Growth Performance and Feed Utilization of Common Lowland Frog (Rana rugulosa Wiegmann) Fed with Supplementation by Bromelain Extracted from Pineapple Feed

抄録

This study aimed to determine the effect of bromelain extracted from the crown of pineapple supplemented in diet on growth performance and feed utilization of common lowland frog. Diets were isonitrogenous at 35% protein and 3,000 KcalKg^-1 supplemented at 0, 0.25, 0.5 and 1 mL bromelain extraction g^-1 of feed. Frog with an initial weight of 0.25 ± 0.1 g were fed on feed trial in triplicate groups for 120 days. The results showed that the enzyme extracts did not effect growth performance but enhancement the survival rate with all levels (P<0.05) especially at 1 mL/g feed had the highest feed utilization and protein efficiency ratio (PER). The percentage of edible flesh of 0, 0.5 and 1 mL/g feed group were higher than the 0.25 mL/g feed group. These results demonstrated that bromelain extracted supplementation of all levels improved survival rate and feed utilization and PER especially at 1 mL/g feed.