Fig. 3. The effect of dehydration on EWL by Gila monsters at thermally challenging temperatures. Each symbol indicates the mean value for six Gila monsters; error bars indicate ± 1 S.E.M. (A) Effect on cutaneous, ventilatory and cloacal EWL at 37.5°C and 40°C. An asterisk indicates a statistically significant (P<0.025) difference between values from hydrated and dehydrated animals. (B) Cloacal EWL of hydrated animals and dehydrated animals. Note the lack of elevated cloacal EWL at 37.5°C and attenuation of cloacal EWL at 40°C for dehydrated animals (i.e. a right shift in the EWL–temperature response curve).