Tolotti M. T. auteur aut IRD Forget Fabien auteur aut IRD Capello Manuela auteur aut IRD Filmalter J. D. auteur aut IRD Hutchinson M. auteur aut IRD Itano D. auteur aut IRD Holland K. auteur aut IRD Dagorn Laurent auteur aut IRD text journalArticle eng text/pdf born digital access Several pelagic fish species are known to regularly associate with floating objects in the open ocean, including commercially valuable species. The tuna purse seine industry takes advantage of this associative behavior and has been increasingly deploying free-drifting man-made floating objects, also known as fish aggregating devices (FADs). Using passive acoustic telemetry, this study describes the associative dynamics of the main targeted tropical tuna species (Thunnus albacores, T. obelus and Katsuwonus pelamis), as well as three major bycatch species, silky shark (Carcharhinus falciformis), rainbow runner (Elagatis bipinmdata) and oceanic triggerfish (Canthidermis maculata). Short-term excursions away from the FADs were frequently performed by all tuna species as well by silky sharks. These excursions were characterized by a marked diel pattern, mainly occurring during nighttime. Rainbow runners and oceanic triggerfish were much more present at the FADs and rarely performed excursions. Average continuous residence times (CRTs) ranged from 6 days, for silky shark, up to 25 days for bigeye tuna. Similar to silky shark, average CRTs for skipjack tuna and oceanic triggerfish were less than 10 days. For yellowfin tuna and rainbow runner, CRTs averaged 19 and 16 days, respectively. Bigeye and yellowfin tuna remained associated to a single drifting FAD for a record of 55 days and 607 km traveled. specialized Behavior Acoustic telemetry Residence time Floating objects Pelagic fish Tropical tuna ATLANTIQUE ZONE TROPICALE 040 034 226 art. 105521 [12 p.] 2020 0165-7836 https://www.documentation.ird.fr/hor/fdi:010078943 10.1016/j.fishres.2020.105521 0165-7836 [F B010078943] https://www.documentation.ird.fr/hor/fdi:010078943 https://www.documentation.ird.fr/intranet/publi/2020/04/010078943.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2020-05-19 2025-02-24 fdi:010078943 fre