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引用本文:徐东坡,范立民,刘凯,张敏莹,段金荣,施炜纲.长江徐六泾河段渔业群落结构(2005-2006年)及多样性初探.湖泊科学,2007,19(5):592-598. DOI:10.18307/2007.0515
XU Dongpo,FAN Limin,LIU Kai,ZHANG Minying,DUAN Jinrong,SHI Weigang.Preliminary study on the community structure and biodiversity of fishery resources in Xuliujing reach of Yangtze River, 2005 -2006. J. Lake Sci.2007,19(5):592-598. DOI:10.18307/2007.0515
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长江徐六泾河段渔业群落结构(2005-2006年)及多样性初探
徐东坡, 范立民, 刘凯, 张敏莹, 段金荣, 施炜纲
中国水产科学研究院淡水渔业研究中心内陆渔业生态环境和资源重点开放实验室, 无锡 214081
摘要:
根据2005-2006年间徐六泾河段进行的渔业资源调查, 初步研究了徐六泾河段渔业群落结构和多样性。调查到鱼类48种、虾类3种、蟹类2种, 分别隶属于12目20科44属, 其中江湖半洄游性渔业生物(青鱼、草鱼等)6种、江海洄游性渔业生物(刀鲚、鳗鲡等)7种、近海河口类渔业生物(斑尾复鰕虎、六带鲹等)9种, 淡水定居性渔业生物31种。相对重要指数(IR1)大于1000的种类定为优势种, 共有3种:日本沼虾、斑尾复鰕虎、鳊。多样性特征值为:Wilhm改进指数(H″)为3, Margalef指数(R″)为4.66, Pilou指数(E″)为0.76, McNaughton指数(D″)为0.22。利用生态类型、个体生物学特征、多样性指数、相对重要指数等分析了徐六泾河段的渔业群落结构及多样性现状, 表明徐六泾河段渔业群落属于河口渔业群落与淡水渔业群落交叉的类型, 相比长江其他江段, 多样性处于中等水平, 但群落结构不稳定, 有小型化趋势。
关键词:  长江徐六泾河段  群落结构  渔业多样性  优势种
DOI:10.18307/2007.0515
分类号:
基金项目:长江水生生物资源保护与管理小额基金(C-2005-04);国家科技基础条件平台项目(2005DKA30470-003)联合资助
Preliminary study on the community structure and biodiversity of fishery resources in Xuliujing reach of Yangtze River, 2005 -2006
XU Dongpo, FAN Limin, LIU Kai, ZHANG Minying, DUAN Jinrong, SHI Weigang
Key Open Laboratory of Ecological Environment and Resources of Inland Fisheries, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, P. R. China
Abstract:
Based on the fishery resources surveys in the Xuliujing reach of the Yangtze River from December, 2005 to March, 2006, and July-September, 2006, the community structure and biodiversity of fishery resources was preliminarily analyzed. The results indicated that, in this area, there were 48 species of fishes, 3 species of shrimps, and 2 species of crabs collected, which belonged to 12 orders, 20 families, 44 genera. The index of relative importance (IRI) was used in measuring ecological dominance of species to decide the role each species played in the community. The index of relative importance (IRI) above 1000 was defined as the dominant species. Only three dominant species, Macrobrachium nipponense, Synechogobius ommaturus, Parabramis pekinensis, accounted for 32.09% of the total catch in weight. Four diversity indexes, Wilhm's index(H″), Margalef’s index(R″), Pilou’s index (E″), McNaughton’s index (D″), which were calculated by weight to analyze the characteristics of species diversity of fishery communities. The value of H″ was 3, R″ was 4. 66, E″ was 0.76 and D″ was 0.22. The fishery community type in Xuliujing reach of the Yangtze River is the overlapping type of estuary fishery community and the fresh water fishery community. Compared with other sections of Yangtze River, the diversity of fishery community in Xuliujing reach of the Yangtze River is in the medium level, while the community structure is unstable, and the community has the miniaturized tendency.
Key words:  Xuliujing reach of the Yangtze River  community structure  fishery diversity  dominant species
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