其他摘要：ABSTRACT This study was aimed to evaluate the utilisation of biofloc meal collected from biofloc-based catfish intensive culture as a mix ingredient for Nile tilapia Oreochromis niloticus and common carp Cyprinus carpio diet. A control diet containing 29.03% crude protein was used in this experiment. Experimental diet was made by mixing 30% biofloc waste meal with the control diet and repelleted after the addition of 2% of binder. To determine the experimental feed digestibility, 0.5% of Cr 2 O 3 was added as a marker for digestibility. The feed was offered to satiation at a frequency of 3 times a day for 28 days of experimentation. Nile tilapia and common carp juveniles with an initial average body weight of 11.72±0.04 g and 8.81±0.04 g, respectively, were used as the experimental animals. Each fish species were randomly stocked with a density of 10 fish/aquarium (30´45´30 cm 3 ). The results showed that dry matter digestibility of diets with 30 % biofloc waste meal in both fish species were significantly lower than those of the controls (P<0.05). However, protein, lipid and phosphorus digestibilities of diets containing biofloc waste meal were significantly higher than those of the controls (P<0.05). Feeding with biofloc waste meal mixed feed to tilapia resulted in lower growth rate compared to that to fed control feed. On the other hand, similar treatment to common carp resulted in comparable growth rate to the control treatment.
