Estimation of macrozoobenthos of lake ecosystems affected by commercial rainbow trout cultivation

Results of the hydrobiological research of macrozoobenthos community of the Lake Verchnee Pulongskoye located in the northern part of Karelia are presented. The current status of the benthic fauna in the summer-autumn period under commercial farming of rainbow trout is given. Our data analysis shows that according to the quantitative benthos development level the Lake Verchnee Pulongskoe can be classified as a Р-oligotrophic water body of Amphopodo-Chironomida class. The Lake Verchnee Pulongskoe is a typical water body of the boreal zone with significant lacking of anthropogenic load.