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Ribogospod. nauka Ukr., 2026; 1(75): 264-283
DOI: https://doi.org/10.61976/fsu2026.01.264
UDC [639.371.52:639.311]:639.3.043.13

Received: 29.01.2026
Received in revised form: 04.03.2026
Published: 31.03.2026

Results of growing age-1+ common carp (Cyprinus carpio Linnaeus, 1758) in ponds with the introduction of microalgae to their feed composition

A. Tybinka, This email address is being protected from spambots. You need JavaScript enabled to view it. , ORCID ID 0009-0004-8192-4260, Institute of Fisheries of the National Academy of Agrarian Sciences of Ukraine, Kyiv
O. Bernakevych, This email address is being protected from spambots. You need JavaScript enabled to view it. , ORCID ID 0000-0002-9144-8534,Lviv Research Station of the Institute of Fisheries of the National Academy of Agrarian Sciences of Ukraine, Velykyj Lubin
O. Dobrianska, This email address is being protected from spambots. You need JavaScript enabled to view it. , ORCID ID 0000-0001-7238-5059, Lviv Research Station of the Institute of Fisheries of the National Academy of Agrarian Sciences of Ukraine, Velykyj Lubin
E. Varlamov, This email address is being protected from spambots. You need JavaScript enabled to view it. , Chlorella Ukraine LLC, Bila Tserkva 

Purpose. To investigate the productive performance of age-1+ common carp when partially replacing meat-and-bone meal with different amounts of a mixture of dry microalgae chlorella (Chlorella vulgaris) and spirulina (Spirulina platensis) as part of the main diet when growing carp in ponds.

Methodology. The study was conducted in 2025 at the fishery of “Karpatskyi vodogray” LLC in the Pustomyty district of the Lviv region on three ponds, two of which were experimental and one was a control pond. The ponds were stocked with age-1 scaly carp with an average weight of 339.6–342.8 g at a stocking density of 1000 ind./ha. The control group of fish was fed with a balanced compound feed with a protein content of 23-24%, and the two experimental groups were fed a mixture of dry microalgae of chlorella and spirulina in an amount of 3.0% (Experiment 1) and 5.0% (Experiment 2) during a 65-day growing period. Control over the conditions of the aquatic environment was carried out using generally accepted methods in fish farming.

Findings. During the experimental period, optimal conditions for growing carp were provided. The main parameters of the chemical composition of the pond water met fish farming standards, and the average biomass of zooplankton and zoobenthos for the cultivation period ranged from 4.52 to 9.00 g/m3 and 0.91 to 2.15 g/m2, respectively. It was found that the use of a mixture of microalgae at an amount of 3.0 and 5.0% in feeding age-1+ carp had a positive effect on productive parameters, namely: the average fish weight exceeded that of the control group by 12.3 and 20.6%, respectively, and fish productivity increased by 21.4 and 32.2%. At the same time, feed costs for growing carp decreased by 16.3 (Experiment 1) and 26.5% (Experiment 2) compared to the control.

Originality. For the first time in Ukraine, the effect of a mixture of dry microalgae with the aim of partially replacing meat-and-bone meal when introducing them into the main diet of age-1+ carp on productive parameters and feed consumption during cultivation has been studied.

Practical Value. The results obtained indicate that use of a mixture of dry microalgae to partially replace meat and bone meal in compound feeds leads to an increase in the productive parameters of carp and the prospect of further studying the effect of a mixture of microalgae on the physiological and biochemical parameters of the body of age-1+ carp.

Keywords: microalgae, chlorella, spirulina, carp, fish productivity, feed consumption, hydrochemical regime, hydrobiological regime.

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