@article{fdi:010055858, title = {{E}vidence that whales ({B}alaenoptera borealis) visit drifting fish aggregating devices : do their presence affect the processes underlying fish aggregation ?}, author = {{B}rehmer, {P}atrice and {J}osse, {E}rwan and {N}ottestad, {L}.}, editor = {}, language = {{ENG}}, abstract = {{E}vidence of the presence of a group of sei whales ({B}alaenoptera borealis) detected around drifting fish aggregating devices ({FAD}s) was provided by omnidirectional multi-beam sonar during a survey off the {S}eychelles ({I}ndian {O}cean). {T}he short visit by the sei whales produced a significant change in the behaviour of the fish assemblage associated with the {FAD}. {T}here was first a significant increase in fish density when the whales approached the {FAD}, then a marked decrease after the whales had moved away from the {FAD}. {F}urthermore, the fish density was still low, 3 h after the whales had left the {FAD}. {W}e assume that the presence and behaviour of the sei whales led some of the fish initially associated with the {FAD} to move away from it. {T}here has been a considerable increase in the use of drifting artificial {FAD}s in the {I}ndian {O}cean in recent decades. {T}he frequency of cetacean visits to drifting {FAD}s in the {I}ndian {O}cean is unknown, but they may have a major impact on assemblages of pelagic fish species around {FAD}s. {T}he effect of marine mammals on {FAD}-associated fish could be relevant to the ecological trap theory ({FAD} acting as a trap for their associated fish) because of their impact on the dynamics of fish aggregation processes, through commensalism and/or predatorprey interactions.}, keywords = {{E}cological trap ; fish aggregation ; {I}ndian {O}cean ; omnidirectional sonar ; predator-prey interaction ; sei whales ; tropical fish}, booktitle = {}, journal = {{M}arine {E}cology. {A}n {E}volutionary {P}erspective}, volume = {33}, numero = {2}, pages = {176--182}, ISSN = {0173-9565}, year = {2012}, DOI = {10.1111/j.1439-0485.2011.00478.x}, URL = {https://www.documentation.ird.fr/hor/fdi:010055858}, }