New findings of the Chinese sleeper Perccottus glenii (Odontobutidae) in water bodies of Transbaikal krai
The biological pollution of water bodies under effect of the natural and anthropogenic factors is a widespread phenomenon in the water ecosystems. The rotan Perccottus glenii , a representative of Amur ichthyofauna, has broadened intensively its range for a period of several decades. It assimilated the new water bodies with the different hydrochemical regimes, occupying new ecological niches. By the present time, several centers of expansion of the rotan are picked up: St. Petersburg, Moscow, Central Asian–Kazakhstan, and Baikal regions (Bolonev et al., 2002).