Analysis of Saprolegniosis Dynamics in Cyprinid Fish and Influencing Hydrobiological Factors in Water Bodies of the Samarkand Region

U.M. Asomiddinov; F.E.  Kurbanov; S.S.  Jaxongirov; U.I. Mukhammadiyev; M.J. Xayriddinov

doi:10.51699/cajmns.v7i2.3216

Authors

U.M. Asomiddinov Independent Researcher, Assistant in Samarkand State University of Veterinary Medicine, Animal Husbandry and Biotechnologies
F.E. Kurbanov Doctor of Veterinary Sciences, Associate Professor in 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
U.I. Mukhammadiyev Samarkand State University of Veterinary Medicine, Animal Husbandry and Biotechnologies
M.J. Xayriddinov Samarkand State University of Veterinary Medicine, Animal Husbandry and Biotechnologies

DOI:

https://doi.org/10.51699/cajmns.v7i2.3216

Keywords:

Saprolegniasis, Cyprinid Fish, Ph Level, Ammonia Nitrogen, Bio-Ecological Factors, Liming, Probiotic, Hydrochemical Analysis

Abstract

This article investigates the impact of bio-ecological water factors on the prevalence of saprolegniosis in cyprinid fish, using fish farms in the Pastdargom district of the Samarkand region as a case study. The study determines those environmental stressors such as water acid (pH 5.46.8), relative oxygen deficiency (5.7 6.1 mg/L) and the excessive amounts of ammonia compounds as main conditions that trigger the disease. Further, the paper breaks down the seasonality of the disease and offers feasible suggestions on how the environment can be fixed. It is suggested to use calcium hypochlorite and slaked lime to sanitise the aquatic medium and to use probiotic called Innoprovit that may potentially help strengthen the general resistance and immunity of the fish community.

References

F. E. Kurbanov, “Epizootiology of fish saprolegniosis and control measures,” Educational Research in Universal Sciences, vol. 1, no. 7, pp. 152–158, 2022.

F. Kurbanov et al., “The number of pathological samples and results obtained by mycologically examined fish Saprolegniosis in Samarkand and Jizzak regions,” BIO Web Conf., vol. 160, p. 02007, 2025, doi: 10.1051/bioconf/202516002007.

K. Yunusov et al., “Distribution of hydrobionts in aquatic ecosystems in different parts of the Akdaryo river,” E3S Web Conf., vol. 539, p. 01012, 2024, doi: 10.1051/e3sconf/202453901012.

U. M. Asomiddinov et al., “Baliqlar Saprolegniozining Kechish Xususiyatlari Va Laborator Tashxisi,” Miasto Przyszłości, vol. 58, pp. 128–137, 2025.

P. C. Lindholm-Lehto, “Saprolegniosis in aquaculture and how to control it?,” Aquaculture and Fisheries, 2024, doi: 10.1002/aff2.200.

T. Tang et al., “Linalool combats Saprolegnia parasitica infections through modulating the gut microbiota of grass carp,” eLife, 2025, doi: 10.7554/eLife.100393.

J. M. Fregeneda-Grandes et al., “Limited probiotic effect of Enterococcus gallinarum L1, Vagococcus fluvialis L21 and Lactobacillus plantarum CLFP3 against Saprolegnia parasitica in rainbow trout,” Animals, vol. 13, no. 5, p. 954, 2023, doi: 10.3390/ani13050954.

S. K. Das et al., “Studies on the identification and control of pathogen Saprolegnia in Indian major carp fingerlings,” Aquaculture Research, vol. 43, no. 12, pp. 1785–1795, 2012, doi: 10.1111/j.1365-2109.2011.03012.x.

S. Costa et al., “Saprolegniosis in amphibians: An integrated overview of a threatening disease,” J. Fungi, vol. 8, no. 5, p. 537, 2022, doi: 10.3390/jof8050537.

R. S. Ovchinnikov, M. G. Manoyan, and A. G. Gaynullina, “Etiological role of non-dermatophyte fungi in superficial mycoses of animals,” Collection of Scientific Works of VGNKI, vol. 68, pp. 148–153, 2007.

S. Kumar et al., “Identification of growth inhibitors of the fish pathogen Saprolegnia parasitica using a high-throughput screening approach,” Frontiers in Microbiology, vol. 11, Art. no. 571093, 2020, doi: 10.3389/fmicb.2020.571093.

P. Tedesco et al., “In vitro activity of chemicals and commercial products against Saprolegnia parasitica and Saprolegnia diclina,” Journal of Fish Diseases, vol. 41, no. 5, pp. 761–772, 2018, doi: 10.1111/jfd.12782.

G. Earle and W. Hintz, “New approaches for controlling Saprolegnia parasitica, the causative agent of saprolegniosis,” in Oomycete Genetics and Genomics: Diversity, Interactions and Research Tools, C. Judelson and S. Kamoun, Eds. Hoboken, NJ, USA: Wiley, 2014, pp. 1–15.

K. Molnár, Field Guide to Warmwater Fish Diseases in Central and Eastern Europe, the Caucasus and Central Asia. Budapest, Hungary: MTA, 2019.

M. I. Khushnazarova, “Prevalence, seasonal dynamics and diagnostics of saprolegniosis in carpsimon fish,” Web of Agriculture: Journal of Agriculture and Biological Sciences, 2025. [Online]. Available: https://webofjournals.com/index.php/8/article/view/4864