Effect of season and supplementation on libido of Horro (Zebu) bulls in sub-humid environment at Bako Research Center in Ethiopia
2004
Mulugeta Kebede | J.P.C. Greyling | L.M.J. Schwalbach
A total of 16 mature Horro (zebu) bulls with average age of 6 years and body weight of 211 kg were used in this study. Eight of the bulls were supplemented and eight were used as control. The bulls were tested every 14 days with the aid of teaser cows in which oestrus had been induced. Each bull to be tested was released in a pen of 10 m by 20 m for period of r minutes with a cow in oestrus. Supplementation had no evident effect on libido, but a seasonal trend was detected in both groups. The libido score during the wet season (May-August) is relatively better than the one recorded during the dry season (October-January). The low libido score during the dry season may be attributed to the high temperature experienced at the study site and libido may be depressed because of high temperature.
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