Shayhutdinova A.A.1, Krivosheina M.G.2 2020. Invertebrates of hyperhaline reservoirs of the Orenburg Region (Russia) // Russian Entomol. J. Vol.29. No.3: 337–342 [in English].

1 Orenburg Federal Research Center, UB RAS (Institute of Cellular and Intracellular Symbiosis, UBRAS), Pionerskaya St. 11, Orenburg 460000, Russia. E-mail:

2 A.N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Leninsky prosp. 33, Moscow 119071 Russia. E-mail:

doi: 10.15298/rusentj.29.3.15

ABSTRACT. A study of the composition and structure of macrozoobenthos communities of 4 hypergaline reservoirs of resort areas and places of mass recreation in the Orenburg Region: artificial reservoirs on the Tuzlukkol river, a reservoir near the spring of the Gora Boevaya Nature Monument, lakes Maloe Gorodskoe and Tuzluchnoe (Sol-Iletsky lakes) was fulfilled. The taxonomic composition of macro­zoobenthos includes 10 species of Branchiopoda and Insecta. It is shown that an increase in the level of mineralization to 159‰ leads to a decrease in species diversity of biota and halobiont Artemia salina and halophilic Cricotopus salinophilus, Culicoides (Monoculicoides) riethi and Ephydra pseudomurina become dominant species in hyperhaline reservoirs. The development of the shore fly Ephydra attica was confirmed in hyperhaline water bodies at a mine­ra­lization level of 51–67‰; this species, previously known from the territory of Crimea and the Astrakhan region, is recorded on the territory of the Orenburg region for the first time.

KEY WORDS: hyperhaline reservoir, resort area, macrozoobenthos, Branchiopoda, Insecta, dominant species, blood-suckers, reservoirs of bacteria, mass breeding.

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