This article presents the results of research on the state of the Nura River forage base. The species composition, total mass, and abundance of zooplankton and zoobenthos were determined in the reservoirs. The zooplankton of the studied reservoirs is also diverse and includes widespread species that can be divided into 3 groups: rotifers, branched-moustached, oar-footed crustaceans. In the studied reservoirs, 40 taxa were noted as part of zooplankton, of which 11 species are rotifers, 16 are branched crustaceans, and 13 are oar-footed crustaceans. A.priodonta, P.remata and F.longiseta are dominant in the frequency of occurrence in rotifers, D.сuclata and D.galeata in branchiformes, and representatives of the genus Mesocyclops in copepods. The total species diversity of the benthic complex of the Nura River contains more than 100 species. The abundance of small bivalve mollusks of the families Euglessidae and Pisidiidae, which form the basis of benthic biomass, is very high in the rheotic areas. The bottom population of limnic and areas close to them in terms of characteristics is more diverse in species terms. The dominant species here are the chironomids Chironomidae spp., which had a high number. The forage base of the river sections corresponds to the environmental conditions and allows a certain herd of commercial fish to exist.

This article presents the results of studies of the ichthyofauna of Lake Zerendinskoe in 2020. The ichthyofauna of Lake Zerendinskoe is represented by 7 commercial fish species. The age range of the studied species varied from 2+ to 9+. The biological parameters of bream, carp, common pike, whitefish and common perch varied within the average limits. According to the biological indicators of roach, there is a slightly slowed growth. When studying the sex ratio, there is a predominance of females. The state of the ichthyofauna is considered stable and it is recommended to conduct both sports and amateur, and reclamation fishing, and fishing for reproductive purposes.