SPECIES COMPOSITION OF HYDROBIONTS OF LAKE STARITSA OF KYZYLZHAR DISTRICT OF THE NORTH KAZAKHSTAN REGION

The article is devoted to the study of the species composition of zooplankton of Lake Staritsa, as one of the indicators of the fish food base of the examined water body. The selection and research of material on the species, quantitative and qualitative composition of zooplankton was carried out using a high-quality tool (Apstein network) and hydrobiological net. The identification of the species composition of aquatic organisms was carried out in the laboratory under microscopes of various series: MBS-10, MCX-200 and MCX-300.
During the determination of zooplankton species, it was established: 9 species of branched crustaceans, 3 species of copepod crustaceans and 1 species of shell crayfish. In quantitative terms, it looks as follows: cladocera - 69%, copepods - 23% and in a smaller number - rotifers - 8%. The most common species in the studied water body is Polyphemus pediculus (37%), less Simocephalus vetulus (22,2%). By the abundance of the species, again, 93.5%, the species Polyphemus pediculus with a population of 110040 ind./m3 prevails and therefore it is attributed to the dominant species, and all the rest (12 species) to small and rare. The studied species composition of the zooplankton of Lake Staritsa allows us to judge the water body as above average feed and can be recommended for fish farming.

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