The efficiency of L-ascorbic acid in micro bound diet for larval red sea bream (Pagrus major)
2006
Ren, T.(Kagoshima Univ. (Japan)) | Koshio, S. | Teshima, S. | Ishikawa, M. | Yokoyama, S. | Michael, F.R. | Uyan, O.
A study was conducted to determine the effect of a vitamin C (ascorbic acid, AsA) derivative, L-ascorbyl-2-monophosphate-Na/Ca (AMP-Na/Ca), on red sea bream larval performances, and tolerance against stress. Ten days old red sea breams were fed four micro bound diets (MBD) containing various AsA contents without any live food supply for 14 days. The survival rates of larvae that received diets containing 768 and 1508 mg AsA were significantly higher than those receiving AsA free diet. The total length of the larvae that received diet containing 1508 mg AsA/kg was significantly higher than larvae that received diets with 206 mg AsA/kg and AsA free. The whole body AsA contents increased with increased dietary AsA levels. In present study, a trend towards better tolerance to both low salinity and high temperature stresses in accordance with an increment of the dietary AsA level was observed. This study clearly demonstrated that red sea bream larvae required dietary vitamin C for normal development. Moreover, the present study suggested that red sea bream larvae could be cultured from the early stage with feeding only MBD containing relatively high contents of vitamin C more than 768 mg/kg diet.
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