Effect of vitamin C levels on growth, feed conversion ratio and survival rate of yellow mystus (Mystus nemurus)
1996
Phromkunthong, W. (Prince of Songkla Univ., Songkhla (Thailand). Faculty of Natural Resources. Dept. of Aquatic Science)
Study was conducted to test the efficacy of vitamin C levels on growth, feed conversion ratio and survival rate of yellow mystus (Mystus nemurus) with an initial average weight of 1.25 g. The experiment was conducted in glass aquaria with capacity of 1001 each with seven treatments having three replicates each. Fish in treatment 1 were fed a basal diet without vitamin C supplementation, whereas fish in treatment 2, 3, 4, 5, 6 and 7 were fed with basal diet supplemented with 50, 100, 200, 500, 1,000 and 2,000 mg/kg vitamin C, resppectively. After 10 week, the yellow mystus fed a basal diet supplemented with 1,000 mg/kg vitamin C recorded the best growth and feed conversion ratio. However, it did not show a significant difference among fish fed a basal diets supplemented with 500 and 2,000 mg/kg vitamin C. Survival rates of fish did not show significant differences among treatments (87-97 percent). It can be concluded that a minimum level of 500 mg/kg vitamin C is to be supplemented in the practical diet of yellow mystus.
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