FN Archimer Export Format PT J TI Effects of lunar cycle and fishing operations on longline-caught pelagic fish: fishing performance, capture time, and survival of fish BT AF POISSON, Francois GAERTNER, Jean-Claude TAQUET, Marc DURBEC, Jean-Pierre BIGELOW, Keith AS 1:1;2:2;3:3;4:2;5:4; FF 1:PDG-DOP-DCM-HMT-RHSETE;2:;3:PDG-DOP-DCOP;4:;5:; C1 IFREMER, Ctr Rech Halieut Mediterraneen & Trop, F-34203 Sete, France. Ctr Oceanol Marseille, LMGEM, UMR CNRS 6117, Marine Endoume Stn, F-13007 Marseille, France. Ctr IFREMER Pacifique, Taravao 98719, Fr Polynesia. NOAA, Pacific Isl Fisheries Sci Ctr, Honolulu, HI 96822 USA. C2 IFREMER, FRANCE UNIV AIX MARSEILLE, FRANCE IFREMER, FRANCE NOAA, USA SI SETE TAHITI SE PDG-DOP-DCM-HMT-RHSETE PDG-DOP-DCOP IN WOS Ifremer jusqu'en 2018 copubli-france copubli-int-hors-europe IF 0.779 TC 44 UR https://archimer.ifremer.fr/doc/00011/12237/9019.pdf LA English DT Article AB Commercial longline fishing data were analyzed and experiments were conducted with gear equipped with hook timers and time-depth recorders in the Reunion Island fishery (21 degrees 5'S lat., 53 degrees 28'E long.) to elucidate direct and indirect effects of the lunar cycle and other operational factors that affect catch rates, catch composition, fish behavior, capture time, and fish survival. Logbook data from 1998 through 2000, comprising 2009 sets, indicated that swordfish (Xiphias gladius) catch-per unit of effort (CPUE) increased during the first and last quarter of the lunar phase, whereas albacore (Thunnus alalunga) CPUE was highest during the full moon. Swordfish were caught rapidly after the longline was set and, like bigeye tuna (Thunnus obesus), they were caught during days characterized by a weak lunar illumination-mainly during low tide. We found a significant but very low influence of chemical lightsticks on CPUE and catch composition. At the time the longline was retrieved, six of the 11 species in the study had >40% survival. Hook timers indicated that only 8.4% of the swordfish were alive after 8 hours of capture, and two shark species (blue shark [Prionace glauca] and oceanic whitetip shark [Carcharhinus longimanus]) showed a greater resilience to capture: 29.3% and 23.5% were alive after 8 hours, respectively. Our results have implications for current fishing practices and we comment on the possibilities of modifying fishing strategies in order to reduce operational costs, bycatch, loss of target fish at sea, and detrimental impacts on the environment. PY 2010 PD JUN SO Fishery Bulletin SN 0090-0656 PU Natl Marine Fisheries Service Scientific Publ Office VL 108 IS 3 UT 000279857500002 BP 268 EP 281 ID 12237 ER EF