Kotegov B. G. RussiaIzhevskUdmurt State University, 1 Universitetskaya Str., Izhevsk 426034, Russiarutilus@yandex.ru Author's articles COUNTING FEATURE VARIABILITY OF THE CRUCIAN CARP CARASSIUS CARASSIUS (L.) (CYPRINIDAE, ACTINOPTERYGII) FROM SMALL PONDS WITH VARIOUS LEVELS OF ANTHROPOGENIC POLLUTION