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Heat-shock response and temperature resistance in the deep-sea vent shrimp Rimicaris exoculata.

TitreHeat-shock response and temperature resistance in the deep-sea vent shrimp Rimicaris exoculata.
Type de publicationJournal Article
Year of Publication2003
AuteursRavaux, J, Gaill, F, Le Bris, N, Sarradin, P-M, Jollivet, D, Shillito, B
JournalJ Exp Biol
Volume206
TicketPt 14
Pagination2345-54
Date Published2003 Jul
ISSN0022-0949
Mots-clésAnimals, Behavior, Animal, Blotting, Western, Body Temperature Regulation, Decapoda (Crustacea), Environment, Heat-Shock Response, HSP70 Heat-Shock Proteins, Marine Biology, Oceans and Seas, Temperature, Video Recording
Résumé

The shrimp Rimicaris exoculata swarms around hydrothermal black smoker chimneys at most vent sites along the Mid-Atlantic Ridge. This species maintains close proximity to the hydrothermal fluid, where temperatures can reach 350 degrees C and steep thermal and chemical gradients are expected. We performed in vivo experiments in pressurized aquaria to determine the upper thermal limit [critical thermal maximum (CT(max))] of R. exoculata and to investigate some characteristics of the shrimp stress response to heat exposure. These experiments showed that the shrimp does not tolerate sustained exposure to temperatures in the 33-37 degrees C range (CT(max)). A heat-inducible stress protein belonging to the hsp70 family was identified in R. exoculata, and its synthesis threshold induction temperature is below 25 degrees C. The R. exoculata optimal thermal habitat may thus be restricted to values lower than previously expected (<25 degrees C).

Alternate JournalJ. Exp. Biol.
Identifiant (ID) PubMed12796451