A Preliminary Study on Juvenile Growth Performance of Kaluga(Huso dauricus)Hybrid Under Artificial Farming Conditions

In order to understand the growth characteristics of Kaluga hybrid {[(Kaluga♀×Amur sturgeon♂) natural hybrid♀]×Kaluga♂} under artificial farming conditions,experiments were conducted on the juvenile growth of Kaluga body weight and length.Through processing data of growth by Excel and SPSS software,the results showed that the juveniles reached a mean body weight(MBW) of 437.36 g and a mean total body length(BTL) of 48.76 cm after 75 days rearing from a mean body weight of 45.83 g and a mean total body length of 33.32 cm,when they were 139 days old.We found that there is a linear relationship between the total length and days old in the form of L=3.292 7t+30.517, R2=0.959 4,and there is a power function relationship: Wgc=119.74e0.234 6t,R2=0.956,between body weight and days old,and the total length-weight relationship is WwL=0.005 6L2.892 9,R2=0.998 2.The power is close to 3,which shows that weight is related to the cube of the length and growth is isometric of hybrid juvenile.The total body length increased at 2.06 mm on average for the hybrid juvenilesand the instantaneous growth ratio was 0.076 3,and the body weight was gained at the rate of 3.887 1 g per day on average and the instantaneous growth ratio was 0.219 7.