| 摘要: |
| 于1995年6月—1997年12月,对徐家河水库枝角类优势种群的密度和近太湖新银鱼(Neosalanx pseudotaihuensis)的生物量(单位努力量渔获量)进行了初步调查,以期研究银鱼与浮游动物的关系。结果表明,在1995年银鱼的生物量较高时,透明薄皮(Leptodora kindti)、盔形(Daphnia galeata)和模糊秀体(Diaphanosoma dubia)等大型枝角类的密度较低;在1997年银鱼的生物量较低时,这三种枝角类的密度则较高。而象鼻(Bosmina spp.)这样的小型枝角类恰恰相反,当银鱼的生物量较高时,其密度较高;反之,其密度较低。表明银鱼可以对枝角类产生显著的影响。 |
| 关键词: 银鱼,枝角类,捕食 |
| DOI： |
| 分类号: |
| 基金项目:中国科学院留学回国择优基金和奥地利科学交流中心资助,EZA894-96号 |
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| RELATIONSHIPS BETWEEN THE DOMINANT CLADOCERANS AND THE ICEFISH NEOSALANX PSEUDOTAIHUENSIS IN XUJIAHE RESERVOIR |
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LIU Zheng-Wen1, WU Qing-Long1, CHEN Yuan-Gao1, WANG Wei-Min2, LIU Xing-Guo3, CHEN Xi-Liang3, XIONG Qing-Yuan3, TU Yan-Qing3
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1.Nanjing Institute of Geography and Limnology, The Chinese Academy of Sciences;2.Fishery College, Huazhong Agricultural University;3.Guangshui City Fishery Bureau
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| Abstract: |
| In order to study the interactions between icefishes and zooplankton, investigations into the densities of the dominant cladocerans and CPUE of the icefish Neosalanx pseudotaihuensis in Xujiahe Reservoir were undertaken during the period from June 1995 to December 1997. Results show that the numbers of large cladocerans Leptodora kindti, Daphnia galeata and Diaphanosoma dubia were the lowest in 1995 when the icefish was most abundant, while they were more abundant in 1997 when the icefish was low in CPUE. However, Bosmina spp.were numerous in 1995 when the icefish was high in biomass. This study suggests that the icefish could exert a significant impact on zooplankton community. |
| Key words: The icefish, Cladocerans, Predation |
