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Purpose: development of a layout-structural solution and technology for fish-breeding and reclamation complex operation for ecological improvement of phyto-contaminated reservoirs and fish farming in them. One of the urgent environmental problems typical for river and lake reservoirs is the overgrowth of their shallow waters with higher aquatic vegetation. Phyto-contamination of water bodies leads to a depletion of their ecological biodiversity, displacement of valuable species of aquatic flora and fauna, the decrease in their biological productivity and deterioration of conditions for various environmental management (water supply, fish farming, recreation, etc.). Rational and efficient use of natural resources cannot be ensured without ecological improvement of such objects. One of the directions of phyto-contaminated water bodies treatment is to carry out their biological reclamation by the introduction of herbivorous fish species into them. To increase the efficiency of such reclamation, it is proposed to create and use reservoir fish-breeding and reclamation complexes. Materials and Methods. The experimental and theoretical basis for the development of layout-structural solutions and technologies for the operation of such complexes was provided by known information and author's observations of the stocking of reservoirs. Results. The established shortcomings of the applied technologies led to the need to create the complexes that ensure the cultivation of fish stocking material adapted to the conditions of the stocking reservoir and the implementation of acclimatization measures for introducing herbivorous fish into the water body. Conclusions. The layout-constructive scheme and technology of fish-breeding and reclamation complex operation are proposed, which makes it possible to carry out the ecological improvement of phyto-contaminated reservoirs and, in general, to improve conditions, to increase the complexity, efficiency of using their resource potential and fulfillment of nature management.

RESERVOIR FISH-BREEDING AND RECLAMATION COMPLEXES AS OBJECTS OF FISH FARMING AND ECOLOGICAL IMPROVEMENT OF PHYTO-CONTAMINATED IRRIGATION RESERVOIRS