太湖梅梁湾红鳍原鲌（Cultrichthys erythropterus）食性与个体大小的关系：对生物调控与管理的启示
太湖梅梁湾红鳍原鲌（Cultrichthys erythropterus）食性与个体大小的关系：对生物调控与管理的启示
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DOI：
10.18307/2011.0519
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
周德勇;叶佳林;王卫民;刘正文
中科院分区：
文献类型：
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作者：
周德勇;叶佳林;王卫民;刘正文
2004年11月至2005年10月，对太湖红鳍鲷（Cultrichthys erythropterus）236尾的食性进行了研究。结果表明，红鳍鲷的食物主要是枝角类和小鱼;不同体长的红鳍鲷的食物组成不同，体长大于130 mm的红鳍鲷摄食小鱼较多，在摄食选择性方面，红鳍隐翅虫对蚤类和中华池石蟹的摄食选择性最强，对桡足类、无节幼体、裸腹蚤类、本文还讨论了红鳍叉尾轮虫在太湖生态系统中的作用，并对太湖管理和生物调控提出了建议。
Cultrichthys erythropterus is a common type of fish in Lake Taihu.Feeding habits of the fish were studied by analyzing 236 specimens from November 2004 to October 2005.The results showed that cladocerans and small fish were the dominant food items of C.erythropterus.Prey compositions of the fish varied in different fish body sizes.C.erythropterus longer than 130mm in total length consumed more small fish,but that shorter than 130mm-long mainly consumed cladocerans.In terms of feeding selectivity,C.erythropterus preferred Daphinia spp.and Limnoithona sinensis,but avoided copepodite,nauplius,Moina spp.,Ceriodaphnia cornuta and rotifers.Thus the top-down effect of C.erythropterus varies with body sizes.The present paper also discussed the role of C.erythropterus in the ecosystem of Lake Taihu and made some suggestions for lake management and biomanipulation.