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| The content of ascorbic acid and tocopherol in the tissues and eggs of wild Macrobrachium rosenbergii during maturation |  |
| Cavalli, R.O.; Tamtin, M.; Lavens, P.; Sorgeloos, P.; Nelis, H.J.; De Leenheer, A.P. (2001). The content of ascorbic acid and tocopherol in the tissues and eggs of wild Macrobrachium rosenbergii during maturation J. Shellfish Res. 20(3): 939-943 |
| In: Journal of Shellfish Research. National Shellfisheries Association: Duxbury. ISSN 0730-8000, meer |
| Ook gepubliceerd als |
- Cavalli, R.O.; Tamtin, M.; Lavens, P.; Sorgeloos, P.; Nelis, H.J.; De Leenheer, A.P. (2001). The content of ascorbic acid and tocopherol in the tissues and eggs of wild Macrobrachium rosenbergii during maturation, in: (2001). VLIZ Coll. Rep. 31(2001). VLIZ Collected Reprints: Marine and Coastal Research in Flanders, 31: pp. chapter 10 [Subsequent publication], meer
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| Trefwoorden |
Animal reproductive organs; Anti-oxidanten; Biological development; Chemische samenstelling; Dierenvoeding; Diëten; Eieren; Eierstokken; Females; Gonaden; Natuurlijke Populatie; Prawn culture; Sexuele maturiteit; Sexuele reproductie; Tissues; Vitamine C; Vitamine E; Vitamines; Macrobrachium rosenbergii [WoRMS]; Brak water; Zoet water |
| Author keywords |
ascorbic acid; tocopherols; Macrobrachium rosenbergii; wild; reproduction; nutrition |
| Abstract |
Variations in the concentrations of ascorbic acid (AA) and tocopherols in association with the gonadal development of the freshwater prawn Macrobrachium rosenbergii were investigated in females captured in the Mae Klong River, Thailand. Mean ovarian AA levels ranged from 210 to 540 µg/g dry weight (dw) and were at least 11-fold higher than midgut gland (MG) levels. Variations in ovarian AA levels are believed to be related to the biosynthesis of steroid hormones, the formation of collagen, and the deposition of egg yolk compounds. alpha-Tocopherol (alpha-T) was the predominant form of vitamin E in prawn tissues and eggs. The level of alpha-T in the MG was constant, whereas in the ovaries, it ranged from 143 to 425 µg/g dw. The incorporation of a-T into the ovary was highly correlated (r² = 0.87) to ovarian lipid levels, which probably reflects the role of this vitamin as a major antioxidant agent. The present results provide further evidence of the essentiality of these vitamins in crustacean reproduction. |
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