FN Archimer Export Format PT J TI Deep diving behavior observed in yellowfin tuna (Thunnus albacares) BT AF DAGORN, Laurent HOLLAND, Kim N. HALLIER, Jean-Pierre TAQUET, Marc MORENO, Gala SANCHO, Gorka ITANO, David AUMEERUDDY, Ryaz GIRARD, Charlotte MILLION, Julien FONTENEAU, Alain AS 1:1;2:2;3:3;4:4;5:5;6:6;7:7;8:8;9:1;10:2;11:9; FF 1:;2:;3:;4:PDG-DOP-DCM-HMT-RHREUNION;5:;6:;7:;8:;9:;10:;11:; C1 IRD, Victoria, Seychelles. Univ Hawaii, Hawaii Inst Marine Biol, Kaneohe, HI 96744 USA. IOTC, Reg Tuna Tagging Project Indian Ocean RTTP IO, Victoria, Seychelles. IFREMER, Le Port 97822, Reunion. AZTI Tecnalia, Unidad Invest Marina, Sukarrieta 48395, Spain. Coll Charleston, Grice Marine Lab, Charleston, SC 29412 USA. Univ Hawaii, Pelag Fisheries Res Program, Honolulu, HI 96822 USA. Seychelles Fishing Author, Victoria, Seychelles. IRD, CRHMT, F-34203 Sete, France. C2 IRD, SEYCHELLES UNIV HAWAII, USA IOTC, SEYCHELLES IFREMER, FRANCE AZTI, SPAIN COLL CHARLESTON, USA UNIV HAWAII, USA SEYCHELLES FISHING AUTHOR, SEYCHELLES IRD, FRANCE SI LA REUNION SE PDG-DOP-DCM-HMT-RHREUNION IN WOS Ifremer jusqu'en 2018 copubli-france copubli-p187 copubli-europe copubli-int-hors-europe copubli-sud IF 1.247 TC 44 UR https://archimer.ifremer.fr/doc/2006/publication-1402.pdf LA English DT Article DE ;Indian ocean;Yellowfin tuna;Swimming speed;Diving behavior;Vertical movements;Archival tap AB Yellowfin tuna (Thunnus albacares) are known to preferentially occupy the Surface mixed layer above the thermocline and it has been Suggested that they are physiologically restricted to water lerriperatt.11-CS no more than 8 degrees C colder than Surface waters. However, we here report for dive data acquired from a large yellowfin tuna which demonstrate for the first time that this species is indeed capable of making prolonged dives into deep cold waters. A yellowfin tuna (134 cm fork length) caught near ail anchored fish aggregating device (FAD) in the Seychelles (Western Indian Ocean) was equipped with all internally implanted archival tag and released. The fish was recaptured 98 days later. As predicted for this species, this fish spent 85% of its time shallower than 75 in (maximum thermocline depth experienced by the fish) but, over the Course of the track, it performed three deep dives to 578 in, 982 In and 1160 In. Minimum ambient water temperatures recorded Lit these depths were 8.6 degrees C, 7.4 degrees C and 5.9 degrees C respectively and varied by up to 23.3 degrees C from surface temperatures. The fish spent 8.3% of its time in waters more than 8 degrees C colder than the surface layer and daily experienced a wide range of sea temperatures (mode at 15- 16 degrees C) and of temperatures of the gut cavity (mode at 6 degrees C). The reason for these dives call not be known. These depths and temperatures significantly exceed those reported ill the literature so far and clearly demonstrate that this species has the physiological and behavioral ability to penetrate deep cold sections of the ocean. PY 2006 SO Aquatic Living Resources SN 0990-7440 PU EDP Sciences VL 19 IS 1 UT 000236612100008 BP 85 EP 88 DI 10.1051/alr:2006008 ID 1402 ER EF