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中文摘要：
2005年6-7月在抚仙湖采集到底栖软体动物7科8属9种，其出现率为70％，分布的最大水深为118m，平均水深为31m，分布区内的平均密度为614ind·m^-2，平均生物量为80．64g·m^-2。软体动物主要分布在湖湾，在密度方面，长角涵螺和环棱螺占优势，在生物量方面，河蚬和环棱螺占优势。现存量分布北区大于南区，沿岸区大于湖心区，水草区大于无草区。软体动物密度分布主要受湖底理化性质影响，与表层水体营养水平相关关系不显著。
英文摘要：
A total of 9 species of benthic mollusk belonging to 8 genera and 7 families were collected in Fuxian Lake from June to July in 2005. The occurrence frequency of benthic mollusk was 70%, and its maximal distribution depth was up to 118 m, with an average depth of 31 m. The average density and bimass of benthic mollusk in its distribution area were 614 ind · m^-2 and 80.64 g · m^-2, respectively. Benthic mollusk was mainly distributed in lake bends, among which, Alocinma longicornis and Bellamya were dominant in density, while Corbicula fluminea and Bellamya were dominant in biomass. The distribution of standing stock was in the order of north lake 〉 south lake, litoral area 〉 open area, and of submerged macrophyte area 〉 no submerged macrophyte area. It was indicated that the density distribution of benthic mollusk was mainly affected by the physical and chemical properties of lake bottom, and had no significant correlation with the nutrition level of surface water.
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