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| 张氏的年龄结构及生长特性 | |
| 引用本文： | 孙宝柱,李晋,但胜国,谭德清.张氏的年龄结构及生长特性[J].淡水渔业,2010,40(2). |
| 作者姓名： | 孙宝柱 李晋 但胜国 谭德清 |
| 作者单位： | 1. 中国科学院水生生物研究所,武汉,430072;中国科学院研究生院,北京,100049 2. 四川省泸县水利局,四川泸县,646106 3. 中国科学院水生生物研究所,武汉,430072 |
| 基金项目： | 国务院三峡工程建设委员会办公室生态环境项目，长江上游珍稀、特有鱼类及保护区措施补偿科研项目，国家自然科学基金 |
| 摘 要： | 以鳞片作为年龄鉴定材料,对长江上游特有鱼类张氏(Hemiculter tchangi Fang)种群的年龄结构和生长特性进行了研究。结果表明:张氏鳞片的年轮结构呈疏密切割型,2~3月是年轮形成最多的月份。其渔获物由1~4龄组成,其中857尾为1~2龄,占总数的83.84%;雌∶雄性比为1.07∶1,符合1∶1理论比值(X2=0.754,P>0.05,n=1001),随着年龄的增长呈雌鱼多于雄鱼的趋势。体长主要分布在81~180 mm(94.9%),体重主要分布在2.9~50.0 g(67.69%)。体长和鳞径呈直线关系,体长和体重呈幂函数关系且幂指数接近3,属于匀速生长类型,生长方程为Lt=196.05(1-e-0.36(t+1.26));Wt=97.195(1-e-0.36(t+1.26))3.145,拐点年龄为1.92龄,相应的体长体重分别为133.5 mm、29.13 g。 |
| 关 键 词： | 张氏(Hemiculter tchangi Fang) 年龄 生长 |
Age structure and growth characteristics of Hemiculter tchangi Fang |
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| SUN Bao-Zhu,LI-Jin,DAN Sheng-Guo,TAN De-Qing.Age structure and growth characteristics of Hemiculter tchangi Fang[J].Freshwater Fisheries,2010,40(2). | |
| Authors: | SUN Bao-Zhu LI-Jin DAN Sheng-Guo TAN De-Qing |
| Institution: | SUN Bao-Zhu1,2,LI-Jin3,DAN Sheng-Guo1,TAN De-Qing1(1.Institute of Hydrobiology,Chinese Academy of Sciences,Wuhan 430072,2.Graduate University of the Chinese Academy of Sciences,Beijing 100049,3.The Bureau of Water Conservancy in Luxian,Luxian County,Sichuan 646106) |
| Abstract: | Hemiculter tchangi Fang is an endemic fish in the upper Yangtze River.The age structure and growth were investigated during the present study.Individuals were collected monthly from November 2005 to February 2009 in the estuary of the Chishui River,the first-order tributary of the Yangtze River,locating at Hejiang county of Sichuan Province.Scales were removed from 1023 individuals to determine individual age.Analysis of margins suggested that new annual rings on scales were formed mainly in February and Ma... |
| Keywords: | Hemiculter tchangi Fang age growth |
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