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Five tropically adapted buck breeds extensively managed in Ethiopia were studied to determine possible effects of breed and age on body size and testicular traits. In all, 177 bucks were selected following stratified random sampling, and evaluated in three age groups: <14 months (young), 14-19.5 ...


Mekasha, YosephTegegne, AzageAbera, A.Rodríguez Martinez, H.[Body size and testicular traits of tropically-adapted bucks raised under extensive husbandry in Ethiopia]Body size and testicular traits of tropically-adapted bucks raised under extensive husbandry in Ethiopia

Compares estrus response, estrus response interval and subsequent pregnancy rate in Bos indicus and Bos indicus X Bos taurus cross cows and heifers following estrus synchronization with prostaglandin F2 (PGF2X (a), a progesterone releasing intravaginal device (PR10) (b), and synchro-mate B (SMB) ...


Tegegne, AzageWarnick, A.C.Mukasa-Mugerwa, E.Ketema, H.[Fertility of Bos indicus and Bos indicus X Bos taurus crossbred cattle after estrus synchronization]Fertility of Bos indicus and Bos indicus X Bos taurus crossbred cattle after estrus synchronization

An experiment was conducted to determine the effects of feeding different calf starter rations, weaning age and their interactions on testicular growth and body weight of Borena Friesian (BF) crossbred bull calves at the age of 105 (closer to weaning) and 202 (nearly 6 months) days. Statistical a...


Gojam, Y.Tegegne, AzageGebrewold A.Bekele, T.[The effect of weaning age and feeding of different calf starter rations on testicular growth and body weight of Borena-Friesian crossbred bull calves]The effect of weaning age and feeding of different calf starter rations on testicular growth and body weight of Borena-Friesian crossbred bull calves

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

Measurements on testis and linear body size, scrotal circumference (SC), testis diameter (TD) hearth girth (HG), height at wither (HTW) and body length (BDL) at the age of 1, 3, 6, 9, 12, 15, 18 and 21 months was taken. Thirteen Borana Friesian (BoXF) crossbred bull calves born at Holetta Agricul...


Gojam, Y.Tegegne, AzageGebre-Wold, A.Alemayehu, M.Yilma, Z.[Testicular growth and its relationship with linear body measurements in Borana-Friesian crossbred bull calves at different ages]Testicular growth and its relationship with linear body measurements in Borana-Friesian crossbred bull calves at different ages

This paper Reports on both the individual and combined effects of age at first caving (AFC) and live weight at first calving (LWFC) for crossbred heifers (Friesian x Zebu) on first lactation Milk yield. Optimal health and nutrition management was followed. Fifty one heifers were allocated to youn...


Kebede, B.McCrabb, G.J.Tegegne, AzageYimegnuhal, A.Urge, M.[Effect of age and live weight at first calving on milk yield of crossbred (Friesian x Zebu) heifers on first lactation]Effect of age and live weight at first calving on milk yield of crossbred (Friesian x Zebu) heifers on first lactation

The efficiency of cattle breeding and production depends to a large extent on the reproductive performance of the herd, with the bull playing a major role. Large differences in fertilizing ability between bulls exists, and such differences are due to the characteristics of individual bulls rather...


Tegegne, AzageKassa, T.Mukasa-Mugerwa, E.[Aspects of bull reproduction with emphasis on cattle in Ethiopia. II. Sperm production capacity and semen characteristics]Aspects of bull reproduction with emphasis on cattle in Ethiopia. II. Sperm production capacity and semen characteristics

A total of 179 heifers, primiparous and multiparous Boran cows were assigned to four breeding units and mated over a 4 - month breeidng season in a single-sire mating system. Mean body weight and body condition scores at the beginning of mating ranged from 363 + 6 kg to 388 + 7 kg and from 6.7 + ...


Tegegne, AzageEntwistle, K.W.Mukasa-Mugerwa, E.[Factors affecting the reproductive performance of Boran (Bos indicus) cows in a single-sire mating system]Factors affecting the reproductive performance of Boran (Bos indicus) cows in a single-sire mating system

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