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Ribogospod. nauka Ukr., 2026; 1(75): 284-304
DOI: https://doi.org/10.61976/fsu2026.01.284
UDC 639.512.04

Received: 23.12.2025
Received in revised form: 04.03.2026
Published: 31.03.2026

Growth rates of giant freshwater prawn (Macrobrachium rosenbergii de Man, 1879) on different diets

K. Voznyuk, This email address is being protected from spambots. You need JavaScript enabled to view it. , ORCID ID 0009-0002-7835-1508, National University of Life Resources and Environmental Management of Ukraine, Kyiv
V. Bekh, This email address is being protected from spambots. You need JavaScript enabled to view it. , ORCID ID 0000-0002-4254-815X, National University of Life Resources and Environmental Management of Ukraine, Kyiv

Purpose. Determination of the effect of different types of feeding on growth rates, survival and feed utilization efficiency of juvenile Macrobrachium rosenbergii under laboratory cultivation conditions.  

Methodology. Experimental studies were conducted for 45 days in laboratory conditions. Three experimental groups of M. rosenbergii juveniles were formed, each with 15 individuals. The control group received industrial granulated feed, the second experimental group received exclusively live feed (mainly daphnia, cyclops and Artemia nauplii), and the third group received a combined diet consisting of granulated and live feed in a ratio of 1:1 by weight. Hydrochemical parameters of the aquatic environment were maintained within optimal limits for this species.

Findings. The type of feeding affected the growth rate and efficiency of feed utilization by M. rosenbergii juveniles, with significant differences in growth rates between the control and combined feeding options appearing at the end of the experiment (p < 0.05). The highest growth rates were recorded in the group with a combined type of feeding. During the cultivation period, the average weight of individuals in this group increased 4.2 times and reached 12.85 ± 0.95 g, while in the control and second experimental groups the increase was 3.6 and 3.9 times, respectively. A similar trend was observed in linear growth: the average body length in the combined group was 7.91 ± 0.21 cm, which exceeded those ​​for other feeding variants. The lowest feed conversion ratio was recorded in the combined diet group (1.52), indicating a more efficient use of feed resources. In addition, this group showed higher activity of individuals and more saturated color of the shell as well as a tendency towards an increased survival rate.

Originality. The work complements the existing data on the effect of different types of feeding on the growth and survival of M. rosenbergii juveniles and clarifies the peculiarities of the effectiveness of combined diets under laboratory cultivation conditions.

Practical Value. The results obtained can be used to optimize feeding schemes for M. rosenbergii in aquaculture farms, which will contribute to increasing cultivation productivity, reducing feed costs and improving the quality of the final product.

Keywords: aquaculture, feeding strategy, combined diet, growth rate, feed conversion, juvenile survival.

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