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The effects of age of ewe, and year, sex, and year, sex and type of birth of lambs on lamb weights between birth and weaning were measured and appropriate correction factors estimated in a flock of east African Blackhead sheep maintained over an 11-year period in Western Uganda. These correction ...


Trail, J.C.M.Sacker, G.D.[Factors affecting production records of lambs from a flock of East African Blackhead sheep]Factors affecting production records of lambs from a flock of East African Blackhead sheep

Presents results of a study conducted to estimate the effects of heterosis and breed on a series of maternal and individual traits; takes Boran X Ankole and Boran X Zebu as crossbred cows and Ankole, Boran and Small East African Zebu as straightbred cows; includes traits like calf crop born, prew...


Gregory, K.E.Trail, J.C.M.Marples, H.J.S.Kakonge, J.[Heterosis and breed effects on maternal and individual traits of Bos indicus breeds of cattle]Heterosis and breed effects on maternal and individual traits of Bos indicus breeds of cattle

Compares individual as well as maternal traits of different breeds of Bos indicus and Bos taurus cattle interms of cow weight at parturition, weaning and at dif. stages after parturition, calf crop, viability and weight at dif. ages.


Gregory, K.E.Trail, J.C.M.Marples, H.J.S.Kakonge, J.[Characterization of breeds of Bos indicus and Bos taurus cattle for maternal and individual traits]Characterization of breeds of Bos indicus and Bos taurus cattle for maternal and individual traits

Trypanosome infection was detected by the dark ground/phase contrast buffy coat microscopic technique in N'Dama cattle in a high natural tsetse challenge situation in Zaire. The data were used to compare the pattern of infection in very young animals and in their dams, and to evaluate how the pat...


Trail, J.C.M.Wissocq, N.M.D'Ieteren, G.D.M.Kakiese, O.Murray, M.[Patterns of Trypanosoma vivax and T. Congolense infection differ in young N'Dama cattle and their dams]Patterns of Trypanosoma vivax and T. Congolense infection differ in young N'Dama cattle and their dams

Reports the productivity levels achieved by grade Boran cattle maintained by chemoprophylaxis at Mkwaja ranch (Tanzania) from 1973 to 1982. Analyses the effects of year and season of calving on birth, cow age, calf sex and area & location of herd on performance of the environmental influences. Ev...


Trail, J.C.M.Murray, M.Sones, Keith R.Jibbo, J.M.C.Durkin, J.W.Light, D.E.[Boran cattle maintained by chemoprophylaxis under trypanosomiasis risk]Boran cattle maintained by chemoprophylaxis under trypanosomiasis risk

Presents results of an experiment conducted in southwestern Uganda to estimate heterosis, additive maternal and direct effects of the Red Poll and Boran breeds of cattle involved in a two-breed diallel design. Includes data on survival and growth traits from birth to an age of 30 months.


Trail, J.C.M.Gregory, K.E.Marples, H.J.S.Kakonge, J.[Heterosis, additive maternal and additive direct effects on the Red Poll and Boran breeds of cattle]Heterosis, additive maternal and additive direct effects on the Red Poll and Boran breeds of cattle

Reproductive performance, mortality, growth, and culling and replacement rates based on 20000 calving records were evaluated for grade Boran beef cattle maintained with trypanosomiasis risk in Tanzania. Under ranching conditions, over a 10-year period in this area of high Glossina moistens morsi...


Trail, J.C.M.Murray, M.Sones, Keith R.Jibbo, J.M.C.Durkin, J.W.Light, D.E.[Boran cattle maintained by chemoprophylaxis under trypanosomiasis risk]Boran cattle maintained by chemoprophylaxis under trypanosomiasis risk

Evaluates in detail how environmental and stress factorts affect trypanosome infection in N'Dama cows and their calves, the linkages with curative drug treatment given under the management regime prevailing, the linkages with anaemia control as measured by packed red cell volume (PCV), and the re...


Trail, J.C.M.D'Ieteren, G.D.M.Murray, M.Ordner, G.Yangari, G.Collardelle, C.Sauveroche, B.Maille, J.C.Viviani, P.[Measurement of trypanotolerance criteria and their effect on reproductive performance of N'Dama cattle]Measurement of trypanotolerance criteria and their effect on reproductive performance of N'Dama cattle

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