Morpho-ecological variability of stone loaches (balotoridae, nemacheilus) in the area of Semipalatinsk range influence

Stone loaches from three locations inside Semipalatinsk Range and one control population were investigated. Sampling from all locations except Shagan reservoir was duplicated in several years. There was some depending of all characteristics from the year of sampling. General variability of all population from Semipalatinsk Range was decreased due to decreasing of it genetic part. It means that populations lose part of its genetic diversity. More over, populations from Semipalatinsk Range had increasing stochastic part of general variability and increasing asymmetry of bilateral characteristics. This means that genetic diversity and structure of these populations can be related with destabilization in their genetic structures. (author)