Effects of Single or Mixed Dietary Supplementation of α-Tocopherol and Ascorbic Acid on Growth Performance, Flesh Quality, Digestion Capacity of Golden Trevally (Gnathanodon speciosus)
Do-Huu Hoang *
Viet Nam Academy of Science and Technology, Institute of Oceanography, 01 Cau Da, Nha Trang, Viet Nam and Viet Nam Academy of Science and Technology, Graduate University of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam.
Phan Tan Luom
Dong Thap University, 783 Pham Huu Lau, Cao Lanh, Dong Thap, Viet Nam.
Nguyen Thi Thuy
Dong Thap University, 783 Pham Huu Lau, Cao Lanh, Dong Thap, Viet Nam.
*Author to whom correspondence should be addressed.
Abstract
This study aimed to investigate the effects of dietary vitamins E (VE) and vitamin C (VC) and the VE+VC mixture on growth performance, gut morphology, feed utilisation in golden trevally. The results indicated that supplementation with vitamins E and C had a significant growth rate of golden trevally. Fish fed a diet supplemented with VE, VC, or a mixture of VE and VC showed significantly reduced size variations compared to fish fed the basal diet. Fish receiving diets supplemented with VE or a combination of VE and VC had a larger perimeter ratio (PR) than those receiving the control diet. Feed intake was reduced in the VE + VC group. Feed conversion ratios reduced significantly in fish fed diets supplemented with vitamins E and C. Dietary vitamin supplementation significantly influences body composition of fish.
Keywords: Golden trevally, Gnathanodon speciosus, Vitamin E, Vitamin C, growth performance, Photobacterium damselae