. Noddies, Noddy was inferred to forage preferentially ACKNOWLEDGMENTS We are grateful to Bouteiller for excellent assistance in sorting and identifying prey items; to D. Ponton (IRD) for making a collection of reference fish specimens available to us; to P. Marchesiello and C. Menkes for providing useful information on the oceanography of the eastern Coral Sea. P. Brun skippered the boat to Kouaré Islet; J. Burrows helped in editing a former version of this manuscript; anonymous reviewers gave many useful suggestions. Conceived and designed the experiments: PV, VB, PB, Contributed materials / analysis tools: PV, PB. Did the experiments: PV, PB. Analyzed the data: PB. Wrote the paper: PV, VB, PB. This study was supported by Direction des ressources naturelles of New Caledonia's Province Sud, CNRS, and IRD. The funders had no role in study design, data collection and analysis, preparation of the manuscript

G. Alory, A. Vega, A. Ganachaud, and M. Despinoy, Influence of upwelling, subsurface stratification, and heat fluxes on coastal sea surface temperature off southwestern New Caledonia, Journal of Geophysical Research, vol.2, issue.C7, p.7023, 2006.
DOI : 10.1080/07055900.1995.9649548

URL : https://hal.archives-ouvertes.fr/hal-00280369

N. P. Ashmole, The black noddy Anous tenuirostris on Ascension Island. Part 1. General biology, Ibis, vol.103, pp.235-273, 1962.

N. P. Ashmole, Seabird ecology and the marine environment. Pages 223-286 in Avian Biology, 1971.

N. P. Ashmole and M. J. Ashmole, Comparative feeding ecology of seabirds of a tropical oceanic island, Natural History Bulletin, vol.24, pp.1-131, 1967.

E. S. Bridge, A. W. Jones, and A. J. Baker, A phylogenetic framework for the terns (Sternini) inferred from mtDNA sequences: implications for taxonomy and plumage evolution, Molecular Phylogenetics and Evolution, vol.35, issue.2, pp.459-469, 2005.
DOI : 10.1016/j.ympev.2004.12.010

K. E. Carpenter and V. H. Niem, FAO Species identification guide for fishery purposes. The living marine resources of the western central Pacific Batoid fishes, chimaeras and bony fishes part 1 (Elopidae to Linophrynidae), pp.1397-2068, 1999.

K. E. Carpenter and V. H. Niem, FAO Species identification guide for fishery purposes.The living marine resources of the western central Pacific Bony fishes part 3 (Menidae to Pomacentridae), pp.2791-3380, 2001.

J. W. Chardine and R. D. Morris, Brown noddy (Anous stolidus). No. 220 in The birds of North Academy of Natural Sciences and American Ornithologists, 1996.

V. Chevillotte, P. Douillet, G. Cabioch, Y. Lafoy, Y. Lagabrielle et al., ??volution g??omorphologique de l'avant-pays du Sud-Ouest de la Nouvelle-Cal??donie durant les derniers cycles glaciaires, Comptes Rendus Geoscience, vol.337, issue.7, pp.695-701, 2005.
DOI : 10.1016/j.crte.2005.02.008

C. Naves, L. , N. Ferreira-brusque, and C. M. Vooren, Feeding ecology of Sula leucogaster, Anous stolidus and Anous minutus at Saint Peter and Saint Paul's Rocks, Brazil, Ararajuba, vol.10, pp.21-30, 2002.

F. Conand, Biologie et écologie des poissons pélagiques du lagon de Nouvelle-Calédonie utilisables comme appât thonier, 1988.

D. Dorward and N. P. Ashmole, NOTES ON THE BIOLOGY OF THE BROWN NODDY ANOUS STOLIDUS ON ASCENSION ISLAND, Ibis, vol.5, issue.11, pp.447-457, 1963.
DOI : 10.1080/00306525.1954.9633408

V. H. Gauger, Black noddy (Anous minutus). No. 412 in The birds of North Academy of Natural Sciences and American Ornithologists, 1999.

C. S. Harrison, Seabirds of Hawaii, natural history and conservation, 1990.

C. S. Harrison, T. S. Hida, and M. P. Seki, Hawaiian seabird feeding ecology, Wildlife Monographs, vol.85, pp.1-71, 1983.

P. J. Higgins and S. J. , Handbook of Australian, New Zealand and Antarctic birds Snipe to pigeons, 1028.

K. Hulsman, The structure of seabird communities: an example from Australian waters In Seabirds and other marine vertebrates, pp.59-91, 1988.

K. E. Keller, A. D. Anders, S. A. Shaffer, M. A. Kappes, B. Flint et al., Seabirds. Pages 235-274 in A marine biogeographic assessment of the northwestern Hawaiian Islands. NOAA Technical Memorandum NOS NCCOS 84, Prepared by NCCOS's Biogeography Branch in cooperation with the Office of National Marine Sanctuaries Papahanaumokuakea Marine National Monument. Silver Springs, MD. 363 pp, 2009.

G. M. Mace and P. H. Harvey, Energetic Constraints on Home-Range Size, The American Naturalist, vol.121, issue.1, pp.120-132, 1983.
DOI : 10.1086/284043

P. Marchesiello, J. Lefèvre, A. Vega, X. Couvelard, and C. Menkes, Coastal upwelling, circulation and heat balance around New Caledonia???s barrier reef, Marine Pollution Bulletin, vol.61, issue.7-12, pp.432-448, 2010.
DOI : 10.1016/j.marpolbul.2010.06.043

M. Pandolfi-benoit and V. Bretagnolle, Seabirds of the Southern Lagoon of New Caledonia; Distribution, Abundance and Threats, Waterbirds, vol.25, issue.2, pp.202-213, 2002.
DOI : 10.1675/1524-4695(2002)025[0202:SOTSLO]2.0.CO;2

URL : https://hal.archives-ouvertes.fr/hal-00192194

N. V. Parin, Exocoetidae, flyingfishes, The living marine resources of the Western Central Pacific, pp.2162-2179, 2001.

J. Ramos, A. Maul, J. Bowler, L. Wood, R. Threadgold et al., Annual variation in laying date and breeding success of Brown Noddies on Aride Island, Seychelles, Emu - Austral Ornithology, vol.95, issue.1, pp.81-86, 2006.
DOI : 10.1038/19505

M. P. Seki and C. S. Harrison, Feeding ecology of two subtropical seabird species at French Frigate Shoals, Hawaii. Bulletin of Marine Science, vol.45, pp.52-67, 1989.

A. Singh, T. Delcroix, and S. Cravatte, Contrasting the flavors of El Ni??o-Southern Oscillation using sea surface salinity observations, Journal of Geophysical Research, vol.103, issue.7263, p.6016, 2011.
DOI : 10.1007/s00704-010-0307-6

C. A. Surman and R. D. Wooller, Comparative foraging ecology of five sympatric terns at a sub-tropical island in the eastern Indian Ocean, Journal of Zoology, vol.58, issue.3, pp.219-230, 2003.
DOI : 10.1080/00306525.1987.9634141

M. K. Tarburton, Migration and Breeding Strategies of the Black Noddy, Fiji, Emu - Austral Ornithology, vol.20, issue.1, pp.50-52, 1987.
DOI : 10.1093/icb/20.2.427