Comparative thermal ecology of the high-altitude lizard Sceloporus grammicus on the eastern slope of the Iztaccihuatl Volcano, Puebla, Mexico

摘要: We studied the thermal ecology of Sceloporus grammicus occurring in very different environments at 3700 and 4400 m elevation on Iztaccihuatl Volcano, Mexico. Despite differences environment between study sites, individual lizards maintained similar active body temperatures (around 31.5 °C). Similar two sites probably result cost thermoregulatory behavior. Lizards high-altitude site, an open area with few predators or competitors, presumably incur a lower than those low-altitude which has considerable number shaded spots more competitors. low-elevation site showed greater resistance to high high-elevation site. Physiological acclimatization higher environmental low is likely explain heat tolerance. Freezing tolerance, behavior, energy require...