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Biodiversity in Littorina species (Mollusca: Gastropoda): a physiological approach using heat-coma
Clarke, A.P.; Mill, P.J.; Grahame, J. (2000). Biodiversity in Littorina species (Mollusca: Gastropoda): a physiological approach using heat-coma. Mar. Biol. (Berl.) 137(3): 559-565. http://hdl.handle.net/10.1007/s002270000368
In: Marine Biology. Springer: Heidelberg; Berlin. ISSN 0025-3162, more
Peer reviewed article  

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Keyword
    Marine

Authors  Top 
  • Clarke, A.P.
  • Mill, P.J.
  • Grahame, J.

Abstract
    The upper critical thermal limits were measured as heat-coma temperatures in Littorina species as a tool for examining physiological diversity. Thermal tolerance was found to be stable within a population, but extensive variation occurred between populations and species. All species examined displayed heat-coma values of ~30?°C and did not show a positive correlation with shore height. Eulittoral-fringe species tended to have higher coma temperatures than eulittoral species. Coma temperatures varied both seasonally and geographically. Lethal thermal limits were also investigated; these were ~10?C° higher than coma temperatures.

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