Low genetic variation in a critically endangered mediterranean lizard: Conservation concerns for podarcis raffonei (reptilia, lacertidae)

Abstract

The conservation status of Podarcis raffonei, native to the Aeolian Islands (north cast of Sicily, Tyrrhenian Sea), is assessed by studying its genetic structure and evidencing factors affecting the survival of the species. Genetic variation in the species is quite low and genetic subdivision is high, as compared to other lacertid lizards and to vertebrates in general. Very little gene flow was detected, implying little or no contact between populations. The four remaining populations of P. raffonei are under severe threat from the effects of habitat alteration, interspecific competition, collecting and trade, very low population density and inbreeding, population fragmentation, and apparent loss of genetic variation. Possible management and conservation measures are suggested. © 2004 Taylor & Francis Group, LLC.