【摘要】 针对水体生态修复过程中沉水植物恢复和扩繁期间受草鱼Ctenopharyngodon idellus等鱼类影响的严重问题,3月(春季)、7月(夏季)、10月(秋季)和12月(冬季)采用网目为20 mm、25 mm、33 mm、40 mm、50 mm、60mm、70 mm和80 mm的8种浮刺网串联而成的网具,按季度12次调查了杭州西湖子湖茅家埠、浴鹄湾、乌龟潭和小南湖4个湖区的鱼类组成。调查期间,共采集鱼类样本1 427尾,隶属于3科13属13种。其中,茅家埠水域以杂食性鱼类为主,乌龟潭和浴鹄湾水域以草食性鱼类为主,小南湖水域以肉食性鱼类为主。不同月份茅家埠、浴鹄湾和小南湖3个湖区的鱼类优势种不同,4个月份中乌龟潭水域的优势鱼种均为草鱼。文中提出采取围网或优先种植鱼类不喜食植物来促进沉水植物群落恢复的措施,为湖泊生态修复中水生植被重建提供相关的背景资料和参考。更多还原

【Abstract】 Fish species composition was surveyed 12 times quarterly in restoration areas of submerged plants in the lake district of Maojiabu, Yuhuwan, Wuguitan and Xiaonan areas, West Lake, Hangzhou, in March(spring), July(summer), October(autumn)and December(winter)using combined 8 kinds of floating gill nets with meshes of 20 mm, 25 mm, 33 mm, 40 mm, 50 mm, 60 mm, 70 mm and 80 mm in series in order to deal with the serious problems caused by grass carp(Ctenopharyngodon idellus)and other fish during the restoration and propagation of submerged plants in the process of ecological restoration of water bodies. A total of 1,427 fish samples were collected, and identified as 13 species of fish, belonging to 13 genera and 3 families, with abundant omnivorous fish in Maojiabu Lake, mainly herbivorous fish in Wuguitan Lake and Yuhuwan Lake and bundant carnivorous fish in Xiaonanhu Lake.There were different dominant fishes in Maojiabu Lake, Yuhuwan Lake and Xiaonanhu Lake in different months, but grass carp was the dominant fish in Wuguitan Lake during all the survey period. The suggestion that the restoration of submerged plant communities be promoted by seining measures or firstly vegetation of the plants that fish do not prefer to feed is put forward to provide relevant background information for aquatic plants reestablishment and theoretical references for the selection of submerged macrophytes in water ecological restoration.更多还原