Discriminant success above bean-shape stage ( 12d~ 14d) of lapillus is over 80.08% and the test success is over 72.13%. 微耳石在豆形阶段(12d~14d)后,判别成功率达到80.08%以上,检验成功率达到72.13%以上。
The discriminant success are 84.78%, 70.81%, 78.47%, 82.39%, 96.03% and 98.01% respectively by lapillus. 以微耳石来判别时,各期判别成功率分别为84.78%、70.81%、78.47%、82.39%、96.03%和98.01%。
The main results were as follows: 1 The primordium, growth core and daily increment on the lapillus of grass carp could be observed clearly under microscope. 主要结果如下:1草鱼微耳石上可以观察到耳石原基、生长中心和生长轮。
Short radius and long radius of lapillus was linearly correlated. 2草鱼幼鱼耳石长半径与短半径之间呈线性关系;
Short radius of lapillus of juveniles was all in a linear correlation with the daily age, as well as body length and weigh. 四大家鱼幼鱼的微耳石短半径和日龄均呈显著的线性关系,和体长、体重也均呈显著线性关系。