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№1 (56)-2020

 
Abstract
The article presents an analysis of materials on biomass and abundance of 
zoobenthos of the Kigash River for 2018-2019. The taxonomic composition and 
distribution of fodder zoobenthos for 2019 is shown. The bottom communities of 
the studied reservoir are influenced by abiotic and biotic factors, due to this, 
there is a fluctuation in the qualitative and quantitative state of zoobenthos. The 
study of zoobenthos p. Kigash was carried out on biotopes: Kamyshinka, Sand 
and Nizhny Bogatinsky in the spring, summer and autumn. For the study of 
benthic fauna in the two studied years, 18 hydrobiological samples were taken 
from the reservoir. In 2019, 13 taxa from four groups were identified in the 
species composition of zoobenthos: worms, crustaceans, mollusks, and insects. 
Numerous in the river were oligochaetes worms, which formed the basis of the 
fish food base. The trophicity of the reservoir in 2019 corresponded to a low food 
grade.
Key words:
Kigash 
river, 
zoobenthos,taxonomic 
composition, 
benthofauna, abundance, biomass, trophicity. 


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