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WATER, LAND AND FOREST RESOURCES

SPECIES COMPOSITION OF THE ICHTHYOFAUNA OF THE KARAOZEK RIVER (SYRDARYA BASIN)

Fariza Amirbekova 1 , Eleonora Kozhabayeva 1 , Perizat Nurlybekova 2 , Salamat Karlybayuly 3 , Zamira Bolatbekova 3 , Galymzhan Iskhakhov 4

1 Al-Farabi Kazakh National University; 2 KSU «Secondary School № 4»; 3 LLP «Fisheries Research and Production Center»; 4 Aral branch of the Research and Production Center for Fisheries LLP

doi.org/10.37884/3-2025/37 pp. 388-396 Admitted 10.07.2025 Published 30.09.2025

Abstract

Background and Aim.  The Karaozek River is one of the most important in the Syrdarya basin. In recent years, studies have been conducted to determine the species composition and assess the current state of the ichthyophane of the Karaozek River. In this regard, it is of great importance to determine and evaluate the current species composition of the ichthyofauna of the Karaozek River.

Materials and methods. To determine the composition of the ichthyofauna, nets were set and the species composition of the fish caught was determined, as well as an estimate of the length, weight and upitonicity of the fish.

Results. The ichthyofauna of the studied river comprised 11 fish species: 6 indigenous and 5 non-indigenous. All captured fish belong to 7 families: Cyprinidae, Leuciscidae, Acheilognathidae, Xenocyprididae, Gobionidae, Percidae, Gobiidae. Among the captured fish, species from the carp family are the most widespread. The proportion of indigenous fish species inhabiting the Karaozek River significantly exceeds the non-indigenous ichthyofauna, constituting 54.4% of the total volume. Based on the results of the work, thespeciescomposition of the ichthyofauna of the KaraozekRiver was determined andthecurrentstate of nativefishspecies was assessed.

Conclusion. According to the results obtained, there are no sharp changes in the hydrochemical parameters of the Karaozek River water, no threats to the vital activity of aquatic organisms and fish have been identified. The species composition of native fish has been preserved in the ichthyofauna, which indicates that native fish species are not strongly affected by alien fish species.

Karaozek River aboriginal alien ichthyofaunal community composition diversity

01 Introduction

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02 References

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Citation Links

[1]2025. SPECIES COMPOSITION OF THE ICHTHYOFAUNA OF THE KARAOZEK RIVER (SYRDARYA BASIN). Izdenister natigeler. 3 (107) (Sep. 2025), 388–396. DOI:https://doi.org/10.37884/3-2025/37.
(1)SPECIES COMPOSITION OF THE ICHTHYOFAUNA OF THE KARAOZEK RIVER (SYRDARYA BASIN). Izdenister natigeler 2025, No. 3 (107), 388-396. https://doi.org/10.37884/3-2025/37.
SPECIES COMPOSITION OF THE ICHTHYOFAUNA OF THE KARAOZEK RIVER (SYRDARYA BASIN). (2025). Izdenister Natigeler, 3 (107), 388-396. https://doi.org/10.37884/3-2025/37
SPECIES COMPOSITION OF THE ICHTHYOFAUNA OF THE KARAOZEK RIVER (SYRDARYA BASIN). Izdenister natigeler, [S. l.], n. 3 (107), p. 388–396, 2025. DOI: 10.37884/3-2025/37. Disponível em: https://natsus.kaznaru.edu.kz/index.php/research/article/view/962. Acesso em: 15 sep. 2026.
“ SPECIES COMPOSITION OF THE ICHTHYOFAUNA OF THE KARAOZEK RIVER (SYRDARYA BASIN)”. 2025. Izdenister Natigeler, no. 3 (107) (September): 388-96. https://doi.org/10.37884/3-2025/37.
“ SPECIES COMPOSITION OF THE ICHTHYOFAUNA OF THE KARAOZEK RIVER (SYRDARYA BASIN)” (2025) Izdenister natigeler, (3 (107), pp. 388–396. doi:10.37884/3-2025/37.
[1]“ SPECIES COMPOSITION OF THE ICHTHYOFAUNA OF THE KARAOZEK RIVER (SYRDARYA BASIN)”, Izdenister natigeler, no. 3 (107), pp. 388–396, Sep. 2025, doi: 10.37884/3-2025/37.
“ SPECIES COMPOSITION OF THE ICHTHYOFAUNA OF THE KARAOZEK RIVER (SYRDARYA BASIN)”. Izdenister Natigeler, no. 3 (107), Sept. 2025, pp. 388-96, https://doi.org/10.37884/3-2025/37.
“ SPECIES COMPOSITION OF THE ICHTHYOFAUNA OF THE KARAOZEK RIVER (SYRDARYA BASIN)”. Izdenister natigeler, no. 3 (107) (September 30, 2025): 388–396. Accessed September 15, 2026. https://natsus.kaznaru.edu.kz/index.php/research/article/view/962.
1.SPECIES COMPOSITION OF THE ICHTHYOFAUNA OF THE KARAOZEK RIVER (SYRDARYA BASIN). Izdenister natigeler [Internet]. 2025 Sep. 30 [cited 2026 Sep. 15];(3 (107):388-96. Available from: https://natsus.kaznaru.edu.kz/index.php/research/article/view/962
1.SPECIES COMPOSITION OF THE ICHTHYOFAUNA OF THE KARAOZEK RIVER (SYRDARYA BASIN). Izdenister natigeler. 2025;(3 (107):388-396. doi:10.37884/3-2025/37