Effects of Dietary vitamin-C on Biochemical and Morphometric parameters of Labeo rohita

The major carp, Labeo rohita fed with six different diets having vitamin C fortification. The Halver's synthetic diet (H440) was supplemented with graded levels of vitamin C at 0, 250, 500, 600, 750 and 1000 mg/kg. In present investigation, Labeo rohita fed with 600 mg/kg vitamin C, gain maximum ash (4.16%), carbohydrate (2.94%) protein (16.87%), fat (5.09 %), SGR (2.92 %), survival rate (100 %) with least moisture content (77.10 %) as compared to control and other graded level of vitamin C. Supplementation of vitamin C beyond 600 mg resulted in decrease in protein, fat, carbohydrate and ash values with an increase in moisture content. The results also indicated that Halver's synthetic diet of fish without dietary vitamin C had lower weight gain (WG) and specific growth rate (SGR) than those fed the diets supplemented vitamin C. WG and SGR did increase with dietary vitamin C levels increasing from 250 mg/ kg to 600 mg / kg. However, no significant increase was observed with further increase in dietary vitamin C levels beyond 600 mg / kg.