Процена конзервационог статуса зелених жаба (Rana synklepton esculenta complex) у Србији – Основне поставке (The conservation status evaluation for green frogs (Rana synklepton esculenta complex) in Serbia - basic assumption)

Abstract

The conservation status is the indicator of continuing species survival. The global and especially local problems of amphibian populations declining have significant public concern, partly because amphibians could to be indicator species of global environmental health. According to previous results, three forms of green frogs are inhabit in Serbia (Rana (Pelophylax) ridibunda Pallas, 1771, Rana (Pelophylax) lessonae Camerano, 1882 and their hybridogenetic hybrid Rana (Pelophylax) kl. esculenta Linnaeus, 1758). There are no relevant data about the general populations declining of Amphibians (thus Rana synklepton esculenta complex also) in Serbia. First steps in spatial and temporal analysis in composition fluctuations of green frogs populations indicate presence of some negative factors as a cause. The major factors are: Destruction, alteration and fragmentation, over-exploitation of habitat, organic and inorganic contaminations, as well as transportation infrastructure expansion including amphibians deaths on roads. The underlying mechanisms behind these factors are complex and they may be working synergistically with several major factors.Variation in age structure and populations system structure is to discern.