Bivalve mollusk fauna and ecological groups of Unionidae and Corbiculidae families in natural and artificial reservoirs of Uzbekistan

The length of the rivers in Uzbekistan and presence all biotopes mollusks have made they a favourable reservoir for mollusks. However, it should be noted that species differ their density. Rivers fishery farms play great role formation bivalve fauna canals. It was studied Syrdarya River its surroundings major effect on Mirzachul South canals; Zarafshan River’s spreading Dargom Eskiankhor Amudarya surrounding areas influence Amu-Bukhara, Kizketgan Karshi main Colletopterum family breeds water studied, do not show any superiority natural or artificial reservoirs compared to other breeds. Three these are included Red Book Republic (C.baсtrianum, C. cyreum sogdianum, kokandicum). Bactrianum can found only middle Amudarya, river (Syrdarya Region only), Chelak, canals Tuyatortar