长江上游圆筒吻鮈年龄与生长的研究  

AGE AND GROWTH OF RHINOGOBIO CYLINDRICUS GüNTHER IN THE UPPER REACHES OF THE YANGTZE RIVER

作　　者：王美荣[1,2] 杨少荣[1,2] 刘飞[1,2] 黎明政[1,2] 但胜国[1] 刘焕章[1] 

机构地区：[1]中国科学院水生生物研究所,水生生物多样性与保护重点实验室,武汉430072 [2]中国科学院研究生院,北京100049

出　　处：《水生生物学报》2012年第2期262-269,共8页Acta Hydrobiologica Sinica

基　　金：中国科学院知识创新工程重大项目(No.KZCK1-YW-08-01);国务院三峡工程建设委员会办公室生态环境项目(No.SX2009-019)资助

摘　　要：于2008—2010年在长江上游四川合江和重庆木洞江段共采集圆筒吻鮈样本511尾,研究了其年龄与生长特征,并提出了合理的鱼类资源保护对策。结果表明,所采集的圆筒吻鮈分6个年龄组,2—4龄居多,占95.7%;体长与鳞径为直线正相关,雌雄群体间无显著差异,表达式为L=51.28 R+37.45(r=0.85,n=397);各龄组、雌雄群体的实测体长均值和退算体长均值无明显差异(t=0.751,P>0.05);体长与体重呈幂函数关系,雌雄群体间无显著差异,表达式为W=8×10 6L3.099(r=0.97,n=397),其生长属等速增长类型;生长规律可以用von Bertalanffy方程表示,分别为:Lt=348.78[1 e 0.18(t+1.15)],Wt=603.17[1 e 0.18(t+1.15)]3.099;生长拐点处的年龄为5.12,此时的体长和体重分别为236.23 mm和180.33 g;圆筒吻鮈个体出现小型化现象;根据研究,长江上游圆筒吻鮈处于不合理的开发状态,应限制捕捞、加强保护。Rhinogobio cylindricus Günther is a cyprinid fish endemic to the upper reaches of the Yangtze River.The upper Yangtze River basin is experiencing critical changes to its ecosystem through multiple ecological threats in recent years,especially the impoundment of the Three Gorges Reservoir.R.cylindricus is a rheophilics species requiring diverse habitats to fulfill its life cycle.Otherwise the habitat once changed,life of R.cylindricus would be deeply affected.Therefore the study of age and growth,using scale,which is a basic and important aspect of fish biology and ecology,was essential to find out the growth characteristic of R.cylindricus after filling.The purpose of this study was to determine age structure and growth characteristics of R.cylindricus,and to propose reasonable measures to manage and protect this species.A total of 511 samples of R.cylindricus were collected from the upper reaches of the Yangtze River in Hejiang of Sichuan and Mudong of Chongqing from 2008 to 2010.The results showed that there were 6 age groups of our collected samples,and most individuals were 2—4 year-old accounting for about 95.7 percent of the total.According to the comparison of coefficient among linear function,exponential function,polynomial function and power function,and the relationship between body length（L） and scale radius（R） showed no significant difference between females and males,which could be expressed as L=51.28R＋37.45（r = 0.85,n = 397）.And there was no significant difference between measured body length and back-calculated body length at each age group between females and males（t = 0.751,P 0.05）.Meanwhile,the relationship between body length（L） and body weight（W） showed no significant difference between females and males,and could be expressed as W= 8×10 6L3.099（r = 0.97,n = 397）.Von Bertalanffy growth function was Lt= 348.78 [1 e 0.18（t ＋1.15）] and Wt = 603.17 [1 e 0.18（t ＋1.15）]3.099.In addition,the age at the inflection point of body weight growth was 5.12 year

关 键 词：圆筒吻鮈 长江上游 年龄 生长 

分 类 号：Q958.8[生物学—动物学]