@article{fdi:010062695, title = {{F}rom colony to first patch : processes of prey searching and social information in {C}ape {G}annets}, author = {{T}hiebault, {A}. and {M}ullers, {R}. and {P}istorius, {P}. and {M}eza-{T}orres, {M}. {A}. and {D}ubroca, {L}aurent and {G}reen, {D}. and {T}remblay, {Y}ann}, editor = {}, language = {{ENG}}, abstract = {{S}eabirds forage in a highly dynamic environment and prey on fish schools that are patchily distributed. {C}olonially breeding seabirds regularly commute back and forth from their colony to foraging areas and need to acquire information on the location of food before and/or during each foraging trip. {T}he use of conspecifics as cues to locate prey has long been debated, and although the hypothesis was backed up by modeling studies, observations have been contradictory. {W}e deployed {GPS} devices coupled with micro video cameras on {C}ape {G}annets to observe the social context of foraging seabirds and the influence of conspecifics on the movement of individuals. {T}he {C}ape {G}annets reached their first patch using a succession of flights interrupted by stops on the water, during which the birds were mainly preening. {D}uring flight, the birds reacted to conspecifics by changing direction, either flying in the opposite direction of conspecifics that were flying toward the colony or following conspecifics outward. {T}he time to reach the first patch was significantly reduced (by half) when the birds reacted to conspecifics in these different ways, compared with the birds that did not react. {T}he use of conspecifics flying toward the colony to find food is consistent with the hypothesis that colonies can act as a focal place for information transfer, with foragers updating their flying direction when they detect conspecifics flying toward the colony. {T}he fine-scale reaction of seabirds toward each other at sea, and the associated improved foraging efficiency, as well as the division of trips into a succession of flights, constitute elements that indicate the existence and the use of a structured network among foraging {C}ape {G}annets.}, keywords = {biologging ; camera ; central place forager ; {GPS} ; information center ; network foraging ; seabirds ; tracking ; {AFRIQUE} {DU} {SUD}}, booktitle = {}, journal = {{A}uk}, volume = {131}, numero = {4}, pages = {595--609}, ISSN = {0004-8038}, year = {2014}, DOI = {10.1642/auk-13-209.1}, URL = {https://www.documentation.ird.fr/hor/fdi:010062695}, }