TY - JOUR T1 - Temperature resistance of Hesiolyra bergi, a polychaetous annelid living on deep-sea vent smoker walls A1 - Shillito,Bruce A1 - Jollivet,Didier A1 - Sarradin,Pierre-Marie A1 - Rodier,Philippe A1 - Lallier,François A1 - Desbruyeres,Daniel A1 - Gaill,Françoise AD - Univ Paris UPMC, Marine Biol Grp, CNRS,LBMCD, UMR 7622, F-75252 Paris 5, France. AD - CNRS, UPR 9042, Roscoff Marine Stn, Ecophysiol Grp, F-29682 Roscoff, France. AD - IFREMER, Ctr Brest, DRO EP, F-29280 Plouzane, France. UR - https://archimer.ifremer.fr/doc/00000/811/ DO - 10.3354/meps216141 KW - IPOCAMP KW - Adaptation to heat KW - Behaviour KW - Hydrothermal vents N2 - For the first time, in vivo heat-exposure experiments were conducted on the hydrothermal vent polychaete Hesiolyra bergi from the hottest part of the vent biotope. Using a pressurised incubator equipped with video-facilities, we found that H. bergi, which forages around and in the tubes of the thermophilic Alvinella sp., became hyperactive once temperature exceeded 35 degreesC and further lost co-ordination in the 41 to 46 degreesC interval, just before death occurred. Another exposure experiment at 39 degreesC for 3 to 4 h led to 80 % mortality (max) 9 h after heat shock, and 100 % thereafter. In view of the much higher temperatures recorded in this organism's habitat, these results suggest that tolerance to high temperatures (exceeding 40 degreesC) is not a pre-requisite for life amongst alvinellid tubes. Behavioural responses (escape from heat) may suffice. Y1 - 2001/07 PB - Inter-Research JF - Marine Ecology Progress Series SN - 0171-8630 VL - 216 SP - 141 EP - 149 ID - 811 ER -