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vol.71 issue1REPTILES FROM ’’EL MORADO'' NATURAL MONUMENT (REGION METROPOLITANA, CHILE): RELATIVE ABUNDANCE, ALTITUDINAL DISTRIBUTION, AND PREFERENCE BY DIFFERENT SIZES OF ROCKSZOOPLANKTON OF THREE SHALLOW LAKES OF DIFFERENT SALINITY AND TROPHIC STATE IN THE SEMIARID PAMPEAN REGION (ARGENTINA) author indexsubject indexarticles search
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Gayana (Concepción)

Print version ISSN 0717-652XOn-line version ISSN 0717-6538

Abstract

VIDAL, Marcela A; ORTIZ, Juan Carlos  and  LABRA, Antonieta. SEXUAL AND GEOGRAPHIC VARIATION OF COLOR PATTERNS IN LIOLAEMUS TENUIS (SQUAMATA, LIOLAEMINAE). Gayana (Concepc.) [online]. 2007, vol.71, n.1, pp.27-33. ISSN 0717-652X.  http://dx.doi.org/10.4067/S0717-65382007000100004.

We studied sexual and geographic variation of color patterns in the lizard Liolaemus tenuis. We counted the number of scales with different colors in two body regions, in individuals of both sexes, from three groups of populations along a latitudinal range. Color patterns showed sexual and geographic variations; females and the northern group were the darkest. The selective pressures of these color pattern variations are unclear. However, considering that L. tenuis males are territorial and polygamous, we postulate that sexual variation in color would be consequence of sexual selection involving female choice and male-male interactions (e.g. agonistic displays among males). Geographic variation may be determined by predation pressure, as there is a tendency to a color matching with the predominant color of the environment (i.e. predominance of dark colors towards scrublands).

Keywords : Chromatophores; sexual dimorphism; lizard; Liolaemus; Chile.

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