Abstract. In the aquatic ecosystems of the studied area, as the population of Synanodonta genera species increased in age, it was observed that the population indicators such as the occurrence and density of the species decreased, and the population indicators such as the mass of mollusks and the size of the shells increased. The population indicators of Sinanodonta gibba, Sinanodonta gibba and Sinanodonta ruerorum species of the Unionidae family, Sinanodonta genus, distributed in the Syrdarya region of the Syrdarya river, were found to differ from the population indicators in the Gallaorol area of the Sangzor river. the hydrochemical composition of rivers and the water regime have an effect on this was determined. Synanodonta gibba in Syrdarya region of Syrdarya region and Sangzor river Gallaorol regions are distinguished by the fact that individuals of 2-5 years of age are mainly fast-growing, and individuals of 6-9 years of age are a decreasing population. The shell sizes of Sinanodonta gibba and Sinanodonta ruerorum species tend to increase with age was studied.
Keywords: aquatic ecosystems, Sinanodonta, species occurrence, density, population indicators, decline, Unionidae, Sinanodonta gibba, Sinanodonta ruerorum
References:
1. Bolotov, I. N. et al. New taxa of freshwater mussels (Unionidae) from a species-rich but overlooked evolutionary hotspot in Southeast Asia. Scientific Reports 7, 1–18, https://doi.org/10.1038/s41598-017-11957-9 (2017).
2. Bolotov, I. N. et al. A new genus and tribe of freshwater mussel (Unionidae) from Southeast Asia. Scientific Reports 8, 1–12, https:// doi.org/10.1038/s41598-018-28385-y (2018).
3. Bolotov, I. N. et al. Discovery of Novaculina myanmarensis sp. nov. (Bivalvia: Pharidae: Pharellinae) closes the freshwater razor clams range disjunction in Southeast Asia. Scientific Reports 8, 1–12, https://doi.org/10.1038/s41598-018-34491-8 (2018).
4. Bouchet P. Inventorying the molluscan fauna of the world: how far to go? In: K. Jordaens, N. van, 2007. – Р.180;
5. Huber Markus. Compendium of Bivalves. A Full-color Guide to 3, 300 of the Worlds Marine Bivalves. A Status on Bivalvia after 250 Years of Research. – Conch Books, 2010. P. 23;
6. Bogan A.E. Mollusca Bivalvia. Freshwater Animal Diversity Assessment Project (FADA). Belgian Biodiversity Platform. 2010. Р.220;
7. Bogatov V.V., Starobogatov Ya.I. Genus Corbicula in the Amir Reiver (Bivalvia, Corbiculidae) // Ruthinica, 2004, 4(2). – PP. 147 – 150;
8. Bogatov V.V. Comparatory Method and diagnostics of the freshwater large bivalve mollusks (Bivalvia: Unionida) // Abstacts of the cinference Mollusks of the Eastern Asia and Adjacents Seas. – Vladivostok, Russia, 2014. – P.6-12;
9. Tozagul Zhabborova, Khusniddin Baymuradov, Iroda Tuinazarova, Bekzod Otakulov, Azamat Egamkulov. Aquatic ecosystems of the lower reaches of the Zarafshan River. Diversity and ecological groups of mollusks. E3S Web of Conferences 262, 04009 (2021) ITEEA 2021. – P. 1-4.
10. Kh. Boymurodov*, S. Suyarov. Bivalve mollusk fauna and ecological groups of Unionidae and Corbiculidae families in natural and artificial reservoirs of Uzbekistan. E3S Web of Conferences 265, 01014 (2021) APEEM 2021 https://doi.org/10.1051/e3sconf/202126501014
11. Boymurodov Н, Jabborov Kh, Jabbarova Т, Aliyev В., Mirzamurodov О, Egamqulov А. Changes in the habitats of the Unionidae, Euglesidae, Pisididae and sorbiculidae species with the construction of reservoirs in the kashkadarya basin due to climate change // Reliability: Theory and Applications Electronic Journal of International group on reliability journal is registered in the library of the u.s. congress special issue 4 (70)November 2022.345-348 р.
12. Kh. Boymurodov, X.Yunusov, A. Egamkulov, U. Fayzullaev, Saprobic index of bivalve mollusks of families Unionidae and Sorbiculidae distributed in the aquatic ecosystems of Uzbekistan. E3S Web of Conferences 407, 01003 (2023) APEEM 2023 https://doi.org/10.1051/e3sconf/202340701003.
13. Рижинашвили А.Л. Рост, функциональное и биоиндикационное значение популяций перловиц (Bivalvia, Unionidae) в экосистемах водоемов Европейской части России и сопредельных территорий: Автореф. ... дисс. кандидата биол. наук. – Санкт-Петербург, 2009. – 22 с.
14. Иззатуллаев З.И. Фауна моллюсков водных экосистем Средней Азии и сопредельных территорий. Монография. Тошкент: “LESSON PRESS”. 2019. C. 328
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