尼洋河双须叶须鱼年龄与生长特性研究  

Study on the Age and Growth Caracteristics of Ptychobarbus dipogon in Niyang River

作　　者：王强[1,2] 王旭歌[3] 朱龙[1] 吴青[1] 朱成科[1] 

机构地区：[1]西南大学荣昌校区水产系,重庆402460 [2]重庆市璧山区养殖服务中心,重庆402760 [3]中国水产科学院长江水产研究所,武汉430223

出　　处：《湖北农业科学》2017年第6期1099-1102,共4页Hubei Agricultural Sciences

基　　金：农业部公益性行业科研专项(201403012);"十二五"国家科技支撑计划项目(2012BAD25B10);重庆市应用开发计划项目(cstc2014yykf C80001)

摘　　要：利用2014-2015年在尼洋河收集的203尾双须叶须鱼(Ptychobarbus dipogon)样本,以鳞片为主要的年龄鉴定材料,对尼洋河双须叶须鱼种群进行了年龄结构和生长特性的研究。结果表明,尼洋河双须叶须鱼种群由2~15龄和18龄共15个年龄组成。其中优势年龄为2~10龄(占87.19%)。体重和体长的关系方程为W=1.44×10^(-4)L^(2.537)(n=203,R^2=0.876,P<0.01)。其生长可用Von Bertalanffy生长方程表示为L_t=489.938[1-e^(-0.119(t+1.245))];W_t=1 202.529[1-e^(-0.119(t+1.245))]^(2.573)。生长拐点位置在t=6.697龄,对应的体长和体重为L=299.578 mm,W=399.028 g。双须叶须鱼生长较慢、体型较小,是对尼洋河生态与环境适应的结果 。A total of 203 samples of Ptychobarbus dipogon were collected from Niyang River,Tibet,in 2014-2015,in order to reveal the age and growth characteristics. The results indicated that scales of P. dipogon could be used to identify its age. There were 15 age classes ranging 2 to 15 in the population,with preponderant age classes of 2~10 years old,accounting for 87.19% of the total population. The relationship between body weight and body length was described by the linear equation, W=1.44×10-4L2.537（n=203,R2=0.876,P〈0.01）. The Von Bertalanffy growth function was Lt=489.938[1-e-0.119（t＋1.245）],Wt=1202.529 [1-e-0.119（t＋1.245）]2.573. The growth inflexion point of the body weight was 6.697 years with a body lenght of 299.578 mm and 399.028 g.

关 键 词：双须叶须鱼(Ptychobarbus dipogon) 年龄 生长 尼洋河 

分 类 号：S917.4[农业科学—水产科学]