STATE OF THE FEED BASE OF THE YESIL RIVER

Abstract

This article presents the results of research on the state of the forage base of the Yesil river. A total of 19 species of planktonic invertebrates (including 6 rockets, 8 shrubs, and 5 comb crayfish) and 20 species of benthic organisms were observed during the 2019 study period. According to the development of zooplankton and zoobenthos, the Yesil river is an average reservoir of the feed class and belongs to the α-mesotrophic reservoirs in accordance with the "trophic scale" of S.P. Kitaev. In general, the biomass of nutrient organisms on the river is low, this is taken into account due to the rapid flow of the river, the complete absence of any streams, backwaters, bays that can produce invertebrate hydrobiont biomass. Considering that according to the results of the study of the nutrition spectrum of common perch and cakes, there are practically no limited nutritional resources of plant origin, it should be noted that the Yesil river had relatively high nutritional levels of these species.