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Phenotypeic and genetic trends of calving interval (CI), nine months corrected weaning weight (9MOWT) and calf weight, weaned/cow/year (cow index), were estimated on data from three ranches (Mogwooni, Galana and Oljorai) located in semi arid areas of Kenya. The number of records per herd varied b...


Okeyo Mwai, AllyMosi, R.O.Rege, J.E.O.Shibre, M.[Phenotypic and genetic trends of reproductive post-weaning growth: Cow productive traits in Kenyan Boran cattle]Phenotypic and genetic trends of reproductive post-weaning growth: Cow productive traits in Kenyan Boran cattle

The reproductive performance of sheep and goats on backyard farms was studied in selected areas of southern Ghana. Out of 80 farms surveyed, 16 (20 percent) kept only goats while 38 (47.5 percent) kept only sheep; 26 (32.5 percent) had both species. Around 93 percent of the backyard farmers had 2...


Awotwi, E.K.Fynn, K.E.[Reproductive performance of sheep and goats on backyard farms in southern Ghana]Reproductive performance of sheep and goats on backyard farms in southern Ghana

A study was carried out to investigate the reproductive management and reproductive performance of dairy herds in the intensively managed urban and peri-urban dairy production systems of the Addis Ababa milk shed between September 1997 and January 1998. Fifteen dairy farms from intra-urban, 20 ...


Mekasha, YosephTegegne, AzageYami, A.Umunna, N.N.[Reproductive management and reproductive performance of dairy herds in urban and peri-urban dairy production systems in Addis Ababa milk shed]Reproductive management and reproductive performance of dairy herds in urban and peri-urban dairy production systems in Addis Ababa milk shed

The effect of levels of upgrading of indigenous Ethiopian cows on the reproductive performance and herd life of crossbreds with different levels (50, 75, and 87.5%) of European inheritance were evaluated. Genetic and non genetic factors affecting herd life and reproductive performance traits such...


Negussie, E.Brannang, E.Rottmann, O.J.[Reproductive performance and herd life of crossbred dairy cattle with different levels of European inheritance in Ethiopia]Reproductive performance and herd life of crossbred dairy cattle with different levels of European inheritance in Ethiopia

The milk and meat productivity of Ethiopia's 27 million cattle is still low for the human population of 53 million, which grows at 2.9 percent yr and is expected to surpass 65 million at the end of this century. The present cattle population includes 40 percent (10.8 million) cows of breeding age...


Mukasa-Mugerwa, E.Tegegne, Azage[Reproductive performance in Ethiopian Zebu (Bos indicus) cattle: Constraints and impact on production]Reproductive performance in Ethiopian Zebu (Bos indicus) cattle: Constraints and impact on production
Autor: Tembely, S.

Sheep and goats are a major source of income (cash) and food protein for rural farmers in most part of the tropics. In spite of the numerical importance of small ruminants in Ethiopia, their productivity is still low due to poor management, diseases and indaequate nutrition. Direct and indirect l...


Tembely, S.[Small ruminant production in Ethiopia: Prospects for improving productivity]Small ruminant production in Ethiopia: Prospects for improving productivity

To test the feasibility of the use of dairy cows for draft the International Livestock Research Institute (ILRI) and the Institute of Agricultural Research (IAR) in Ethiopia have studied a herd of F1 Friesien x Boran crossbred cows on-station over three years together with on-farm experiments an...


Zerbini, E.Gebre-Wold, A.Shapiro, Barry I.[The potential of cow traction in the East African highlands]The potential of cow traction in the East African highlands

The paper gives an example of the use of survival analysis to examine time to conception for a breed by nutrition factorial experiment and the relationship between time to conception and body weight. The example is made complicated by confounding between the treatments and the weight of animals a...


Sherington, J.Tegegne, Azage[Use of survival analysis methods with cattle reproductive performance data]Use of survival analysis methods with cattle reproductive performance data

Although the importance of bull reproduction in enhancing genetic progress and influencing cow herd fertility has long been recognized in many parts of the world, there has been very little attention paid to bulls in Ethiopia. Proper management of young bulls aims to improve growth rate so that t...


Tegegne, AzageKassa, T.Mukasa-Mugerwa, E.[Aspects of bull reproduction with emphasis on cattle in Ethiopia. I. Sexual Development and onset of puberty]Aspects of bull reproduction with emphasis on cattle in Ethiopia. I. Sexual Development and onset of puberty

Postpartum body weight dynamics of zebu and crossbred cows in relation to postpartum reproduction was studied using data from the Bako Agricultural Research Centre. Body weight at calving, first postpartum oestrus, first service and conception were analysed using the General Linear Model which in...


Gebreyohannes, G.Tegegne, AzageDiedhiou, M.L.Hegde, B.P.[Body weight dynamics of Zebu and crossbred cows in relation to postpartum reproduction under sub humid climate of Bako]Body weight dynamics of Zebu and crossbred cows in relation to postpartum reproduction under sub humid climate of Bako

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