears = Universidad de las Islas Baleares = University of the Balearic Islands (UIB), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2018
• Subjects: Haplotypes; Phylogeography; Population genetics; Atlantic Ocean; Marine fish; Mitochondrial DNA; Polymerase chain reaction; Mediterranean Sea; [SDV.GEN.GA]Life Sciences [q-bio]/Genetics/Animal genetics; [SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE]; Northeast Atlantic
• Online Access: https://hal.umontpellier.fr/hal-03117680; https://hal.umontpellier.fr/hal-03117680/document; https://hal.umontpellier.fr/hal-03117680/file/pone.0203866.pdf; https://doi.org/10.1371/journal.pone.0203866

International audience The common dentex, Dentex dentex, is a fish species which inhabits marine environments in the Mediterranean and Northeast Atlantic regions. This is an important species from an ecological, economic and conservation perspective, however critical information on its population genetic structure is lacking. Most samples were obtained from the Mediterranean Sea (17 sites) with an emphasis around Corsica (5 sites), plus one Atlantic Ocean site. This provided an opportunity to examine genetic structuring at local and broader scales to provide science based data for the management of fishing stocks in the region. Two mitochondrial regions were examined (D-loop and COI) along with eight microsatellite loci. The COI data was combined with publicly available sequences and demonstrated past misidentification of common dentex. All markers indicated the absence of population genetic structure from the Bay of Biscay to the eastern Mediterranean Sea. Bayesian approaches, as well as the statistical tests performed on the allelic frequencies from microsatellite loci, indicated low differentiation between samples; there was only a slight (p = 0.05) indication of isolation by distance. Common dentex is a marine fish species with a unique panmictic population in the Mediterranean and likely in the Atlantic Ocean as well.