| 从东江调水后契爷石水库的水质和浮游植物群落结构特征 |
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| 引用本文： | 欧阳昊,韩博平.从东江调水后契爷石水库的水质和浮游植物群落结构特征[J].湖泊科学,2007,19(2):204-211. |
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| 作者姓名： | 欧阳昊 韩博平 |
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| 作者单位： | 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,南京,210008暨南大学水生生物研究所,广州,510632 |
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| 基金项目： | 中国科学院基金
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国家高技术研究发展计划(863计划) |
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| 摘 要： | 本文比较了太湖梅梁湾敞水区2004年秋季渔汛期刀鲚(Coilia ectenes)和间下鱵(Hyporhamphus intermedius)的食性,同时对不同食物的重要性、选择性以及两种鱼类食物的重叠进行了分析.结果表明,秋季刀鲚、间下鱵的食物主要由浮游甲壳动物、鱼和昆虫等组成.镖水蚤中的指状许水蚤(Schmackeria inopinus)是刀鲚最重要的食物,而间下鱵最重要的食物是裸腹溞(Moina sp.),而且摄食鱼和昆虫的比例远高于刀鲚.刀鲚和间下鱵对个体较大的指状许水蚤的选择性都比较高,对个体较小、而在太湖密度很高的象鼻溞(Bosmina spp.)都表现出主动回避.刀鲚与间下鱵的食物重叠系数较高,表明对竞争比较激烈,但要完全了解这两种鱼类的竞争关系,还要对它们在太湖的分布,不同发育阶段和不同季节的摄食情况进行详细的调查研究.
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| 关 键 词： | 太湖 刀鲚 间下鱵 食性 食物重叠 太湖梅梁湾 刀鲚 食性 比较 Lake Taihu Coilia ectenes habits feeding 调查研究 情况 摄食 季节 不同发育阶段 分布 竞争关系 完全 重叠系数 表现 密度 比例 |
| 收稿时间： | 2006-04-27 |
| 修稿时间： | 2006-06-30 |
Water quality and phytoplankton community in the Qiyeshi Reservoir after water diversion from Dongjiang River |
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| OUYANG Hao and HAN Boping.Water quality and phytoplankton community in the Qiyeshi Reservoir after water diversion from Dongjiang River[J].Journal of Lake Science,2007,19(2):204-211. |
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| Authors: | OUYANG Hao and HAN Boping |
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| Institution: | Fisheries College, Huazhong Agricultural University, Wuhan 430070, P.R.China,Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, Nanjing 210008, P.R.China;The Institute of Hydrobiology, Jinan University, Guangzhou 510632, P.R.China and Fisheries College, Huazhong Agricultural University, Wuhan 430070, P.R.China |
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| Abstract: | The feeding habits of Coilia ectenes and Hyporhamphus intermedius of Meiliang Bay of Lake Taihu were investigated in autumn,2004.The relative importance,selectivity of different food items and the diet overlap be- tween the two fish were also analyzed.The results showed that the man food of C.ectenes and H.intermedius in- cluded planktonic crustaceans,fish and insects.Calanoid copepod Schmackeria inopinus was the most important food for C.ectenes,while cladoceran Moina sp.played the most significant role in the food of H.intermedius,H. intermedius fed a much higher proportion of fish and insects than C.ectenes.Both C.ectenes and H.intermedius showed a high positive selection for S.inopinus,but negative selection for Bosmina spp.,the most numerous cla- doceran in Lake Taihu.Diet overlap between C.ectenes and H.intermedius was significant which indicates a strong competition existed.However,in order to have a complete understanding of the competition between C.ectenes and H.intermedius,it needs a further investigation on distribution,ontogenetic and seasonal characteristics of the feed- ing of both fish species in Lake Taihu. |
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| Keywords: | Lake Taihu Coilia ectenes Hyporhamphus intermedius feeding habit diet overlap |
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