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Thermal Preference And Performance In A Sub-Antarctic Caterpillar: A Test Of The Coadaptation Hypothesis And Its Alternatives., Tanya M Haupt, Brent J Sinclair, Steven L Chown
Thermal Preference And Performance In A Sub-Antarctic Caterpillar: A Test Of The Coadaptation Hypothesis And Its Alternatives., Tanya M Haupt, Brent J Sinclair, Steven L Chown
Biology Publications
Physiological ecologists have long assumed that thermoregulatory behaviour will evolve to optimise physiological performance. The coadaptation hypothesis predicts that an animal's preferred body temperature will correspond to the temperature at which its performance is optimal. Here we use a strong inference approach to examine the relationship between thermal preference and locomotor performance in the caterpillars of a wingless sub-Antarctic moth, Pringleophaga marioni Viette (Tineidae). The coadaptation hypothesis and its alternatives (suboptimal is optimal, thermodynamic effect, trait variation) are tested. Compared to the optimal movement temperature (22.5°C for field-fresh caterpillars and 25, 20, 22.5, 25 and 20°C following seven day acclimations …