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Thermal ecology studies of ectothermic organisms provide important information for studying ecological physiology, evolution, behavior, and more recently, to assess how climate change may affect them. Ectotherms have received wide attention, but field studies on amphibians are lacking. Consequently, we present data on thermoregulation of 11 species of amphibians from Nayarit, western Mexico. The results are discussed with thermally similar strategies. Our results fill some existing knowledge gaps of amphibian thermal ecology and provide the framework for future research on the eco-physiology of ectotherms.

ResumenSe presenta información sobre presas consumidas por la culebra de agua Thamnophis hammondii en un arroyo de montaña en Baja California Sur, México. Esta culebra incluye en su dieta a la rana arborícola de Baja California Pseudacris hypochondriaca curta (especie nativa), pero también a un pez exótico: la tilapia de vientre rojo Tilapia sp. cf. zilli. Este pez introducido en los oasis de Baja California Sur ha desplazado a las especies de peces nativos, y a la vez se ha convertido en un recurso alimentario importante para T. hammondii.AbstractInformation is presented about the prey consumed by the two-stripped garter snake Thamnophis hammondii in a mountain oasis in Baja California Sur, Mexico. The diet of this threatened snake includes the Baja California treefrog Pseudacris hypochondriaca curta (native species), as well as an exotic fish: the red bellied tilapia Tilapia sp. cf. zilli. This exotic species has become invasive in Baja California Sur oases, displacing native fishes and becoming an important dietary resource to T. hammondii.