%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Whitney, N. M.
%A Taquet, Marc
%A Brill, R. W.
%A Girard, C.
%A Schwieterman, G. D.
%A Dagorn, Laurent
%A Holland, K. N.
%T Swimming depth of dolphinfish (Coryphaena hippurus) associated and unassociated with fish aggregating devices
%D 2016
%L fdi:010068780
%G ENG
%J Fishery Bulletin
%@ 0090-0656
%K PACIFIQUE ; OCEAN INDIEN ; HAWAII ; REUNION ; SEYCHELLES
%M ISI:000390143700005
%N 4
%P 426-434
%R 10.7755/fb.114.4.5
%U https://www.documentation.ird.fr/hor/fdi:010068780
%> https://www.documentation.ird.fr/intranet/publi/2017/01/010068780.pdf
%V 114
%W Horizon (IRD)
%X Dolphinfish (Coryphaena hippurus), large pelagic predators and important fishery targets, frequently associate with floating debris or manmade fish aggregating devices (FADs). We tagged 8 dolphinfish with pressure-sensitive ultrasonic transmitters and actively tracked individuals continuously for up to 40 h to elucidate the vertical movement patterns and differences between FADassociated (FAD-A) and FAD-unassociated (FAD-U) fish. Four additional fish were equipped with acoustic transmitters and passively monitored for several days with receivers attached to FADs. When not associated with FADs, dolphinfish used the upper 75-100 m of the water column during the day and made descents up to 160 m during the night. In contrast, FAD-A fish generally stayed within the upper 10 m of the water column and tended to make deeper excursions during the day rather than at night. Water temperature data from expendable bathythermo-graphs deployed during active tracking showed that fish only descended to depths where temperatures were <= 3 degrees C cooler than the uniform-temperature surface layer. The use of vertical behavior to determine whether a dolphinfish is associated or not with a floating object opens the possibility for new, large-scale research aimed at investigating the role of floating objects in the ecosystem inhabited by this species and at assessing the impacts of FADs on its ecology.
%$ 040 ; 036