Current state of macrobenthos of Kama and Votkinsk reservoirs

275 taxa were registered in benthic fauna of Kama and Votkinsk reservoirs during 2000 to 2016. Low fourage biomasses are typical for Kama and Votkinsk reservoirs during almost all their lifetime. Nowadays average fourage biomass does not exceed 5.5 g/m2. Kama reserovoir drawdown reaches 78.05%) of its volume during autumn and winter and that is limiting factor for benthic fauna development especially at shallows. The same is true for Votkinsk reservoir which is drawning up to 40.72%> of body volume. Sylva Bay in Kama reservoir and deep zone near dam in Votkinsk reservoir are an exception and due to mass development of young dreissenids and crustaceans can be rated as high trophic zones.