Abstract

Species composition of black flies pre - imago stages was investigated in different types of inland waters ( large , middle and small rivers , brooks and reclamation channels of Moscow, Ryazan and Tver regions ) . There were found 9 species of Simuliida e in large rivers , 12 - in mi ddle rivers , 14 - in small , 10 - in reclamation channels . Larvae and pupae inhabit coastal area on hydrophytes , rocks , water objects, etc . Dominant , subdominant and scanty black flies species were discovered . Maximum of population density was registered in the late May - early June and was up to 700 flies per 1 dm 2 in average .

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