Crossbreeding parameters for milk production and reproductive traits and for cow live weight (LW) of crosses of Ayrshire (A), Brown Swiss (B), Friesian (F) and Sahiwal (S) cattle were estimated using data from a dairy herd in the lowland coastal tropics of Kenya. An individual animal model was fi...
Kahi, A.K.
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Thorpe, W.R.
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Nitter, G.
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Baker, R.L.
,
[Crossbreeding for dairy production in the lowland tropics of Kenya. I. Estimation of individual crossbreeding effects on milk production and reproductive traits and on cow live weight]
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Crossbreeding for dairy production in the lowland tropics of Kenya. I. Estimation of individual crossbreeding effects on milk production and reproductive traits and on cow live weight
Forty pregnant crossbred cows (20 Holstein-Friesian X Boran and 20 Simmental X Boran) were assigned to a 2x2 (work X diet) factorial experiment as follows: supplemented-non-working (SNW), supplemented-working (SW), non-supplemented-non-working (NSNW) and non-supplemented-working (NSW). Working co...
Zerbini, E.
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Gemeda, T.
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Franceschini, R.
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Sherington, J.
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Gebre-Wold, A.
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[Reproductive performance of F1 crossbred dairy cows used for draught: Effect of work and diet supplementation]
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Reproductive performance of F1 crossbred dairy cows used for draught: Effect of work and diet supplementation
This study examined whether a prolonged anoestrus had any long-term effect on subsequent fertility of cows and estimated the relationship between repletion and resumption of reproductive activity. Twelve low body-condition, non-milking, non-cycling (depletion state) F1 crossbred dairy cows (Fries...
Zerbini, E.
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Gebre-Wold, A.
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Gemeda, T.
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[Effect of dietary repletion on reproductive activity in cows after a long anoestrous period]
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Effect of dietary repletion on reproductive activity in cows after a long anoestrous period
Small East African Zebu cows which calved during the dry season were used to determine the effects of postpartum nutritional supplementation and suckling intensity on body weight, body condition score, reproductive performance and on calf mortality and preweaning growth performance. Cows were all...
Tegegne, Azage
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Entwistle, K.W.
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Mukasa-Mugerwa, E.
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[Effects of supplementary feeding and suckling intensity on postpartum reproductive performance of small East African Zebu cows]
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Effects of supplementary feeding and suckling intensity on postpartum reproductive performance of small East African Zebu cows
The reproduction of Gudali and Wakwa cattle are investigated. Reproduction data on Gudali and Wakwa cattle on Adamawa Plateau from 1967 to 1988 were analysed. Age at first calving was not affected by breed, year of birth and season of calving (P>.05). Mean calving interval (536.9 ± 17.3 days) wa...
Mbah, D.A.
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Abassa, P.K.
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Zamba, P.
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Tawah, L.C.
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Messine, O.
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Oumate, H.
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[Factors affecting the reproductive performance of zebu cattle on the Adamawa Plateau]
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Factors affecting the reproductive performance of zebu cattle on the Adamawa Plateau
Ewe reproduction and productivity were studied in the highlands of Ethiopia in Horro and Menz ewes mated to lamb in both the wet and dry seasons from June 1992 to May 1997. The data included a total of 4890 mating records of which 2516 were Menz ewes and 2374 Horro ewes, with 2360 matings in the ...
Mukasa-Mugerwa, E.
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Anindo, D.O.
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Sovani, S.
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Lahlou-Kassi, A.
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Tembely, S.
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Rege, J.E.O.
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Baker, R.L.
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[Reproductive performance and productivity of Menz and Horro sheep lambing in the wet and dry seasons in the highlands of Ethiopia]
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Reproductive performance and productivity of Menz and Horro sheep lambing in the wet and dry seasons in the highlands of Ethiopia
Weaner ewe lambs (92 + 4 days, SD) of the Ethiopian Menz breed (n=115) were used to assess the impact of level of nutrition before and after first lambing on subsequent productivity. Lambs were raised either on pasture grazing only (P) or grazing with low (L), medium (M) or high (H) levels of a c...
Mukasa-Mugerwa, E.
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Negussie, A.
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Said, A.N.
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[Effect of post-weaning level of nutrition on the early reproductive performance and productivity indices of Menz sheep]
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Effect of post-weaning level of nutrition on the early reproductive performance and productivity indices of Menz sheep
This study was undertaken using 48 mature Menz ewes (3-6 years of age) and averaging 31.5 (standard deviation (SD)=4.9) kg body weight, to evaluate oestrus synchronization, conception and lambing rates after ram introduction following a period of isolation (n=24) or constant exposure to vasectomi...
Mukasa-Mugerwa, E.
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Sovani, S.
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Toe, F.
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Lahlou-Kassi, A.
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[Reproductive responses associated with ram introduction in mature tropical Menz ewes after a period of isolation]
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Reproductive responses associated with ram introduction in mature tropical Menz ewes after a period of isolation
Individual and herd performances of goats were monitored in nine communal areas in Zimbabwe, which are representative of the various traditionally managed production systems. Between 1 September 1990 and 1 November 1991, 6950 goats from 254 farms were monitored twice monthly on an individual basi...
Monicat, F.
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Keravec, J.
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Borne, P.M.
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[Reproductive prefomance of goats in traditional livestock systems in communal areas in Zimbabwe]
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Reproductive prefomance of goats in traditional livestock systems in communal areas in Zimbabwe
Ewe reproduction, productivity and lamb mortality were studied in grazing Horro and Menz ewes treated with FGA intravaginal sponges in the wet or dry season to compare the performance of the two indigenous Ethiopian highland breeds. There was a significant (p<0.001) difference in fertility rate (...
Asmamaw, B.R.
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[Comparison of reproductive performance, mortality rate and productivity of Menz and Horro sheep breeds of Ethiopia]
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Comparison of reproductive performance, mortality rate and productivity of Menz and Horro sheep breeds of Ethiopia