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dc.contributor.authorEscalle, Lauriane-
dc.contributor.authorCapietto, Anna-
dc.contributor.authorChavance, Pierre-
dc.contributor.authorDubroca, Laurent-
dc.contributor.authorDe Molina, Alicia Delgado-
dc.contributor.authorMurua, Hilario-
dc.contributor.authorGaertner, Daniel-
dc.contributor.authorRomanov, Evgeny-
dc.contributor.authorSpitz, Jerome-
dc.contributor.authorKiszka, Jeremy J.-
dc.contributor.authorDamiano, Alain-
dc.contributor.authorMerigot, Bastien-
dc.contributor.authorFloch, Laurent-
dc.date.accessioned2017-08-23T08:52:10Z-
dc.date.available2017-08-23T08:52:10Z-
dc.date.issued2015-
dc.identifierISI:000350667800019-
dc.identifier.citationMARINE ECOLOGY PROGRESS SERIES, 2015, 522, 255-268-
dc.identifier.issn0171-8630-
dc.identifier.urihttp://dspace.azti.es/handle/24689/261-
dc.description.abstractFisheries bycatch is considered to be one of the most significant causes of mortality for many marine species, including vulnerable megafauna. In the open ocean, tuna purse seiners are known to use several cetacean species to detect tuna schools. This exposes the cetaceans to encirclement which can lead to incidental injury or death. While interactions between fishers and cetaceans have been well documented in the eastern tropical Pacific Ocean, little is known about these interactions and potential mortalities in the tropical Atlantic and Indian Oceans. Here, we provide the first quantification of these interactions in both oceans by analyzing a large database of captain's logbooks (1980 to 2011) and observations collected by onboard scientific observers (1995 to 2011). Distribution maps of sightings per unit effort highlighted main areas of relatively high co-occurrence: east of the Seychelles (December to March), the Mozambique Channel (April to May) and the offshore waters of Gabon (April to September). The percentage of cetacean-associated fishing sets was around 3\% in both oceans and datasets whereas 0.6\% of sets had cetaceans encircled. Of the 194 cetaceans encircled in a purse seine net (122 baleen whales, 72 delphinids), immediate apparent survival rates were high (Atlantic: 92\%, Indian: 100\%). Among recorded mortalities, 8 involved pantropical spotted dolphins Stenella attenuata and 3 involved humpback whales Megaptera novaeangliae. These high survival rates suggest that setting nets close to cetaceans has a low immediate apparent impact on the species involved. Our findings will contribute to the development of an ecosystem approach to managing fisheries and accurate cetacean conservation measures.-
dc.description.sponsorshipWe thank P. Corkeron, L.T. Ballance and an anonymous reviewer for their constructive comments on a previous version of the manuscript. We are grateful to the fishing masters and scientific observers involved in the data collection, to the fishing companies, and to Terres Australes et Antarctiques Francaises (TAAF) for their close collaboration with European fisheries scientists (IRD/IEO/AZTI). The collection of logbook data was supported by the French and Spanish National Fisheries Administrations and the scientific observer programs were co-financed by the European Data Collection Framework (Regulation \[CE] 199/2008) and various scientific institutions (IRD/IEO/AZTI). We thank P. Cauquil, C. Rodriguez (IRD), S. Rodriguez (IEO), and J. Ruiz (AZTI) for their valuable database support and P. Dewals (IRD) for conducting the interviews with vessel captains. We are also grateful to participants of the Sub-Committee on Ecosystems of the ICCAT and Working Party on the Ecosystems and Bycatch of the IOTC for their comments on the draft manuscript. Jane Alpine and Anne-Elise Nieblas provided English language editing for this paper.-
dc.language.isoeng-
dc.publisherINTER-RESEARCH-
dc.subjectApparent survival-
dc.subjectBycatch-
dc.subjectMarine mammals-
dc.subjectFishery impact-
dc.subjectMarine conservation-
dc.subjectMegafauna-
dc.subjectEASTERN TROPICAL PACIFIC-
dc.subjectMARINE MAMMALS-
dc.subjectWHALE SHARK-
dc.subjectBYCATCH-
dc.subjectSEA-
dc.subjectECOSYSTEMS-
dc.subjectMEGAFAUNA-
dc.subjectDOLPHINS-
dc.subjectIMPACTS-
dc.subjectPATTERNS-
dc.titleCetaceans and tuna purse seine fisheries in the Atlantic and Indian Oceans: interactions but few mortalities-
dc.typeArticle-
dc.identifier.journalMARINE ECOLOGY PROGRESS SERIES-
dc.format.page255-268-
dc.format.volume522-
dc.contributor.funderFrench and Spanish National Fisheries Administrations-
dc.contributor.funderEuropean Data Collection Framework (Regulation) \[\[CE] 199/2008]-
dc.identifier.e-issn1616-1599-
dc.identifier.doi10.3354/meps11149-
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