Combined effect of DHA and α-tocopherol enrichment on sperm quality and fertility in the turkey
2006
Zaniboni, L. | Rizzi, R. | Cerolini, S.
The aim of the present study was to characterize the dietary effects of n - 3 LC-PUFA and α-tocopheryl acetate (vE) on the quality, phospholipid fatty acid composition, α-tocopherol content (α-T) and in vitro susceptibility to lipid peroxidation in turkey semen. Fertility of fresh semen was also evaluated. Male turkeys were randomly divided and fed either a control diet or a fish oil and vE rich diet (FO diet) from 40 to 60 weeks of age. The FO diet increased the proportion of n - 3 fatty acids in spermatozoa and as a consequence the (n - 3)/(n - 6) ratio also increased. These changes did not affect the proportion of n - 9 PUFAs, particularly of C22:3n - 9, in semen. The sperm content of α-T was dependent by the dietary supplementation of the vitamin and the sperm content was more than doubled supplying 120 mg kg-1 of feed to the males compared to the 60 mg kg-1 of feed in the control diet. In agreement with the major content of α-T in spermatozoa collected from the FO group were significantly less susceptible to in vitro induced oxidation. The reproductive capacity of the male breeders was not affected by the diet; however the result is considered of some relevance for field conditions where even very small changes have economic interest being applied to large bird population.
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