Unifying indices of heat tolerance in ectotherms

Brandon S. Cooper, Benjamin H. Williams, Michael J. Angilletta

Research output: Contribution to journalArticle

26 Scopus citations

Abstract

1.Researchers commonly rely on indices of heat tolerance to infer the limits of performance in nature. Unfortunately, many methods are used to estimate heat tolerance, creating difficulties when synthesizing or comparing results among studies. Here, we relate several measures of heat tolerance based on the concept of a performance curve.2.To evaluate our ideas about the link between two measures of heat tolerance, we measured knockdown times and knockdown temperatures of terrestrial isopods (Porcellio scaber). We fit a linear model relating knockdown time to environmental temperature; this model was used to predict the knockdown temperature (i.e., the temperature at which the knockdown time equaled zero).3.Our model predicted a knockdown temperature within 0.1 °C of the observed value. This result reinforces the possibility of conceptually unifying several measures of thermal physiology.

Original languageEnglish (US)
Pages (from-to)320-323
Number of pages4
JournalJournal of Thermal Biology
Volume33
Issue number6
DOIs
StatePublished - Aug 1 2008
Externally publishedYes

Keywords

  • Critical thermal maximum
  • Heat tolerance
  • Knockdown temperature
  • Knockdown time
  • Temperature
  • Thermal performance curve

ASJC Scopus subject areas

  • Biochemistry
  • Physiology
  • Agricultural and Biological Sciences(all)
  • Developmental Biology

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