Key words: Arvicola amphibius, population size, Eurasian water vole.
Eurasian water vole, Arvicola amphibius (Linnaeus, 1758), has a confusion in nomenclature.
Arvicola amphibius has semiaquatic and fossorial ecological forms (Kratochvil, 1983).
Stoats, Mustela erminea and weasels, Mustela nivalis prefer the same habitat as water voles and they prey on Arvicola amphibius and Microtus voles (Elmeros, 2006; Sidorovich et al.
The aim of this paper was to determine changes in the body weight, sex ratio, population size, and habitat features of Arvicola amphibius in Turkey, using the capture-mark-recapture method.