Effects of Pond Water Quality Indicators on Fish Body Weight Gain and Their Optimal Standarts

U.M. Asomiddinov; Kh.B. Yunusov; F.E. Kurbanov; S.S. Jaxongirov; A.G‘. Toshboyeva

Authors

U.M. Asomiddinov Independent Researcher, Assistant in Samarkand State University of Veterinary Medicine, Animal Husbandry and Biotechnologies
Kh.B. Yunusov Scientific Advisor, Doctor of Biological Sciences, Professor Samarkand State University of Veterinary Medicine
F.E. Kurbanov Doctor of Veterinary Sciences, Associate Professor Samarkand State University of Veterinary Medicine, Animal Husbandry and Biotechnologies
S.S. Jaxongirov PhD Student in Samarkand State University of Veterinary Medicine, Animal Husbandry and Biotechnologies
A.G‘. Toshboyeva Student in Samarkand State University of Veterinary Medicine, Animal Husbandry and Biotechnologies.

Keywords:

Common carp (Cyprinus carpio), pond water, hydrochemical parameters, ammonia, dissolved oxygen, body weight, stocking density, water hardness, toxicity, water temperature

Abstract

This study investigates the correlation between hydrochemical parameters and the body weight gain of yearling common carp (Cyprinus carpio) in ponds with different stocking densities (5,000 and 10,000 fish/ha) during the summer rearing season. The research results demonstrate that maximum weight gain occurs under environmental conditions where ammonia levels range from 0.05 to 0.07 mg/L, dissolved oxygen is at least 4.5–5.5 mg/L, water temperature stays between 20.7 and 25.3 °C, and water hardness is maintained at 3.0 mEq/L. Furthermore, the findings indicate that increasing water temperatures combined with decreasing water hardness exacerbate the toxic effects of free ammonia. These results highlight the importance of monitoring the hydrochemistry of intensive aquaculture systems in order to optimise fish growth and health.

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