CHARACTERISTIC OF ZOOPLANKTON STARITSA VISHNEVSKAYA KYZYLZHARSKY DISTRICT

Aquatic invertebrates, in addition to being an object of food for a number of organisms, also act as indicators of the environment. Studies of the zooplankton of the oxbow lakes of the Vishnevskaya Kyzylzhar region made it possible to establish their species composition, as well as quantitative indicators and peculiarities of distribution in the reservoir, depending on the habitat conditions. It was found that the species composition does not differ in diversity. During the research season, only 13 species were found. Moreover, for observation stations, the indicators differed significantly. On the first of them the presence of 6 species was established, on the second - 9 and on the third - 12. The most common species for this reservoir is Polyphemus pediculus, with 37% indicator. Species such as Acanthocyclops viridis - 33.3% and Simocephalus vetulus - 22.2% are quite common. The study of the species composition of zooplankton in the seasonal aspect showed the poverty of the spring and the richness of the summer-autumn zooplankton. In particular, only 2 species were recorded in May, 7 in July, and 9 in September. When analyzing the quantitative indicators of zooplankton for the entire growing season, two peaks of abundance are traced, the first in mid-June with a number of 40,073 ind./m3, and a biomass of 9.867 g / m3. In mid-September, the second peak of abundance is observed, at which the amount of zooplankton is 1680 ind./m3, with a biomass of 3.85 g / m3.
The results of the study showed that Vishnevskaya oxbow belongs to the above average water bodies.

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