Abstract
The length of the reservoir area on the banks of the Zarafshan River and the presence of all biotopes inhabited by molluscs of the Unionidae and Corbisulidae families have made the basin a comfortable aquatic ecosystem for molluscs. The influence of rivers and fisheries on the formation of the fauna of bivalve molluscs in reservoirs is significant. We found that 10 species and 2 subspecies of bivalve molluscs were distributed in the Kuymazor reservoir and 8 species and 2 subspecies of bivalve molluscs in Shurkul. Reservoirs of Sinanodonta species are shown for the first time by us. These molluscs belong to the ecological groups like peloreophilic, rheophilic and pelolimnophilic. In the water reservoirs of Uzbekistan, the spread of bivalve molluscs by groups has common features. In all water reservoirs, an ecological group called peloreophil prevails, but the species belonging to the ecological group atre different in different water bodies. Such species of pedloelphils as Sinanodonta gibba, S. orbicularis, Corbiculina tibetensis and C. ferghanensis are predominantly found in rivers, fish farms, and water reservoirs. The most common species in the canals are Corbiculina tibetensis and C. ferghanensis. The next frequent occurrence in water reservoirs is the ecological group of rheophiles.
Highlights
The length of the reservoir area on the banks of the Zarafshan River and the presence of all biotopes inhabited by molluscs of the Unionidae and Corbisulidae families have made the basin a comfortable aquatic ecosystem for molluscs
One of the current problems is the study of the effect of abiotic factors on the biodiversity of bivalve molluscs in the Lower Zarafshan reservoirs
In the lower reaches of the Zarafshan River, the influence of abiotic factors on the biodiversity in the populations of bivalve molluscs belonging to the Unionidae and Corbiculidae families from the Kuymazor and Shurkul reservoirs was studied, the following findings have been found
Summary
The length of the reservoir area on the banks of the Zarafshan River and the presence of all biotopes inhabited by molluscs of the Unionidae and Corbisulidae families have made the basin a comfortable aquatic ecosystem for molluscs. In the lower reaches of the Zarafshan River, the influence of abiotic factors on the biodiversity in the populations of bivalve molluscs belonging to the Unionidae and Corbiculidae families from the Kuymazor and Shurkul reservoirs was studied, the following findings have been found. Previous studies and our research have shown that 10 species and 2 subspecies of bivalve molluscs live in the Kuymazor reservoir, which belong to two families and 4 generations (Table 1).
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