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Ecology of Xenosaurus grandis agrenon, a Knob-Scaled Lizard from Oaxaca, México

Julio A. Lemos-Espinal, Geoffrey R. Smith and Royce E. Ballinger
Journal of Herpetology
Vol. 37, No. 1 (Mar., 2003), pp. 192-196
Stable URL: http://www.jstor.org/stable/1565851
Page Count: 5
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Ecology of Xenosaurus grandis agrenon, a Knob-Scaled Lizard from Oaxaca, México
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Abstract

We studied the ecology of a population of the mountain knob-scaled lizard, Xenosaurus grandis agrenon, from Oaxaca, México. Males and females did not differ in body size (SVL), but males did have larger heads and hind limbs than females. Mean litter size was 3.2. Sex ratio did not differ from 1:1. All lizards were found associated with crevices. The size of the crevice (thickness and depth) increased with lizard SVL. Mean body temperature was 25.6°C. Body temperature was related to air and substrate temperature. Body temperature was influenced by the amount of cover, and the lizard's body position in its crevice but not by sex, month, vegetation type, or any crevice characteristics. We compare the ecology of this population to that of other Xenosaurus. /// Estudiamos la ecología de una población de la lagartija cantil de montaña, Xenosaurus grandis agrenon, en Oaxaca, México. Machos y hembras no difirieron en tamaño corporal (LHC), pero los machos tuvieron cabezas y fémures más grandes que las hembras. El promedio del tamaño de camada fue de 3.2. La proporción de sexos no fue diferente de 1:1. Todas las lagartijas fueron encontradas asociadas a grietas de roca. El tamaño de las grietas (grosor y profundidad) incremento junto con la LHC de la lagartija. La temperatura corporal promedio fue 25.6°C. La temperatura corporal estuvo relacionada a la temperatura del aire y del sustrato. La temperatura corporal estuvo influenciada por la cantidad de cobertura vegetal, y por la posición del cuerpo de la lagartija en la grieta, pero no por el sexo, mes, tipo de vegetación, o cualquier otra característica de la grieta. Comparamos la ecología de esta población con la de otras lagartijas del género Xenosaurus.

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