怀头鲇(♀)×兰州鲇(♂)杂交F_1的生长特性初步研究

A preliminary study on juvenile growth performance of F_1 hybrid between Silurus soldatovi (♀)×Silurus lanzhouensis (♂) under artificial farming conditions

对怀头鲇(♀)与兰州鲇(♂)的杂交F1人工养殖条件的生长进行研究。结果显示:在水温22￣25℃条件下,平均体长(2.75±0.16)cm、平均体重(0.36±0.06)g的杂交F1幼鱼经过100d培育后,平均体长和平均体重分别达到(28.56±3.26)cm和(193.33±59.50)g。体长与日龄呈线性关系,L=0.3131t+1.4389,R2=0.9178;体重与日龄呈指数函数关系,W=0.0159L2.7664,R2=0.9148。体重与体长呈幂函数关系,关系式为W=0.0159L2.7664,R2=0.9963,其中b值接近于3,怀头鲇和兰州鲇的杂交F1幼鱼为等速生长类型,体重生长与全长生长速度相近。

In order to understand the growth characteristics of F1 hybrid （S.soldatovi ♀×S.lanzhouersis ♂ ） under artificial farming conditions, experiments were conducted on the growth of juvenile hybrid at 22～25℃. Through processing data of growth by Excel and SPSS software, the results showed that the juveniles reached a mean body length of （28.56＋3.26） cm and a mean body weight of （193.33＋59.50） g after 100 days rearing from a mean body length of （2.75＋0.16） cm and a mean body weight of （0.36＋0.06） g. The linear relationship be- tween body length and day-age could be described as L=0.3131t＋l.4389 （R2=0.9178）,the relationship between body weigth and day-age could be descibed as W=0.0159L2.7664（R2 = 0.9148）, and the relationship between body weight and body length could be described as W=0.0159L2.7664（R2=0.9963）. The power was close to 3, which showed that the growth of weight was related to the cube of the length and growth was isometric of bybrid juve- nile.