caa a22 4500 445893311 CHVBK 20180317145623.0 cr unu---uuuuu 170323e20111001xx s 000 0 eng 10.1007/s10750-011-0812-3 doi (NATIONALLICENCE)springer-10.1007/s10750-011-0812-3 Physiological consequences of the supralittoral fringe: microhabitat temperature profiles and stress protein levels in the tropical periwinkle Cenchritis muricatus (Linneaus, 1758) [Elektronische Daten] [Michael Judge, Mark Botton, Mary Hamilton] Habitat selection by marine snails is profoundly affected by variations in biotic and abiotic factors. In the supralittoral fringe of Caribbean rocky shores, the littorinid Cenchritis muricatus endures a near-terrestrial existence through a combination of active microhabitat choice and, during dry periods, repose. In this study, we sought to compare knobby periwinkle body size, thermal load, water loss, and stress protein expression among common supralittoral microhabitats to determine the physiological consequences of habitat selection. In this study, we show: (1) body temperatures in these snails exhibit daily fluctuations of more than 20°C and regularly exceed 46°C, (2) microhabitats differ in thermal stress over small spatial scales, with snails on black rocks and within crevices experiencing more extreme temperatures than snails on white rocks or grass, (3) water losses of 8.5% of total snail mass do not affect survival during 1week, and (4) Hsp70, but not Hsp90, expression varies slightly among microhabitats but at a level much lower than physiologically possible. During arousal following hydration, snails exhibited substantially higher levels of Hsp70s than snails on dry substrates in the field. When inactive, Cenchritis appears to utilize a distinctly different physiological state consistent with aestivation metabolism and does not exhibit significant up-regulation of inducible heat shock proteins (Hsps). In summary, studies lacking detailed thermal and hydration history, and relying only upon Hsp levels, may misrepresent the true physiological consequences of microhabitat choice for high-shore tropical gastropods. Springer Science+Business Media B.V., 2011 Desiccation nationallicence Stress protein nationallicence Littorinid nationallicence Microhabitat nationallicence Snail nationallicence Thermal load nationallicence Judge Michael Department of Biology, Manhattan College, 4513 Manhattan College Parkway, 10471, Riverdale, NY, USA aut Botton Mark Department of Natural Sciences, Fordham College at Lincoln Center, 113 West 60th Street, 10023, New York, NY, USA aut Hamilton Mary Department of Natural Sciences, Fordham College at Lincoln Center, 113 West 60th Street, 10023, New York, NY, USA aut Hydrobiologia Springer Netherlands 675/1(2011-10-01), 143-156 0018-8158 675:1<143 2011 675 10750 https://doi.org/10.1007/s10750-011-0812-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-011-0812-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Judge Michael Department of Biology, Manhattan College, 4513 Manhattan College Parkway, 10471, Riverdale, NY, USA aut NATIONALLICENCE 700 1- Botton Mark Department of Natural Sciences, Fordham College at Lincoln Center, 113 West 60th Street, 10023, New York, NY, USA aut NATIONALLICENCE 700 1- Hamilton Mary Department of Natural Sciences, Fordham College at Lincoln Center, 113 West 60th Street, 10023, New York, NY, USA aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 675/1(2011-10-01), 143-156 0018-8158 675:1<143 2011 675 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer