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Year : 2014
Tome : 165
Volume : 7-8
Pages : 240-244
Title : Induction of oestrus in Nigerian Ouda ewes with different oestrus synchrony protocols
Authors : B. O. OMONTESE, P. I. REKWOT, J. S. RWUAAN, I. U. ATE AND H. J. MAKUN
Summary : The objective of this study was to evaluate different protocols of oestrus synchronization in Ouda ewes (OE) using fluorogestone acetate pessaries (FGA-45), Eazi-Breed? controlled internal drug release device (CIDR) and prostaglandin (PGF2α). Thirty ewes were equally allocated randomly into 5 groups: ewes treated with FGA-45 (OFG), FGA-45 plus PGF2α (OFGPG), CIDR (OCD), CIDR plus PGF2α (OCDPG) and PGF2α (OPG). Ewes were grouped with sexually active rams. There was 100 % synchronization of oestrus in all groups. Time interval to the onset and duration of oestrus did not differ between groups (p<0.05). There was significant effect (P<0.05) in the period of the day (70 %) during which onset of oestrus was observed in the morning (a.m.) in contrast to 30 % observation for the p.m. periods, respectively. A 100 % conception rate was recorded 17-21 days post mating by measurement of non-return rates of oestrus. It was concluded that intravaginal progestagens and/or prostaglandin were equally efficient protocols for induction of oestrus in Nigerian Ouda ewes; however, the choice of either agent or protocol to be used would depend on economic considerations, access to the hormones and individual preference.
Keywords : Oestrus response, progestin, PGF2α, Ouda ewes, conception
Correspondence : B. O. OMONTESE
Adress : Department of Theriogenology and Production, Faculty of Veterinary Medicine, Ahmadu Bello University, Zaria, Nigeria. drbobwealth@hotmail.com
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