Régime Alimentaire d'une Population de Lézard des Murailles, Podarcis muralis (Laurent, 1768) dans le Sud-Ouest de la France

in Amphibia-Reptilia
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Abstract

Diet and its variations as a function of time and of lizard size were studied in a natural population of Podarcis muralis in the south-west of France during 1980 and 1981. The taxonomic diversity of the ingested food items, the wide range of prey size, the absence of a close relationship between prey and predator size, and the seasonal and interannual variation of the composition of the diet emphasize the alimentary opportunism of this lizard species. Such opportunism is supposed to be related to the ecological conditions of the studied population, which include high population density, low prey productivity within the biotope, unpredictable variability of prey abundance, and low interspecific competitive pressure.

Régime Alimentaire d'une Population de Lézard des Murailles, Podarcis muralis (Laurent, 1768) dans le Sud-Ouest de la France

in Amphibia-Reptilia

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