池养条件下鲶鱼苗生长的研究

在人工饲养条件下，鲍鱼苗有明显的昼夜摄食节律性，以夜间２０：００￣２３：００摄食活动最强，鱼苗间互相残杀现象严重，饥饿时尤甚，经统计分析，鲶鱼苗的生长存在着显著的个体差异，全长与日龄之间呈直线关系，体重与日龄之间呈幂函数关系，且在不同温度时回归方程不同，开口摄食前体重为负增长，鲶在鱼苗阶段就与成鱼的体型基本相似，两者无显著的差异。

GROWTH OF LARVAE OF SILURUS ASOTUS UNDER POND NURSERY

Larvae of Silurus asotus have distinct day/night feeding rhythm, with the highest feeding intensity between 20:00~23:00. Small larvae often become prey to large larvae. There are significant differences in growth speed between individuals. The relationship of total length and day number accords with a straight line while larvae weight increases exponentially with day number, and the equation varies under different water temperatures. The body shape of larvae is similar to the adult's. By the shape of tail fin and the number of beards, larvae of S. asotus can be distinguished from S.so ldatovi meridionails.