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Title: Pellet feed improvements through vitamin C supplementation for snakehead, Channa striata (Block 1793), culture
Authors: Trần, Thị Thanh Hiền
Trần, Thị Tuyết Hoa
Phạm, Minh Đức
Trần, Minh Phú
Nguyễn, Văn Khánh
Bengtson, A. A.
Nguyen, Tuong Khanh
Keywords: Channa striata
Ascorbic acid
Immune response
Issue Date: 2018
Series/Report no.: Asian Fisheries Science;31 .- p. 191-208
Abstract: Vitamin C, or ascorbic acid (AA), is important in growth and physiological functions of fish. Six soybean meal-based (SBM) diets containing 0, 125, 250, 500, 1000 and 2000⁻¹ of AA were fed to snakehead (6.6-6.7 g) for eight weeks in the laboratory. Survival, final weight, and specific growth rate (SGR) of snakehead in the 250 and 500⁻¹ treatments were significantly greater than those in the control (0⁻¹). Feed intake (FI), feed conversion ratio (FCR), and protein efficiency ratio (PER) also differed significantly. The requirement of AA for snakehead was calculated to be 277⁻¹. No abnormal backbones were observed during the experimental period. Erythrocyte count was significantly higher at 1000 and 2000⁻¹1 than at 0 and 125⁻¹. Fish in 250⁻¹ had significantly higher leukocyte count than 0, 1000, and 2000⁻¹. A bacterial challenge test with Aeromonas hydrophila revealed that 500 and 1000⁻¹ had the lowest cumulative mortality. In an on-farm trial, SBM-based and commercial diets augmented with 0, 500, 750, or 1000⁻¹ AA were fed to C. striata for 23 weeks. Optimal results were obtained with SBM-based diets supplemented with 500⁻¹ AA, in terms of survival, yield, FCR, production cost and profit.
ISSN: 0116-6514
Appears in Collections:Tạp chí quốc tế

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