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Zerbini, E.Gemeda, T.Tegegne, AzageGebre-Wold, A.Franceschini, R.[Effects of work and diet on progesterone secretion, short luteal phases and ovulations without estrus in postpartum F1 crossbred dairy cows]Effects of work and diet on progesterone secretion, short luteal phases and ovulations without estrus in postpartum F1 crossbred dairy cows

Two experiments were conducted in the neotropical savannas of Carimagua, Colombia to test the hypothesis that Brahman females subjected to sustained grazing undernutrition as heifers can attain high reproductive performance as mature cows if allowed to make compensatory gains. In Experiment 1, we...


Vera, Raúl R.Ramírez, C.A.Velásquez, N.[Growth patterns and reproductive performance of grazing Brahman cows in a tropical environment]Growth patterns and reproductive performance of grazing Brahman cows in a tropical environment

Small ruminants contribute significantly to meat (and sometimes milk) production in Africa and hence in meeting the current shortfall created by the fast rising human population. Flock productivity may, however, be affected by a wide range of disease problems and reproductive wastage. The impact ...


Mukasa-Mugerwa, E.[Possible impact of disease and reproductive wastage on the productivity of tropical small ruminants: An overview]Possible impact of disease and reproductive wastage on the productivity of tropical small ruminants: An overview

Post-partum reproductive function of 50 F1 crossbred (Boran X Friesian) cows under smallholder farms around Holetta were monitored using plasma progesterone concentrations and profiles to examine Ovarian activity of cows and accuracy of estrus detection. Experimental cows were observed for signs ...


Dawo, F.Zerbini, E.[Post-partum reproductive function of F1 crossbred cows under smallholder management conditions in central highland of Ethiopia]Post-partum reproductive function of F1 crossbred cows under smallholder management conditions in central highland of Ethiopia

This study tested the hypothesis that purebred Boran (Bos indicus) cows and crossbreds of Boran and Holstein respond differently to long-term changes of feeding level in nutrient partitioning to milk and body fat stores. A total of 27 cows of these two genotypes were subjected either to a low or ...


Jenet, A.Fernández Rivera, S.Tegegne, AzageWettstein, H.R.Senn, M.Saurer, M.Langhans, W.Kreuzer, M.[Evidence for different nutrient partitioning in Boran (Bos indicus) and Boran x Holstein cows when re-allocated from low to high or from high to low feeding level]Evidence for different nutrient partitioning in Boran (Bos indicus) and Boran x Holstein cows when re-allocated from low to high or from high to low feeding level

The research was conducted at the International Livestock Research Institute's Debre Zeit Research Station in Ethiopia. Leucaena pallida 14203, Sesbania sesban 1198 and Lablab purpureus were grown, harvested and dried at the research station. Seventy individually penned Menz ewes with a mean ini...


Melaku, S.Peters, Kurt J.Tegegne, Azage[Feed intake, live weight gain and reproductive performance of Menz ewes supplemented with Lablab purpureus, graded levels of Leucaena pallida 14203 and Sesbania sesban 1198]Feed intake, live weight gain and reproductive performance of Menz ewes supplemented with Lablab purpureus, graded levels of Leucaena pallida 14203 and Sesbania sesban 1198

A study was conducted to evaluate the effect of supplementing levels of Leucaena leucocephala leaves on reproductive capacity and growth of male highland sheep (Arsi type) in Debre Zeit Research Centre. Animals were randomly allotted to one of five experimental rations. In treatment 1 (NS) animal...


Dana, N.Shenkoru, T.Tegegne, Azage[Growth rates and testicular characteristics of Ethiopian highland sheep offered chickpea haulm supplemented with incremental levels of Leucaena leucocephala leaf hay]Growth rates and testicular characteristics of Ethiopian highland sheep offered chickpea haulm supplemented with incremental levels of Leucaena leucocephala leaf hay

The major clinical diseases of crossbred dairy herds were investigated for two years in a milk shed in Addis Ababa. Animals in 38 herds were randomly selected and visited weekly. Diagnosis of diseases and causes of death were based on clinical observation. Disease conditions were categorized into...


Lema, M.Kassa, T.Tegegne, Azage[Clinically manifested major health problems of crossbred dairy herds in Urban and Periurban production systems in the central highlands of Ethiopia]Clinically manifested major health problems of crossbred dairy herds in Urban and Periurban production systems in the central highlands of Ethiopia
Autor: Abassa, K.P.

This review encompasses five chapters which, apart from the introduction, successively covers reproductive performance, prenatal losses, post-natal losses, general conclusions and recommendations. The review intends to determine the magnitude and causes of reproductive losses in sheep and goats i...


Abassa, K.P.[Reproductive losses in small ruminants in sub-Saharan Africa: A review]Reproductive losses in small ruminants in sub-Saharan Africa: A review

Conception, lambing rate and litter size were studied on data from a flock of Horro sheep in Ethiopia from 1878 to 1997. The CATMOD and GLM procedures of SAS were used for the analysis of these traits. A sire, direct additive genetic and a repeatability animal model were employed to obtain estim...


Abegaz, S.Duguma, G.Negussie, E.Gelmesa, U.Terefe, F.Rege, J.E.O.[Factors affecting reproductive performance and estimates of genetic parameters of litter size in Horro sheep]Factors affecting reproductive performance and estimates of genetic parameters of litter size in Horro sheep

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