The structure of the thermal landscape determined behavioral and physiological responses to simulated predation risk_data

Although predators can deter an animal from regulating its body
temperature by basking or shuttling, this response to predation should
depend on the spatial distribution of thermal resources.
By simulating predation risk, we showed that movement,
thermoregulation, and corticosterone of male lizards (Sceloporus jarrovi)
depended on the spatial distribution of shade. Simulated risk caused
lizards to move less, thermoregulate worse, and circulate more
corticosterone than they did without risk. However, a patchier
distribution of shade enabled lizards to move more, thermoregulate better,
and circulate less corticosterone when exposed to a simulated predator. In
the absence of simulated risk, lizards in patchier environments moved
less, thermoregulated better, and circulated less corticosterone,
indicating the distribution of shade also affected the energetic cost of
thermoregulation. This study provides the first test of a spatial theory
of thermoregulation under the perceived risk of predation.