Temperature resistance of Hesiolyra bergi, a polychaetous annelid living on deep-sea vent smoker walls
|Author(s)||Shillito Bruce, Jollivet Didier, Sarradin Pierre-Marie, Rodier Philippe, Lallier François, Desbruyeres Daniel, Gaill Françoise|
|Affiliation(s)||Univ Paris UPMC, Marine Biol Grp, CNRS,LBMCD, UMR 7622, F-75252 Paris 5, France.
CNRS, UPR 9042, Roscoff Marine Stn, Ecophysiol Grp, F-29682 Roscoff, France.
IFREMER, Ctr Brest, DRO EP, F-29280 Plouzane, France.
|Source||Marine Ecology Progress Series (0171-8630) (Inter-Research), 2001-07 , Vol. 216 , P. 141-149|
|WOS© Times Cited||64|
|Keyword(s)||IPOCAMP, Adaptation to heat, Behaviour, Hydrothermal vents|
|Abstract||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.|