Abstract

ASTUDILLO, Graciela V; ACOSTA, Juan C; VILLAVICENCIO, Héctor J  and  CORDOBA, Mariela A. Ecología trófica y dimorfismo sexual del lagarto endémico Liolaemus eleodori (Iguania: Liolaemidae) del Parque Nacional San Guillermo, San Juan, Argentina. Cuad. herpetol. [online]. 2015, vol.29, n.1, pp.27-39. ISSN 1852-5768.

A study of the diet composition and its seasonal (December 2004 and February 2005) and inter­sexual variation was performed in Liolaemus eleodori. Moreover, trophic niche breadth, trophic diversity and predator-prey ratio was determined; this latter measure was made between the length, width and maximum volume of prey and morphology (LHC and head measures) from predators. Also information on sexual dimorphism was supplied. For trophic analysis digestive tracts were used. Each prey item found was reconstructed for its identification and its volume, numerosity, and frequency of occurrence were estimated. It was used the Relative Importance Index (RII) to estimate the contribution of each food category to the diet. To examine sexual dimorphism, 14 morphological variables were measured. Liolaemus eleodori showed a tendency to the omnivore feed, consume arthropods: insects, spiders, mites and centipedes; being also frequent the presence of vegetal material. Males were significantly larger than females in length, width and maximum height of head, femur length, tail length and exhibited a greater number of precloacal pores.

Keywords : Liolaemus; Diet; Sexual Dimorphism; Liolaemus.

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