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Ribogospod. nauka Ukr., 2026; 1(75): 57-79
DOI: https://doi.org/10.61976/fsu2026.01.057
UDC 556.55:639.2/.3(477)

Received: 20.01.2026
Received in revised form: 02.03.2026
Published: 31.03.2026

Potential for fisheries use of small reservoirs of Western Polissya of Ukraine

V. Sondak, This email address is being protected from spambots. You need JavaScript enabled to view it. , ORCID ID 0000-0001-9968-2715, National University of Water and Environmental Engineering, Rivne
О. Buzevych, This email address is being protected from spambots. You need JavaScript enabled to view it. , ORCID ID 0000-0003-0971-9890, Institute of Fisheries of the National Academy of Agrarian Sciences of Ukraine, Kyiv

Purpose. Analysis of indicators characterizing the general suitability of reservoirs of Western Polissya for fish ranching in the context of increasing domestic production of marketable fish, taking into account the current ecological state of water bodies that are promising for the organization of special commodity fish farms.

Methodology. The study of the state of the natural food supply was carried out by collecting and processing samples of phytoplankton, zooplankton, zoobenthos and macrophytes using generally accepted methods. The assessment of surface water quality was carried out based on the main hydrochemical parameters. Bioproduction reserves were determined based on the potential fish production by prey aquatic organisms. The volumes of possible harvest of introduced species, taking into account the possibility of organizing specialized fish harvest, were taken as φF=0.50.

Findings. Western Polissya is characterized by a sufficiently developed fund of fishery water bodies, however, the catch of aquatic biological resources in the last 15 years was characterized by a steady downward trend: with a maximum in 2014 and a further decrease to 56-182 t in 2018-2019 and 1-2 t in 2020-2022. According to the main hydrochemical parameters, the water of the Mlyniv and Krychevychi reservoirs generally meets the requirements for fishery water bodies. The average biomass of phytoplankton of the Mlynivka Reservoir in the summer of 2023 was 20.79 g/m3, zooplankton - 1.24 g/m3, food zoobenthos - 1.45 g/m2; for the Krychevychi Reservoir (summer 2024) they were 4.11 g/m3, 0.10 g/m3, and 3.72 g/m2, respectively. The rational use of the bioproduction potential of these reservoirs should be based mainly on increasing the abundance of silver carp. Implementation of measures to stock the specified reservoirs with Chinese and common carps will allow increasing fish productivity (based on commercial returns) to 98 kg/ha (Krychevychi Reservoir) and 187 kg/ha (Mlyniv Reservoir) with a total catch rate of aquatic biological resources at the level of 115 tons per year).

Originality. Original data were obtained that highlighted the state of the aquatic ecosystems of the Mlyniv and Krychevychi reservoirs in terms of their suitability for fish ranching. The need for a differentiated approach to determining the species composition and volume of introduced species in accordance with the development of groups of aquatic organisms that make up the natural food supply of fish has been confirmed.

Practical Value. The results obtained can be used in the preparation of scientific substantiation of regulatory and methodological documents that determine the procedure for the organization, functioning and control of enterprises that use water bodies for fish ranching farming in the regime of special use of aquatic biological resources.

Keywords: reservoir, fish productivity, natural food supply, artificial reproduction of ichthyofauna.

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