The results of integrated monitoring of the Pravdinsk reservoir (Kaliningrad region)

Abstract

As a result of a study of the Pravdinsk reservoir, it was found that the radiation situ ation can be estimated as safe. According to microbiological indicators, the water quality was assessed as polluted with β, α-mesosaprobic, 3-4 classes of water quality. During the "bloom" of water by Cyanobacteria, we observed the toxic effect on the test organisms Daphnia magna and Ceriodaphnia affinis, in this period the consumption of phytoplankton by zooplankton was low. According to benthos biomass, the reservoir is assessed as a water body with a high food value. The ichthyofauna included 14 species of fish that belonged to families of Cyprinidae, Percidae, Gadidae and Esocidae. 11 species of parasites related to Microsporidia, Myxosporidia, Trematoda, Cestoda, Hirudinea and parasitic Crustacea were found. Metatercaria of trematoda Apophallus müehlingi pathogenic for humans were found in roach and perch.