SciELO - Scientific Electronic Library Online

 
vol.78 número1Riqueza y diversidad de especies leñosas del bosque tropical caducifolio El Tarimo, Cuenca del Balsas, GuerreroAvifauna del bosque mesófilo de montaña del noreste de Hidalgo, México índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Revista mexicana de biodiversidad

versión impresa ISSN 1870-3453

Resumen

GARCIA-DE LA PENA, Cristina; GADSDEN, Héctor; CONTRERAS-BALDERAS, Armando J.  y  CASTANEDA, Gamaliel. Daily and seasonal activity patterns of a lizard guild in the sand dunes of Viesca, Coahuila, Mexico. Rev. Mex. Biodiv. [online]. 2007, vol.78, n.1, pp. 141-147. ISSN 1870-3453.

In 2002, daily and seasonal activity patterns of the lizards Uta stejnegeri, Uma exsul, and Aspidoscelis marmorata were evaluated in a dune habitat in the southwestern portion of Coahuila, Mexico. Methods included surveying a 500 m transect once per hour between 0700 and 1900 for 7 days each season during the spring, summer and fall. The number of active lizards, air and substrate temperatures, and relative humidity were recorded. A standardized Levins Index and Pianka’s method were used to measure temporal niche breadth and overlap, respectively. In each of the 3 seasons, U. stejnegeri was active earlier than U. exsul, and U. exsul was active before A. marmorata. The 3 species showed a bimodal activity pattern during spring and summer, and unimodal in fall. Aspidoscelis marmorata showed the smallest niche breadth in the 3 seasons. For each species, preferred body temperature and environmental temperature seem to dictate activity patterns of this lizard guild at Viesca.

Palabras llave : Uta stejnegeri; Uma exsul; Aspidoscelis marmorata; temporal niche.

        · resumen en Español     · texto en Español     · pdf en Español