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Comparison of l-ascorbyl-2-monophosphate-Ca with l-ascorbyl-2-monophosphate-Na/Ca on growth and tissue ascorbic acid concentrations in Korean rockfish (Sebastes schlegeli)

Authors :
Wang, Xiaojie
Kim, Kang-Woong
Bai, Sungchul C.
Source :
Aquaculture. Jul2003, Vol. 225 Issue 1-4, p387. 9p.
Publication Year :
2003

Abstract

This experiment was conducted to compare l-ascorbyl-2-monophosphate-Ca (AMP-Ca) with l-ascorbyl-2-monophosphate-Na/Ca (AMP-Na/Ca) for supplying the dietary vitamin C for juvenile Korean rockfish (Sebastes schlegeli). Fish were fed 1 of 11 semi-purified diets containing equivalent of 0, 50, 100, 200, 400, and 800 mg ascorbic acid (AA)/kg diet in the form of AMP-Ca or AMP-Na/Ca for 12 weeks. After 12 weeks of the feeding trial, weight gain (WG), feed efficiency (FE) of fish fed with the control diet (vitamin C-deficient diet) were significantly lower than those of fish fed with the vitamin C-supplemented diets in either form (P<0.05). WG of fish fed with AMP-Na/Ca 400, AMP-Na/Ca 800, AMP-Ca 400 and AMP-Ca 800 diets were significantly higher than those of fish fed with the control diet, AMP-Na/Ca 50, AMP-Ca 50 and AMP-Ca 100 diets (P<0.05). In general, there was no significant difference between AMP-Ca diets and AMP-Na/Ca diets at the same supplementation levels. By the end of the 9th week, fish fed with the control diet began to show the initial vitamin C deficiency signs such as anorexia, erratic swimming behavior, darkening in skin color and reduced growth.The ascorbic acid concentrations in fish muscle and liver increased with the increase of the vitamin C supplementation levels in fish diets regardless of which kind of vitamin C source used. There were no significant differences in ascorbic acid concentrations in liver and muscle of fish between the two vitamin C sources at the same supplementation level.These results indicate that AMP-Ca is a bioavailable form of vitamin C source for Korean rockfish and it has the antiscorbutic activity equal to AMP-Na/Ca.Broken-line analysis of weight gain indicated that the dietary vitamin C requirement of Korean rockfish was 106 mg AA/kg diet based on the pooled WG of fish fed with the AMP-Na/Ca and AMP-Ca diets. However, based on the different forms of ascorbic acid, the vitamin C requirements were 101 and 112 mg AA/kg diet with the forms of AMP-Na/Ca and AMP-Ca, respectively. [Copyright &y& Elsevier]

Subjects

Subjects :
*VITAMIN C
*SEBASTES

Details

Language :
English
ISSN :
00448486
Volume :
225
Issue :
1-4
Database :
Academic Search Index
Journal :
Aquaculture
Publication Type :
Academic Journal
Accession number :
9907194
Full Text :
https://doi.org/10.1016/S0044-8486(03)00303-X