@article{PAR00002608, title = {{T}rophic ecology of marine birds and pelagic fishes from {R}eunion {I}sland as determined by stable isotope analysis}, author = {{K}ojadinovic, {J}. and {M}{\'e}nard, {F}r{\'e}d{\'e}ric and {B}ustamante, {P}. and {C}osscon, {R}. {P}. and {L}e {C}orre, {M}.}, editor = {}, language = {{ENG}}, abstract = {{S}table nitrogen and carbon isotopes were used to investigate trophic ecology in tropical marine bird and fish communities from {R}eunion {I}sland, western {I}ndian {O}cean. {F}irstly, isotope signatures in the liver of {B}arau's petrels {P}terodroma baraui, {A}udubon's shearwaters {P}uffinus lherminieri bailloni, and white-tailed tropicbirds {P}haethon lepturus were used to compare their trophic levels and determine whether they forage in the same areas while breeding on {R}eunion {I}sland. {S}patial and trophic segregations were noted among these seabirds. {B}arau's petrels seem to feed on prey of higher trophic levels than {A}udubon's shearwaters. {D}ifferent isotopic signatures in adults and juveniles of these species suggest that these chick-rearing {P}rocellarifformes adopt a dual food-provisioning strategy, making separate foraging trips to feed their fledglings and for their own maintenance. {S}atellite tracking should be undertaken to verify this hypothesis. {F}urthermore, novel data were obtained on the seabirds' interbreeding period by analyzing feather signatures. {W}hite-tailed tropicbirds are thought to change foraging areas during this season, although none of the birds seemed to shift diets. {S}econdly, isotopic signatures in the muscle of yellowfin tuna {T}hunnus albacares, skipjack tuna {K}atsuwonus pelamis, and common dolphinfish {C}oryphaena hippurus were used to gather information on their feeding behaviors in {R}eunion {I}sland waters. {S}patial and trophic segregations were also observed, particularly between common dolphinfish and the tuna species, where the former fed more on low trophic level coastal organisms under fish aggregating devices than did the latter. {F}inally, trophic interactions in bird and fish communities were investigated. {S}eabirds appear to be trophically more structured than fish, foraging in a wider range of areas. {O}ur results confirmed feeding associations between {A}udubon's shearwaters and yellowfin tuna.}, keywords = {{F}eeding behavior ; {S}eabirds ; {T}unas ; {D}olphinfish ; {T}op predators ; {W}estern indian ; {O}cean ; {D}elta n-15 ; {D}elta c-13}, booktitle = {}, journal = {{M}arine {E}cology {P}rogress {S}eries}, volume = {361}, numero = {}, pages = {239--251}, ISSN = {0171-8630}, year = {2008}, DOI = {10.3354/meps07355}, URL = {https://www.documentation.ird.fr/hor/{PAR}00002608}, }