Effects of dietary vitamin C on growth, survival rate and coefficient of variation of swamp eel (Monopterus albus Zuiew, 1793) from 15 to 60 days
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.
