Bergmann’s Rule rules body size in an ectotherm: heat conservation in a lizard along a 2200-meter elevational gradient

Francisco J. Zamora-Camacho, Senda Reguera and Gregorio Moreno-Rueda. Journal of Evolutionary Biology. Accepted manuscript online: 11 NOV 2014. Bergmann’s Rule predicts larger body sizes in colder habitats, increasing organisms’ ability to conserve heat. Originally formulated for endotherms, it is controversial whether Bergmann’s Rule may be applicable to ectotherms, given that larger ectotherms show diminished capacity for heating up. We predict that Bergmann’s Rule will be applicable to ectotherms when the benefits of a higher conservation of heat due to a larger body size overcompensate for decreased capacity to heating up. Leer más.