FN Archimer Export Format PT C TI Genome scans discriminate independent populations of the blue shark Prionace glauca BT AF NIKOLIC, Natacha Devloo-Delva, Floriaan BAILLEUL, Diane Noskova, Ekaterina Rougeux, Clément Liautard-Haag, Cathy Hassan, Mohamad Marie, Amandine Borsa, Philippe Feutry, Pierre Grewe, Peter Davies, Campbell Farley, Jessica Fernando, Daniel Biton Porsmoguer, Sébastien POISSON, Francois Parker, Denham Aulich, Jorden Lansdell, Matt MARSAC, Francis ARNAUD-HAOND, Sophie AS 1:1,2,3;2:4,5;3:6;4:7;5:8;6:9;7:9,10;8:3,11;9:12;10:4;11:4;12:4;13:4;14:13;15:15,16;16:9;17:17;18:4;19:4;20:1;21:9; FF 1:;2:;3:PDG-RBE-MARBEC-LHM;4:;5:;6:;7:;8:;9:;10:;11:;12:;13:;14:;15:;16:PDG-RBE-MARBEC-LHM;17:;18:;19:;20:;21:PDG-RBE-MARBEC-LHM; C1 IRD, UMR MARBEC, Sète, France INRAE, Ecobiop, St-Pée-sur-Nivelle, France ARBRE, Agence de Recherche pour la Biodiversité à la Réunion, Saint-Gilles, La Réunion CSIRO Oceans and Atmosphere, Hobart, Australia School of Natural Sciences – Quantitative Marine Science, University of Tasmania, Hobart, 7001 TAS, Australia INRAE, Castanet Tolosan, France Computer Technologies Laboratory, ITMO University. St Petersburg, Russia University of Calgary, Calgary, Canada IFREMER, UMR MARBEC, Sète, France Animal Production Department, Faculty of Agriculture, Tishreen University, Syria ESE, Ecology and Ecosystems Health, Agrocampus Ouest, INRAE, 35042 Rennes, France IRD, UMR ENTROPIE, Montpellier, France Blue Resources Trust, Colombo 00700, Sri Lank University of Girona, Institute of Aquatic Ecology Aix-Marseille University, Mediterranean Institute of Oceanography (MIO), Marseille, France OFB, Office Français de la Biodiversité, Délégation Manche Mer du Nord, Le Havre, France South African Department of Environment, Forestry and Fisheries (DEFF), Cape Town, South Africa C2 IRD, FRANCE INRAE, FRANCE ARBRE, LA RÉUNION CSIRO, AUSTRALIA UNIV TASMANIA, AUSTRALIA INRAE, FRANCE UNIV ITMO, RUSSIA UNIV CALGARY, CANADA IFREMER, FRANCE UNIV TISHREEN, SYRIA AGROCAMPUS OUEST, FRANCE IRD, FRANCE BLUE RESOURCES TRUST, SRI LANK UNIV GIRONA, INSTITUTE OF AQUATIC ECOLOGY UNIV AIX MARSEILLE, FRANCE OFB, FRANCE DEFF, SOUTH AFRICA SI SETE SE PDG-RBE-MARBEC-LHM IRD UM MARBEC ENTROPIE UR https://archimer.ifremer.fr/doc/00645/75701/76606.pdf LA English DT Proceedings paper AB The blue shark Prionace glauca is a cosmopolitan species that inhabits all oceans worldwide except the poles. Several IUCN regional assessments have classified   it as Near Threatened, mostly due to overfishing. Previous genetic studies that have used classical genetic markers failed to reject the hypothesis that the species is a single worldwide population (panmixia). As such, the blue shark was proposed to be an archetype of the ‘grey zone of population differentiation’, named to signify those cases common in the marine realm, where the split among population is too recent or too faint to be detected using classical genetic markers. Here, samples collected across the majority of the global range of blue shark were sequenced (using a specific genome scan method named DArTseq) and screened through genome scan using 37,655 single nucleotide polymorphisms. Significant differences distinguished locations from the northern (Mediterranean and North Atlantic) vs. southern (southeastern Atlantic, Indian Ocean and southwestern Pacific) oceanic regions. Furthermore, FST values were significant, albeit low, between locations from distinct regions within the Atlantic Ocean (northern vs. northeastern vs. southeastern Atlantic). In addition, FST values were significant between these Atlantic locations and Mediterranean, Indian, and Pacific locations. These results illustrate the power of genome scans to delineate independent populations in marine species and to accurately identify distinct management units. PY 2020 CT WPEB16 - 15th Working Party on Ecosystems and Bycatch. 07/09/2020 -10/09/2020, Online.IOTC-2020-WPEB16-14, 18p. ID 75701 ER EF