水产学报2012，Vol.36Issue(8)：1234-1241,8.DOI:10.3724/SP.J.1231.2012.28003
长江口青草沙水库正式供水前的鱼类群落结构特征
Structure of fish assemblages before drinking-water supplies in Qingcaosha Reservoir of Yangtze River Estuary
摘要
Abstract
In order to provide basic data for the oncoming bio-manipulation based on fish and reference system for hereafter investigating its subsequent effect on fish composition in a newly established water supply reservoir (Qingcaosha Reservoir in Shanghai of China), fish assemblages in this reservoir were sampled by multimesh gillnets from Jul. to Oct. in 2010. A total of 993 individuals, belonging to 18 species, representatives of 5 orders, were caught, of which Cypriniformes accounted for 72.2% of the total species number. Based on importance value, Hemiculter bleekeri, Coilia nasus, Carassius auratus and Pseudoba-grus nitidus were the dominant species. Clustering analysis (CA) showed that fish assemblages significantly differed spatially, and there were marked effects of net size on species composition of fish catch. One-way ANOVA indicated that there were no significant spatial differences in fish diversities. Although Shannon's species diverisity (H') was conspicuously positively correlated with Margalef's species richness (R) and evenness (J), respectively, H' was governed more by R. Invertivorous (44.4%) and omnivorous (33.3%) fishes prevailed in species number among the 4 feeding functional groups, and sedentary fishes (77.8%) predominated among the 4 ecological groups. Contrasting to the adjacent estuarine zone with more species of Perciformes and dominated by estuarine and/or inshore fishes, Qingcaosha Reservoir was characterized by dominance of freshwater or low salinity water fishes. It is presumed that isolation and decreased salinity that resulted from reservoir construction would be responsible for the fish characteristics of Qingcaosha Reservoir.关键词
鱼类多样性/摄食功能群/生态类群/水源地水库/长江口Key words
fish diversity/ feeding functional group/ ecological group/ water source reservoir/ Yangtze River Estuary分类
生物科学引用本文复制引用
胡忠军,吴昊,陈立侨,刘其根..长江口青草沙水库正式供水前的鱼类群落结构特征[J].水产学报,2012,36(8):1234-1241,8.基金项目
上海市科委2009重大专项(09dz1200100) （09dz1200100）
上海市重点学科建设项目(Y1101) （Y1101）
