Resumen

WOOLRICH-PINA, G. A. et al. Ecología térmica de una población de la lagartija Sceloporus grammicus (Iguanidae: Phrynosomatinae) que ocurre en la zona Centro-Oriente de la Ciudad de México. Acta Zool. Mex [online]. 2006, vol.22, n.2, pp.137-150. ISSN 2448-8445.

The thermal ecology of the lizard, Sceloporus grammicus in Mexico City was studied. Mean body temperature (T_b) was 31.43 ± 0.1 °C. Body temperature was significantly and positively related to air temperature (T_a: n = 147, r = 0.451, P < 0.001; T_b = 27.529 + 0.195 T_a) and substrate temperature (T_s: n = 147, r = 0.482, P < 0.001; T_b = 27.315 + 0.199 T_s) occupied by the lizards. The body temperature was different between males and females (ANCOVA with Ts as the covariate F_1,146 = 8.71, P = 0.003) and between pregnant females and unpregnant females as well (ANCOVA with T_s as the covariate F_1,91 = 18.81 P < 0.001). These results suggested that S. grammicus is a lizard with active thermoregulation and that reproductive status can influence the thermoregulatory strategy of females.

Palabras llave : Sceloporus grammicus; thermal ecology; thermoregulation; body temperature; reproductive status; Mexico City.