FN Archimer Export Format PT J TI Behavioral and trophic segregations help the Tahiti petrel to cope with the abundance of wedge-tailed shearwater when foraging in oligotrophic tropical waters BT AF Ravache, Andreas Bourgeois, Karen Weimerskirch, Henri Pagenaud, Angélique de Grissac, Sophie Miller, Mark Dromzée, Sylvain Lorrain, Anne Allain, Valerie Bustamante, Paco Bylemans, Jonas Gleeson, Dianne Letourneur, Yves Vidal, Eric AS 1:1,2;2:2;3:3;4:1,2;5:3;6:4;7:;8:5;9:6;10:7,8;11:9,10;12:9;13:11;14:1; FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;12:;13:;14:; C1 UMR ENTROPIE (IRD, Université de La Réunion, CNRS, Université de La Nouvelle-Calédonie, Ifremer), Centre IRD Nouméa, BP A5, 98848, Nouméa, New Caledonia IMBE, Aix-Marseille Université, CNRS, IRD, Avignon Université, Centre IRD Nouméa, BP A5, 98848, Nouméa Cedex, New Caledonia Centres d’Etudes Biologiques de Chizé – CNRS, Villiers-en-Bois, France School of Biology, University of Leeds, Leeds, UK IRD, Univ Brest, CNRS, Ifremer, LEMAR, 29280, Plouzané, France The Pacific Community (SPC), BP D5, 98848, Nouméa, New Caledonia Littoral Environnement et Sociétés (LIENSs), UMR 7266, CNRS - La Rochelle Université, 2 Rue Olympe de Gouges, 17000, La Rochelle, France Institut Universitaire de France (IUF), 1 rue Descartes, 75005, Paris, France Institute for Applied Ecology, University of Canberra, Bruce, ACT, Australia Department of Ecology and Evolution, Biophore, University of Lausanne, Lausanne, Switzerland UMR ENTROPIE (IRD, Université de La Réunion, CNRS, Université de La Nouvelle-Calédonie, Ifremer), Université de La Nouvelle-Calédonie, BP R4, 98851, Nouméa Cedex, New Caledonia C2 IRD, FRANCE UNIV AIX MARSEILLE, FRANCE CNRS, FRANCE UNIV LEEDS, UK IRD, FRANCE SPC, FRANCE UNIV LA ROCHELLE, FRANCE INST UNIV FRANCE, FRANCE UNIV CANBERRA, AUSTRALIA UNIV LAUSANNE, SWITZERLAND UNIV LA REUNION, FRANCE UM LEMAR ENTROPIE IN WOS Cotutelle UMR DOAJ copubli-france copubli-europe copubli-univ-france copubli-int-hors-europe IF 4.379 TC 9 UR https://archimer.ifremer.fr/doc/00651/76287/77262.pdf https://archimer.ifremer.fr/doc/00651/76287/77263.xlsx https://archimer.ifremer.fr/doc/00651/76287/77264.docx LA English DT Article AB Two species breeding in sympatry are more likely to coexist if their ecological niches are segregated either in time, space or in trophic habits. Here, we combined GPS-tracking, stable isotope analysis and DNA metabarcoding analysis to understand how the rare Tahiti petrel Pseudobulweria rostrata (TP) copes with the very abundant (i.e. 500,000 breeding pairs) wedge-tailed shearwater Ardenna pacifica (WTS) when breeding in sympatry in a tropical area. WTS foraged in restricted areas along their path, while TP predominantly foraged using extensive search behavior, suggesting a more opportunistic foraging strategy. Interspecific overlap of foraging areas was higher than intraspecific overlap. Breeding seasons largely overlap between species during the study, but TP seems to be asynchronous breeders. TP fed upon prey with higher δ15N values than WTS, and their diet was mainly composed of deep-sea organisms. TP could feed upon dead prey floating at the surface while WTS preyed mainly upon fish species that generally move in schools. Our study highlights several segregating mechanisms (temporal, behavioral and trophic) that could facilitate the coexistence of the two species despite the predominant number of WTS, and provides the very first information on the foraging and trophic ecology of the poorly-known TP. PY 2020 PD SEP SO Scientific Reports SN 2045-2322 PU Springer Science and Business Media LLC VL 10 IS 1 UT 000573754900005 DI 10.1038/s41598-020-72206-0 ID 76287 ER EF