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First published online June 15, 2006
Journal of Experimental Biology 209, 2409-2419 (2006)
Published by The Company of Biologists 2006
doi: 10.1242/jeb.02257
Hot limpets: predicting body temperature in a conductance-mediated thermal system
1 Hopkins Marine Station of Stanford University, Pacific Grove, CA 93950,
USA
2 Department of Zoology, University of British Columbia, Vancouver, BC, V6T
1Z4, Canada
* Author for correspondence (e-mail: mwdenny{at}stanford.edu)
Accepted 6 April 2006
Living at the interface between the marine and terrestrial environments, intertidal organisms may serve as a bellwether for environmental change and a test of our ability to predict its biological consequences. However, current models do not allow us to predict the body temperature of intertidal organisms whose heat budgets are strongly affected by conduction to and from the substratum. Here, we propose a simple heat-budget model of one such animal, the limpet Lottia gigantea, and test the model against measurements made in the field. Working solely from easily measured physical and meteorological inputs, the model predicts the daily maximal body temperatures of live limpets within a fraction of a degree, suggesting that it may be a useful tool for exploring the thermal biology of limpets and for predicting effects of climate change. The model can easily be adapted to predict the temperatures of chitons, acorn barnacles, keyhole limpets, and encrusting animals and plants.
Key words: heat-budget model, intertidal zone, thermal limits, limpet, Lottia gigantean, heat stress
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