Ảnh hưởng của việc bổ sung nhộng ruồi lính đen trong thức ăn lên tăng trưởng và độ tiêu hóa protein của cá chẽm (Lates calcarifer Bloch, 1790)

Abstract

    The objectives of this study were to evaluate the effects of the use of black soldier fly (Hermetia illucens) larvae (BSFL) as feed additive on growth performance, survival rate, and feed utilization efficiency of Asian seabass (Lates calcarifer). Seabass juveniles (average weight of 20.2 ± 0.3 g/fish) were stocked into 1.5 m³ composite tanks at a density of 30 individuals per tank and reared over a 90-day period. The commercial feed formulated to contain 44% crude protein was used. Experimental treatments included the addition of low levels of BSFL homogenate to the diets of seabass: without BSFL (T1), 0.5% BSFL (T2), 1% BSFL (T3), and 2% BSFL (T4). Feed's protein digestibility was evaluated using the indirect method with chromic oxide as an inert marker. At the end of 90 days of the fish feeding trial, the survival rate of T2 (93.3 ± 3.3%) was highest, while T3 (81.1 ± 11.7%) was lowest. The highest final weight and specific growth rate, and the lowest feed conversion ratio were recorded in treatment T3. The result showed that the average protein digestibility ranged from 85.8 to 88.2%. The differences in protein digestibility between treatments were not statistically significant (P>0.05).