Oxidative status and semen characteristics of rabbit buck as affected by dietary vitamin E, C and n-3 fatty acids
2003
Castellini, C. ((Universita degli Studi di Perugia (Italie). Dipartimento di Scienze Zootecniche)) | Lattaioli, P. | Dal Bosco, A. | Minelli, A. | Mugnai, C.
The aim of this study was to investigate the effect of dietary supplementation of long chain fatty acids (C /= 20 LCP) of the n-3 series, vitamin E and vitamin C on the antioxidant capacity of rabbit buck and on semen characteristics. Fifty male rabbits at 30 days were randomly assigned to five different diets: Control (50 mg/kg diet (alpha-tocopheryl acetate), Vitamin E (200 mg/kg diet alpha-tocopheryl acetate), n-3 (2 percent ROPUFA oil + 50 mg/kg diet (alpha-tocopheryl acetate), n-3 + E (2 percent ROPUFA oil + 200 mg/kg diet (alpha-tocopheryl acetate) and n-3 + E C (2 percent ROPUFA oil + 200 mg/kg diet alpha-tocopheryl acetate + 0.5 g/L vitamin C in the drinking water). The levels of vitamins E and C and reactive oxygen metabolites (ROMs) in the blood plasma were evaluated at different ages. The antioxidant capacity and ROMs of seminal plasma, the fatty acid profile of sperm phospholipids, the semen traits and the oxidative processes during storage (24 h at + 4 degrees C) were carried out weekly for 5 wk starting from the 5. month of age. Vitamin E addition showed enough anti-oxidant protection only when associated with no lipid enriched diets. The n-3 supplementation modified the fatty acid profile of the spermatozoa membrane and simultaneously enhanced oxidative processes. Only the association with supranutritional levels of vitamins E and C inhibited the oxidative processes and improved the characteristics of fresh and stored rabbit semen
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