The introduction of alien fish species in wetland ecosystems could have a great impact on freshwater communities and ecological processes. Despite has been noticed as one the principal cause extinctions, ecosystem processes alteration, change aquatic community assemblage, very few data about reptiles are available. As study model we used two neighbour sub-populations endangered Sicilian pond tu...

To summarize evidence discussed elsewhere in this volume, past climate change can be detected on time scales of decades to hundreds of millions of years. Theories as to the causes for such changes extend back almost as far as the observations. James Croll (1867) was the first to seriously examine the role 164 CLIMATE CHANGE, CAUSES

-Western pond turtle (Clemmys marmorata) populations were examined on two forks of the Trinity River in northern California, one of which is subject to the impacts of damming and one of which is free-flowing. Mark-recapture was conducted over a three-year period for each population, and the JollySeber model was used to estimate population size. Size/age structures were compared with reference t...

Russian ( ), Persian ( ) and Siberian ( Acipenser gueldenstaedtii A. persicus A. ) sturgeons are closely related ‘Ponto-Caspian’ species. Investigation of baerii their population structure is an important problem, the solution of which determines measures for conservation of these species. According to previous studies, ‘baerii-like’ mitochondrial genotypes were found in the Caspian Sea among 3...