Khudyy O.I. The condition of ichthyofauna in the Dnister reservoir as influenced by anthropogenous factors. – The manuscript.
The dissertation on reception of a scientific degree of Cand.Biol.Sci. on a speciality 03.00.10 - ichthyology. Institute of hydrobiology NAS of Ukraine. Kiev, 2005.
The dissertation is devoted to finding-out of features of the structurally functional organization of the Dnister reservoir ichthyocoenosis in conditions of complex economic use of the given reservoir.
It is established, that as a result of hydraulic engineering construction and salt pollution from ichthyofauna a site of the Dnister which is known as the modern Dnister reservoir, 12 species of fishes have disappeared, however 7 new species have appeared, 2 of which are undesirable strangers. The part of phytophilous fishes makes about 70 % of the total of individuals, lytophilous fishes - only 15-20 %, the others are indifferents to the spawning substratum of the species.
The features of variability of the external and internal structure of fishes (according to the example of bream and roach) are characterized in conditions of the Dnister reservoir. Also the structure of populations bream and roach in the given reservoir is covered.
It is revealed, that previous years’ industrial catches are characterized by poor quality – in the overwhelming majority of resolved smallcell networks the particle of small catches make 75-85 %, which considerably exceeds the resolved norms. The parameter catch of the average grid of the control order also has decreased.
Key words: the Dnister reservoir, ichthyofauna, population structure, craft species, curiosity species.
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