Chinese Journal of Fisheries ›› 2015, Vol. 28 ›› Issue (1): 34-38.
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Abstract: Juvenile skin carp Hemibarbus labeo with body weight of 148.03±0.28g was reared in net cages of each 6 m×12 m×3.5 m disposed in a reservoir at a rate of 1500 individuals per cage and fed 5 iso-protein and lipid diet containing various carbohydrate levels (25.3%, 29.2%, 33.3%, 37.1%, and 41.6%) with triplication at water temperature of 21.6℃ for 60 days. It was found that survival was not significantly affected by the dietary carbohydrate levels (P>0.05). However, the daily weight gain and specific growth rate were shown to increase first and then to decrease as the dietary carbohydrate level was increased, significantly lower final body weight of the fish in the 41.6% dietary carbohydrate group that that in 29.2%, 33.3% and 37.1% dietary carbohydrate groups (P<0.05), without significant difference between 41.6% dietary carbohydrate group and 25. 3% dietary carbohydrate group (P>0.05). There were no significant differences in feed conversion rate and protein efficiency in 33.3%, 37.1%, and 41.6% dietary carbohydrate groups (P>0.05), but significant differences between 25.3% dietary carbohydrate group and 29.2% dietary carbohydrate group, indicating that dietary carbohydrate level of 33.3%~37.1% is the optimal for growth and feed utilization of skin carp juveniles.
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