FN Archimer Export Format PT J TI Connectivity and population structure of albacore tuna across southeast Atlantic and southwest Indian Oceans inferred from multidisciplinary methodology BT AF Nikolic, Natacha Montes, Iratxe Lalire, Maxime Puech, Alexis Bodin, Nathalie Arnaud-Haond, Sophie Kerwath, Sven Corse, Emmanuel Gaspar, Philippe Hollanda, Stéphanie Bourjea, Jerome West, Wendy Bonhommeau, Sylvain AS 1:1,2,3;2:4;3:5;4:1;5:6,11,12;6:7;7:8,9;8:2,13;9:5,10;10:11;11:1;12:8;13:1; FF 1:;2:;3:;4:PDG-RBE-DOI;5:;6:PDG-RBE-MARBEC-LHM;7:;8:;9:;10:;11:PDG-RBE-MARBEC-LHM;12:;13:PDG-RBE-DOI; C1 Institut Français de Recherche pour l’Exploitation de la Mer, Délégation de La Réunion, Rue Jean Bertho, BP 60, 97 822, Le Port Cedex, La Réunion, France ARBRE, Agence de Recherche pour la Biodiversité à la Réunion, 34 avenue de la Grande Ourse, 97434, Saint-Gilles, La Réunion, France IRD, UMR MARine Biodiversity Exploitation and Conservation (MARBEC), Saint-Clotilde, La Réunion, France Department of Genetics, Physical Anthropology and Animal Physiology, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, 48940, Leioa, Spain CLS, Sustainable Management of Marine Resources, 11 rue Hermès, 31520, Ramonville Saint-Agne, France IRD, UMR MARBEC, Fishing Port, Victoria, Seychelles IFREMER, Station de Sète, Avenue Jean Monnet, CS 30171, 34203, Sète Cedex, France Department of Environmental Affairs, Private Bag X2, Vlaeberg, 8018, South Africa Department of Biological Sciences, University of Cape Town, Rondebosch, Cape Town, 7701, South Africa Mercator Ocean, 10 rue Hermès, 31520, Ramonville Saint-Agne, France Seychelles Fishing Authority (SFA), Fishing Port, Victoria, Seychelles Sustainable Ocean Seychelles (SOS), BeauBelle, Mahe, Seychelles Centre Universitaire de Formation et de Recherche de Mayotte, MARBEC, 8 rue de l′Université BP53, 97660, Dembeni, Mayotte C2 IFREMER, FRANCE ARBRE, FRANCE IRD, FRANCE UNIV PAIS VASCO EHU, SPAIN CLS, FRANCE IRD, FRANCE IFREMER, FRANCE DPT ENVIRONM AFFAIRS, SOUTH AFRICA UNIV CAPE TOWN, SOUTH AFRICA MERCATOR OCEAN, FRANCE SEYCHELLES FISHING AUTHORITY (SFA), SEYCHELLES SUSTAINABLE OCEAN SEYCHELLES (SOS), SEYCHELLES UNIV MAYOTTE, FRANCE SI LA REUNION SETE SE PDG-RBE-DOI PDG-RBE-MARBEC-LHM UM MARBEC IN WOS Ifremer UPR WOS Ifremer UMR WOS Cotutelle UMR DOAJ copubli-france copubli-p187 copubli-europe copubli-univ-france copubli-int-hors-europe copubli-sud IF 4.379 TC 12 UR https://archimer.ifremer.fr/doc/00653/76483/77555.pdf https://archimer.ifremer.fr/doc/00653/76483/77556.pdf https://archimer.ifremer.fr/doc/00653/76483/77557.pdf LA English DT Article AB Albacore tuna (Thunnus alalunga) is an important target of tuna fisheries in the Atlantic and Indian Oceans. The commercial catch of albacore is the highest globally among all temperate tuna species, contributing around 6% in weight to global tuna catches over the last decade. The accurate assessment and management of this heavily exploited resource requires a robust understanding of the species’ biology and of the pattern of connectivity among oceanic regions, yet Indian Ocean albacore population dynamics remain poorly understood and its level of connectivity with the Atlantic Ocean population is uncertain. We analysed morphometrics and genetics of albacore (n = 1,874) in the southwest Indian (SWIO) and southeast Atlantic (SEAO) Oceans to investigate the connectivity and population structure. Furthermore, we examined the species’ dispersal potential by modelling particle drift through major oceanographic features. Males appear larger than females, except in South African waters, yet the length–weight relationship only showed significant male–female difference in one region (east of Madagascar and Reunion waters). The present study produced a genetic differentiation between the southeast Atlantic and southwest Indian Oceans, supporting their demographic independence. The particle drift models suggested dispersal potential of early life stages from SWIO to SEAO and adult or sub-adult migration from SEAO to SWIO. PY 2020 PD SEP SO Scientific Reports SN 2045-2322 PU Springer Science and Business Media LLC VL 10 IS 1 UT 000615372100002 DI 10.1038/s41598-020-72369-w ID 76483 ER EF