EFFECT OF SEASON ON REPRODUCTION IN WEST AFRICAN DWARF BUCKS
Sikiru Adetona Olurode, Victor Olugbade Sekoni, Iskiil Oladehinde Oyenekan, Abiodun Seun Adetomiwa.
Abstract
This study was conducted to determine effects of season on some reproductive parameters of WAD bucks. Nine apparently healthy WAD bucks, aged between 18 and 24 months and weighing 8-15 Kg, were used to evaluate the effect of seasonal variations on Live-Weight (LW), Rectal Temperature (RT) and Scrotal Circumference (SC) between January and December, 2013. Semen was collected monthly by electro-ejaculation method and evaluated for spermiogram using standard techniques. Results were compared between and within groups using analysis of variance for repeated measures. Values are significant at p ˂ 0.05. Seasonal variation significantly (p ˂ 0.05) affected RT and SC except total sperm morphological abnormalities. Means for the total sperm morphological abnormalities were 7.42 ± 3.21% (late dry), 3.42 ± 0.36% (early rainy), 6.33 ± 0.33% (late rainy) and 7.25 ± 1.18% (early dry). The total morphologically abnormal spermatozoa reported for the seasonal study was 6.10%. It was thus concluded that seasons does not have significant effect on the spermiogram of WAD buck, , however, they appeared to be most fertile during the early and late rainy seasons and least potentially fertile during early and late dry seasons.
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