Bivalve mollusks (mollusca, bivalvia) indicators of different types of reservoir bodies and watermarks of the rivers basin of Uzbekistan

¹ Samarkand State University named after Sharof Rashidov, 140104, University, Boulevard, 15. Samarkand,. Uzbekistan
² Samarkand State University of Veterinary Medicine, Animal Husbandry and Biotechnology.

^* Corresponding author: zizzat@yandex.ru

Abstract

As a result of studying different types of reservoirs and watercourses of rivers in Uzbekistan, the species composition of indicator bivalve mollusks was established, belonging to 24 species, 3 subspecies, 11 genera and 5 families. 10 species and 3 subspecies of them are large, the rest 14 are small bivalves. All of them are good water biofilters. The majority of biofilters inhabit reservoirs and canals (11 species), but in the latter there are more α – mesasaprobic mollusks and they are more polluted, and the anthropogenic influence is clearly manifested here. In terms of water pollution, the rivers are classified as moderately polluted classes III – IV; differences in the composition of saprobic species in the middle and lower reaches of rivers have been identified. In general, the water bodies of Uzbekistan are clean and there are no polysaprobic mollusks here.