İnstitute of Zoology, ANAS
Macrozoobenthos of some waters (lakes Gmyl, Gyulalan and Nyugedi, rivers the Atachay, the Gilgilchay) of
the North East Azerbaijan were first investigated in 2008 - 2010. 75 species were found from 13 taxonomic
groups. 65 species were observed in Gmyl lake, 59 – in Gyulalan lake, 54 species - in Nyugedi lake, 16
species – in the Atachay river, 12 species - in the Gilgilchay river. The biomass of organisms in the lakes
changed in the range of 1,13-1,54 g/m2, and the number 282-404 ind./m2, biomass in the rivers was 0,21-
0,34 g/m2, and the number 68-114 ind./m2.