Polymorphism on the basis of striata in the populations of a marsh frog Rana ridibunda Pallas, 1771 (Anura, Amphibia) in the Republic of Bashkortostan

Polymorphism on the basis of striata in the populations of a marsh frog Rana ridibunda Pallas, 1771 was investigated in 2006-2012 in the Republic of Bashkortostan in the areas with an average concentration of heavy metals – Cis-Urals, and Trans-Urals - with a high natural background concentration of heavy metals (copper, zinc, cadmium). It was found that in industrial pollution frogs with a sign striata accumulate less concentration of heavy metals in Cis-Urals – copper in 1,9, cadmium in 1,4, zinc in 1,2 times; in Trans-Urals - cadmium in 12,8, copper in 1,9, plumbum in 1,6 times.