Dagorn Laurent auteur aut IRD Josse Erwan auteur aut IRD Bach Pascal auteur aut IRD text journalArticle eng text/pdf reformatted digital access Three yellowfin tuna (Thunnus albacares) carrying ultrasonic depth-sensitive transmitters developed a strong association with the tracking vessel, following it at speeds up to 5 knots (2.6 m/s). Two fish associated with the tracking vessel during daytime, and the other fish during day and night periods. Swimming behavior appeared to depend on the speed of the vessel. The tuna remained within a few meters of the surface when the vessel was traveling at high speeds but moved deeper when the vessel drifted. The behavior of these fish is compared to those of other yellowfin tuna tracked in other situations (associated with devices). The reasons for these associations are not known but some hypotheses are advanced. (Résumé d'auteur) specialized POISSON THON TELEDETECTION RADIOMETRIE COMPORTEMENT DISPOSITIF DE CONCENTRATION DES POISSONS COMPETITION TELEMETRIE RADIOTRACKING POLYNESIE FRANCAISE 040PECHE 99 40-48 2001 0090-0656 https://www.documentation.ird.fr/hor/fdi:010025230 0090-0656 [F B010025230] https://www.documentation.ird.fr/hor/fdi:010025230 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_7/b_fdi_57-58/010025230.pdf IRD - Base Horizon / Pleins textes 2001-05-31 2021-05-20 fdi:010025230 fre