FN Archimer Export Format PT J TI Stepping up to genome scan allows stock differentiation in the worldwide distributed blue shark Prionace glauca BT AF Nikolic, Natacha Devloo‐Delva, Floriaan Bailleul, Diane Noskova, Ekaterina Rougeux, Clément Delord, Chrystelle Borsa, Philippe Liautard‐Haag, Cathy Hassan, Mohamad Marie, Amandine D. Feutry, Pierre Grewe, Peter Davies, Campbell Farley, Jessica Fernando, Daniel Biton‐Porsmoguer, Sebastian Poisson, Francois Parker, Denham Leone, Agostino Aulich, Jorden Lansdell, Matt Marsac, Francis ARNAUD-HAOND, Sophie AS 1:2,3,14;2:4,5;3:1;4:6;5:7;6:14;7:8;8:14;9:1,9;10:3;11:4;12:4;13:4;14:4;15:10;16:11;17:1;18:12,13;19:1;20:4;21:4;22:14;23:1; FF 1:;2:;3:PDG-RBE-MARBEC-LHM;4:;5:;6:;7:;8:;9:PDG-RBE-MARBEC-LEGPM;10:;11:;12:;13:;14:;15:;16:;17:PDG-RBE-MARBEC-LHM;18:;19:PDG-RBE-MARBEC-LEGPM;20:;21:;22:;23:PDG-RBE-MARBEC-LEGPM; C1 UMR MARBEC University of Montpellier, IRD, Ifremer, CNRS Sète, France INRAE Ecobiop, AQUA Saint‐Pée‐sur‐Nivelle, France ARBRE Agence de Recherche pour la Biodiversité à la Réunion Saint‐Gilles,France CSIRO Environment Hobart Tasmania, Australia School of Natural Sciences—Quantitative Marine Science University of Tasmania Hobart Tasmania ,Australia Computer Technologies Laboratory ITMO University St Petersburg, Russia University of Calgary Calgary ,Canada Institut de recherche pour le développement UMR ENTROPIE Montpellier, France Animal Production Department Tishreen University Latakia, Syria Blue Resources Trust Colombo, Sri Lanka French Biodiversity Agency (OFB) Channel and North Sea Delegation Le Havre ,France Department of Forestry Fisheries and the Environment, (DFFE) Cape Town ,South Africa Department of Biological Sciences University of Cape Town Rondebosch ,South Africa UMR MARBEC University of Montpellier, IRD, Ifremer, CNRS Sète, France C2 IFREMER, FRANCE INRAE, FRANCE ARBRE, FRANCE CSIRO, AUSTRALIA UNIV TASMANIA, AUSTRALIA UNIV ST PETERSBURG, RUSSIA UNIV CALGARY, CANADA IRD, FRANCE UNIV TISHREEN, SYRIA BLUE RESOURCES TRUST, SRI LANKA OFB, FRANCE DFFE, SOUTH AFRICA UNIV CAPE TOWN, SOUTH AFRICA IRD, FRANCE SI SETE SE PDG-RBE-MARBEC-LHM PDG-RBE-MARBEC-LEGPM UM MARBEC ENTROPIE IN WOS Ifremer UMR WOS Cotutelle UMR copubli-france copubli-p187 copubli-int-hors-europe copubli-sud IF 4.9 TC 6 UR https://archimer.ifremer.fr/doc/00814/92596/98884.pdf https://archimer.ifremer.fr/doc/00814/92596/98885.pdf https://archimer.ifremer.fr/doc/00814/92596/98886.pdf LA English DT Article DE ;blue shark;bycatch;genome scans;pelagic;population genetics;SNPs;stock differentiation and assessment AB The blue shark Prionace glauca is a top predator with one of the widest geographical distributions of any shark species. It is classified as Critically Endangered in the Mediterranean Sea, and Near Threatened globally. Previous genetic studies did not reject the null hypothesis of a single global population. The blue shark was proposed as a possible archetype of the “grey zone of population differentiation,” coined to designate cases where population structure may be too recent or too faint to be detected using a limited set of markers. Here, blue shark samples collected throughout its global range were sequenced using a specific RAD method (DArTseq), which recovered 37,655 genome-wide single nucleotide polymorphisms (SNPs). Two main groups emerged, with Mediterranean Sea and northern Atlantic samples (Northern population) differentiated significantly from the Indo-west Pacific samples (Southern population). Significant pairwise FST values indicated further genetic differentiation within the Atlantic Ocean, and between the Atlantic Ocean and the Mediterranean Sea. Reconstruction of recent demographic history suggested divergence between Northern and Southern populations occurred about 500 generations ago and revealed a drastic reduction in effective population size from a large ancestral population. Our results illustrate the power of genome scans to detect population structure and reconstruct demographic history in highly migratory marine species. Given that the management plans of the blue shark (targeted or bycatch) fisheries currently assume panmictic regional stocks, we strongly recommend that the results presented here be considered in future stock assessments and conservation strategies. PY 2023 PD MAR SO Molecular Ecology SN 0962-1083 PU Wiley VL 32 IS 5 UT 000903673900001 BP 1000 EP 1019 DI 10.1111/mec.16822 ID 92596 ER EF