Abstract
Abstract During a field study in 1983-1984 in a 200 km 2 study area in the south of Evros province (Greece) the presence of 11 lizard species was established. For every species a distribution map within the area is supplied. In different parts of the area thc lizards formed different species combinations. Ophisops elegans appeared to vicariate in certain terrains with both Podarcis erhardii and P. taurica. By studying habitat selection and activity patterns of all species data on spatial and temporal niche segregation could be obtained. The activity patterns of all species were strongly influenced by exposition and altitude. In some species a strong altitude influence was also measured on growth and some other life history data. Some pairs of morphologically or ecologically related species are compared in more detail. Some species occurred in very high densities (Lacerta viridis up to 500, Ablepharus kitaibelii up to 1100 ind./ha). Tail loss frequencies of all species are given. For many birds of prey they formed an essential food source.
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