Sinh trưởng, hiệu quả sử dụng thức ăn và thành phần sinh hóa của cá chim (<i>Trachinotus blochii</i>) cho ăn thức ăn có bổ sung protein thủy phân cá ngừ

Abstract

    A feeding trial was conducted to evaluate the effects of dietary viscera tuna hydrolysate (VTH) inclusion in diets on growth performance, feed efficiency and proximate composition of juvenile snubnose pompano. Five isonitrogenous (crude protein 46.5 %, lipid 10 %) diets were formulated in which VTH were added at levels of 0 (control), 3, 6, 9 and 12 %. Juvenile pompano (mean weight 5.48g/fish) was randomly distributed into 15 fiberglass tanks and fed to satiation in eight weeks. The results showed that the final body weight and specific growth rate were highest in fish fed diets containing 6% of tuna hydrolysate. There was no significant difference in survival rate among treatments. Increasing the supplemental levels of VTH from 0 to 12% did not significantly affect on crude protein, crude lipid and ash contents in the whole-body of pompano. There were no significant differences on haematological and biochemical parameters of juvenile pompano among treatment, except total protein showed significantly lower in fish fed diet containing 9% VTH compared to that in the control group. In conclusion, the optimum VTH in diet for juvenile pompano was 6% for maximum growth performances.

Keywords: snubnose pompano, fish protein hydrolysate, fishmeal