TECHNOLOGICAL FEATURES OF WHITEFISH CULTIVATION IN LAKES OF WEST SIBERIA UNDER CURRENT CONDITIONS
There are discussed the main changes occurred in recent years in ecosystems of small lakes of Western Siberia (hydrochemical regime, forage base, parasitic and fish fauna) as well as in biological indicators of farmed fish. A complex of biotic and abiotic factors behind the changes in environmental conditions of the lakes in the late nineties and early two-thousands has reduced survival of juvenile whitefish that requires adjusting the existing standards of cultivation. We present the technological schemes and whitefish cultivation standards under modern conditions. The standards include fish stocking densities depending on a level of food supply. Commercial return, average fish weight and yield are given. According these standards, it is possible to obtain 7-15 tons of commercial one-summer fishes or 10-18 tons of two-summer fishes from 1 million of peled larvae. Output of commercial one-summer peled x chir hybrids may reach 15-20 tons from 1 million of larvae.