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Mar Biol (2016) 163:219DOI 10.1007/s00227-016-2999-3
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Web End = Habitat availability and geographic isolation as potential drivers of population structure in an oceanic dolphin in the Southwest Indian Ocean
Amlia Viricel1 Benoit SimonBouhet1,7 Laura Ceyrac2 Violaine DulauDrouot3 Per Berggren4 Omar A. Amir5 Narriman S. Jiddawi6 Philippe Mongin8 Jeremy J. Kiszka1,2,9
Abstract Delphinid populations show highly variable patterns of genetic diversity and population structure. Previous studies indicate that habitat discontinuities and geographic isolation are major drivers of population division in cetaceans. Spinner dolphins (Stenella longirostris) are distributed in all tropical oceans, but they are particularly common around islands and atolls. This species occurs in shallow waters at daytime to rest and socialise, and feeds on offshore mesopelagic prey overnight. Here, we investigated the genetic population structure of spinner dolphins in the Southwest Indian Ocean along a westeast geographic gradient, from eastern Africa to the Mascarene archipelago. We combined analyses of 12 microsatellite
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* Jeremy J. Kiszka [email protected]
1 LIttoral Environnement et Socits (LIENSs), UMR 7266 CNRS-Universit de la Rochelle, Institut du Littoral et de lEnvironnement, 2 Rue Olympe de Gouges, 17000 La Rochelle, France
2 Institut de Recherche pour le Dveloppement (IRD), UMR MARBEC (MARine Biodiversity, Exploitationand Conservation), Centre de Recherche Halieutique Mditerranenne et Tropicale, BP 171, 34203 Ste Cedex, France
3 Globice Runion, 30 Chemin Parc Cabris, Grand Bois, 97410 Saint Pierre, La Runion, France
4 School of Marine Science and Technology, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
5 Ministry of Livestock and Fisheries, P. O. Box 295,
Nyangumi House, Maruhubi Street, Zanzibar, Tanzania
6 Institute of Marine Sciences, P.O. Box 668, Zanzibar,
Tanzania
7 Centre dEtudes Biologiques de Chiz (CEBC), UMR 7372
CNRS-Universit de la Rochelle, Institut du Littoral et de lEnvironnement, 2 Rue Olympe de Gouges, 17000 La Rochelle, France
8 Brigade Nature Ocean Indien, Parc de la Providence,
97400 Saint-Denis, La Runion, France
9 Present Address: Department of Biological Sciences, Florida
International University, 3000 NE 151st Street, North Miami, FL 33181, USA
Received: 2 May 2016 / Accepted: 23 September 2016 / Published...