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引用本文:周德勇,叶佳林,王卫民,刘正文.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.湖泊科学,2011,23(5):796-800. DOI:10.18307/2011.0519
ZHOU Deyong,YE Jialin,WANG Weimin,LIU Zhengwen.Feeding habits and the relation to the size of Cultrichthys erythropterus in Meiliang Bay, Lake Taihu:implication for biomanipulation and management. J. Lake Sci.2011,23(5):796-800. DOI:10.18307/2011.0519
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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
周德勇1, 叶佳林1, 王卫民1, 刘正文2
1.华中农业大学水产学院, 武汉 430070;2.中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室, 南京 210008
摘要:
红鳍原鲌是太湖常见鱼类之一.对2004年11月到2005年10月的样本(236尾)分析结果表明:在食物组成上, 红鳍原鲌主要摄食枝角类和小型鱼类, 其食物组成随体长变化明显.全长小于130mm的红鳍原鲌主要摄食枝角类, 小型鱼类的重要性相对较低;全长大于130mm的红鳍原鲌以小型鱼类为主要食物.在对浮游动物的摄食选择性上, 红鳍原鲌喜食溞和哲水蚤成体, 而对桡足幼体、无节幼体、裸腹溞、角突网纹溞和轮虫等小型浮游动物表现出回避.因此, 不同大小红鳍原鲌因食性不同可能产生不同的下行效应, 本文还讨论了红鳍原鲌对湖泊食物网结构和生态系统的影响, 为生物调控和湖泊管理提出了建议。
关键词:  太湖  红鳍原鲌  食物组成  选择性
DOI:10.18307/2011.0519
分类号:
基金项目:国家科技部支撑计划项目(2007BAC26B02)资助
Feeding habits and the relation to the size of Cultrichthys erythropterus in Meiliang Bay, Lake Taihu:implication for biomanipulation and management
ZHOU Deyong1, YE Jialin1, WANG Weimin1, LIU Zhengwen2
1.College of Fisheries, Huazhong Agricultural University, Wuhan 430070, P.R.China;2.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P.R.China
Abstract:
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 130 mm in total length consumed more small fish, but that shorter than 130 mm-long mainly consumed cladocerans.In terms of feeding selec-tivity, 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.
Key words:  Lake Taihu  Cultrichthys erythropterus  feeding habits  selectivity
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