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Abstract
This study was carried out to evaluate the effects of dietary vitamin C on growth, survival rate and coefficient of variation (CV) of Monopterus albus from 15 (the end of the yolk-sac stage) to 60 days. The initial weight and length of fish were 0.028 ± 0.0006g and 2.72 ± 0.042cm, respectively. Eel were fed three times per day (6am, 12pm và 17pm). Four treatments were designed with 4 different dietary vitamin C levels (80mg/kg; 100mg/kg; 120mg/kg or 140mg/kg) and control treatment–dietary without vitamin C. Each feeding treatment was run triplicates, cultured tank at stocking density of 100 eels/tank. As a result, the highest growth rate was obtained at 140mg/kg treatment with the final length and weight were 9.8 ± 1.3cm/individual and 0.505 ± 0.199g/individual, respectively and had no statistically significant difference between treatments that had supplemented vitamin C, but had significant difference compared with control treatment–dietary without vitamin C. The high survival rate (97%) and coefficient of variation were achieved at 140mg/kg treatment.
Key words: eel, vitamin C, survival rate, growth, Monopterus albus