Abstract
Conditions of reproduction and distribution of the Black Sea trout Salmo trutta labrax in the basin of the Mzymta River after Olympic objects′ construction are considered. In the main river channel of the Mzymta, the structure of spawning and nursery grounds are destroyed along 57 km from the river mouth. The total area of these grounds in the Mzymta basin is 572800 m2, and 49% of this area is situated above the dam of the Krasnopolyanskaya Power Plant and is inaccessible for spawners of the migratory form of the Black Sea trout listed in the Red Data Book of the Russian Federation. Consequently, natural reproduction of the migratory form discontinued. The resident form of trout still exists in the upper parts of the Mzymta and in 19 of its tributaries not affected by construction. On the 2.4-km-long stretch of the riverbed situated below the inflow of the Pslukh tributary, the substrate is in the process of natural restoration due to the descent of mudslides followed by washing of the substrate by the flow. The river is partially inhabited by trout individuals from habitats not affected by construction.
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Original Russian Text © D.S. Pavlov, A.E. Veselov, V.V. Kostin, D.A. Efremov, M.A. Ruchiev, S.B. Tuniev, 2018, published in Voprosy Ikhtiologii, 2018, Vol. 58, No. 1, pp. 87–97.
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Pavlov, D.S., Veselov, A.E., Kostin, V.V. et al. Current State of Conditions for Reproduction of the Black Sea Trout Salmo trutta labrax in the Mzymta River. J. Ichthyol. 58, 93–103 (2018). https://doi.org/10.1134/S0032945218010101
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DOI: https://doi.org/10.1134/S0032945218010101