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Marine Biology

, Volume 137, Issue 3, pp 447–451 | Cite as

The nature of heat coma in Littorina littorea (Mollusca: Gastropoda)

  • A. P. Clarke
  • P. J. Mill
  • J. Grahame

Abstract

 The nature of heat coma was examined in the edible periwinkle Littorina littorea (L.). Duration of acclimation did not influence heat-coma temperature at 12 °C, although other acclimation temperatures were important in influencing thermal tolerance, with positive shifts in coma temperature observed in response to elevated temperatures. Previous thermal history also influenced heat-coma temperatures. Individuals subjected to repeat heat-coma events on a daily basis showed significant declines (P < 0.05) in coma-temperature; in contrast individuals exposed to repeat heat-coma events on a weekly basis showed no decline in thermal tolerance. Size-effects occurred at selected sites, where decreased heat-coma temperatures were recorded in large individuals.

Keywords

Elevated Temperature Daily Basis Mollusca Significant Decline Thermal History 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • A. P. Clarke
    • 1
  • P. J. Mill
    • 1
  • J. Grahame
    • 1
  1. 1.School of Biology, University of Leeds, Leeds LS2 9JT, Yorkshire, England Fax: 0044 (0)113 216 2401 e-mail: aclarke@mail.parklanecoll.ac.ukGB

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