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Ribogospod. nauka Ukr., 2025; 4(74): 157-179
DOI: https://doi.org/10.61976/fsu2025.04.157
UDC 639.371.52:[639.311:574]

Effect of environmental conditions on the results of growing new commercial carp lines

Т. Hryhorenko, This email address is being protected from spambots. You need JavaScript enabled to view it. , ORCID ID 0000-0002-8769-1443, Institute of Fisheries of the National Academy of Agrarian Sciences of Ukraine, Kyiv
А. Derenko, This email address is being protected from spambots. You need JavaScript enabled to view it. , ORCID ID 0009-0007-7836-9560, Institute of Fisheries of the National Academy of Agrarian Sciences of Ukraine, Kyiv
N. Chuzhma, This email address is being protected from spambots. You need JavaScript enabled to view it. , ORCID ID 0000-0002-9901-0991, Institute of Fisheries of the National Academy of Agrarian Sciences of Ukraine, Kyiv
А. Bazaieva, This email address is being protected from spambots. You need JavaScript enabled to view it. , ORCID ID 0000-0002-0509-1349, Institute of Fisheries of the National Academy of Agrarian Sciences of Ukraine, Kyiv
N. Мykhailenkо, This email address is being protected from spambots. You need JavaScript enabled to view it. , ORCID ID 0000-0003-0773-4886, Institute of Fisheries of the National Academy of Agrarian Sciences of Ukraine, Kyiv

Purpose. To investigate the ecological conditions and peculiarities of the development of the natural food sources of ponds when growing age-0+ new commercial lines of carp.

Methodology. The study was conducted in nursery ponds of the State Enterprise “Nyvka Experimental Farm”. In the experimental ponds, fish seeds of new commercial carp lines were grown, which were obtained as a result of crossing females of the few scaled Nyvka hatchery line of intrabreed types of carp with scaly and framed males of carp of the Polish line, which were imported from a fish farm of the Olsztyn Voivodeship. The control were age-0+ few scaled Nyvka hatchery line of the intrabreed type of the Ukrainian carp breed. The age-0+ carps were grown in monoculture at a stocking density of 100 thousand ind./ha using semi-intensive technology. To stimulate the development of the natural food sources, organic fertilizers were applied in the spring at a rate of 3.0 t/ha. During the growing season, the temperature and hydrochemical regimes were systematically monitored and the peculiarities of the development of the natural food sources of the ponds were studied. In doing so, methods generally accepted in hydrochemistry, hydrobiology and fish farming were used. The influence of environmental conditions on the results of growing age-0+ intrabreed carps was assessed by their survival, average weight, fish productivity, and consumption of artificial feeds.

Findings. It was established that the ecological conditions for rearing age-0+ carps were satisfactory. The physicochemical parameters of the ponds’ aquatic environment were within technological standards and contributed to the development of a natural food sources and fish farming. Timely preparation of nursery ponds for stocking and application of organic fertilizers ensured the development of prey organisms during the growing season at a level sufficient to meet the nutritional needs of carp juveniles. The average biomass of phytoplankton during the growing season was within 28.84-47.80 mg/dm3, zooplankton – 15.20-40.22 g/m3, zoobenthos – 3.64-17.42 g/m2.The average weight of age-0+ crossbred carps in the experimental variants was 61.4 and 281.0 g, the yield from cultivation was 40.2 and 5.7%, respectively, fish productivity was 2468.3 and 1601.7 kg/ha with artificial feed consumption at the level of 1.46 and 1.06 kg/kg. In the control, the average weight of age-0+ carps was 36.1 g, yield was 36.5%, fish productivity was 1317.7 kg/ha, and artificial feed consumption was 1.55 kg/kg.

Originality. The ecological conditions and development of the natural food sources of ponds during the cultivation of new commercial carp lines were studied and analyzed. It was established that higher values of quantitative development and qualitative composition of prey organisms in the experimental ponds contributed to achieving higher productive parameters of age-0+ crossbred carps and ensured a reduction in the cost of artificial feeds by 1.1-1.5 times.

Practical Value. Studying environmental conditions and determining their effect on fish makes it possible to purposefully shape the ecosystem of water bodies in order to increase fish productivity.

Keywords: nursery ponds, hydrochemical regime, natural food sources,  phytoplankton, zooplankton, zoobenthos,  carp yearlings.

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