Fluctuating asymmetry of measurable parameters in Rana arvalis: Methodology

We studied this possibility in two populations of the frog Rana arvalis Nilss. living in the city of Yekaterinburg. In one of these populations, animals live under relatively favorable conditions; in the other, they are exposed to severe, adverse environmental factors, which allowed us to expect considerable destabilization of their ontogeny. Rana arvalis young of the year were captured on August 4 and 5, 2003, in the Kalinovskie Razrezy Park Forest in northern Yekaterinburg (n = 26) and near the Yuzhnaya Bus Terminal (n = 15), respectively.