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Preferred temperature (Tpref) in ectotherms is crucial for behavioral thermoregulation. This study reviews methods for measuring Tpref in intertidal species, highlighting the need for standardization to understand thermal adaptation in variable environments.

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Area of Science:

  • Ecology
  • Animal Behavior
  • Physiology

Background:

  • Preferred temperature (Tpref) is a key metric for behavioral thermoregulation in ectotherms.
  • Tpref is typically lower than optimal temperature (Topt) due to performance curve asymmetry, with mismatch increasing with body temperature (Tb) variability.
  • Intertidal ectotherms face extreme daily Tb fluctuations, making them ideal for studying Tpref-Tb variability relationships.

Purpose of the Study:

  • To review and standardize methodologies for measuring Tpref in intertidal ectotherms.
  • To assess the relationship between Tpref and Tb variability in extreme environments.
  • To provide insights into behavioral thermoregulation in thermally variable habitats.

Main Methods:

  • Literature review of studies measuring Tpref and Topt in intertidal ectotherms.
  • Analysis of factors influencing behavioral thermoregulation in intertidal species (e.g., body size, mobility, acclimation history).
  • Evaluation of existing methodologies for measuring Tpref in intertidal ectotherms.

Main Results:

  • A positive relationship was found between acclimation temperature and Tpref in intertidal ectotherms.
  • Significant variation exists in methodologies used to assess Tpref, confounding interspecific comparisons.
  • Several factors (e.g., body size, thermal sensitivity, acclimation) influence Tpref measurements.

Conclusions:

  • Standardized methodologies are crucial for accurate Tpref assessment in intertidal ectotherms.
  • Intertidal environments offer unique opportunities to test theoretical predictions of Tpref-Tb variability relationships.
  • Understanding behavioral thermoregulation is vital for predicting species' responses to future climate change and increasing thermal variability.