Lake Datong is the largest lake for aquaculture in Hunan Province,and also one of the typical shallow water lakes in the middle and lower reaches of the Yangtze River.Intensive aquaculture in Lake Datong has been enhanced gradually from 1990s onward when fertilization technology in pisciculture was used.At the same time,the fishing of Corbicula fluminea (Müller,1774) in Lake Datong has been increased gradually for these years due to the higher economic benefits.In order to achieve effective conservation and proper usage of C.fluminea,the present study has investigated the morphological characteristics,standing crops and temporal-spatial distribution of C.fluminea in Lake Datong,with special focus on analyzing the effects of intensive aquaculture and fishing of mollusks on the resources of C.fluminea.Results showed that mean (±SE) wet weight (BW),shell length (SL), shell height (SH),shell width (SW),relative height,roundness and convexity of C.fluminea with shell length longer than 6 mm were 1.41±0.03 g,14.82±0.09 mm,13.73±0.09 mm,9.72±0.06 mm,0.930±0.001,0.660±0.001 and 0.710±0.001,respectively.The relationships between shell length-weight,shell height-weight and shell width-weight of C.fluminea were lg BW=-3.45+3.00 lg SL;lg BW=-3.23+2.89 lg SH;lg BW=-2.87+2.97 lg SW,respectively,which showed that the growth of C.fluminea was isometric.Mean (±SE) density and biomass of C.fluminea in Lake Datong increased