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Production characteristics, covering ewe breeding data; growth of lambs and use of correction factors for parity of dam, sex and type of birth of lamb; ewe milk production as measured by early lamb growth; effects of dry season on lamb weights and ewe milk production; repeatabilities and phenotyp...


Sacker, G.D.Trail, J.C.M.[Production characteristics of a flock of East African Blackhead sheep]Production characteristics of a flock of East African Blackhead sheep

The effects of birth weight, sex, twinning, parity of dam and dry season on mortality rates of lambs were studied between births and weaning at 20 weeks in a flock of East African Blackhead sheep. The mean birth weight of non-surviving lambs was lower than those of surviving lambs. Singles from g...


Trail, J.C.M.Sacker, G.D.[Lamb mortality in a flock of East African Blackheaded sheep]Lamb mortality in a flock of East African Blackheaded sheep

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

Dorset Horn rams were used on East African Blackhead sheep in western Uganda in mutton production through improved lamb growth. The crossbred lambs were significantly heavier than the indigenous at birth. From birth to weaning at five months, the growth rates of both types were identical, being 0...


Trail, J.C.M.Sacker, G.D.[Production records of lambs from East African Blackhead ewes and Dorset Horn rams]Production records of lambs from East African Blackhead ewes and Dorset Horn rams
Fall, AbdouDiop, MouhamadouSandford, J.Wissocq, Y.J.Durkin, J.W.Trail, J.C.M.[Etude de la productivité des moutons Djallonke au CRZ de Kolda, Sénégal. I. Paramètres de reproduction et viabilité]Etude de la productivité des moutons Djallonke au CRZ de Kolda, Sénégal. I. Paramètres de reproduction et viabilité
Fall, AbdouDiop, MouhamadouSandford, J.Wissocq, Y.J.Durkin, J.W.Trail, J.C.M.[Etude de la productivité des moutons Djallonke au CRZ de Kolda, Sénégal. II. Poids corporels, productivité de brebis et des troupeaux]Etude de la productivité des moutons Djallonke au CRZ de Kolda, Sénégal. II. Poids corporels, productivité de brebis et des troupeaux

This article attempts to evaluate the current state of knowledge on questions such as, to what extent is inheritance important and how is it influenced by environmental factors; what are the mechanisms underlying increased resistance; and how productive are these breeds under various levels of ch...


Murray, M.Morrison, W. IvanMurray, P.K.Clifford, D.J.Trail, J.C.M.[Trypanotolerance - a review]Trypanotolerance - a review

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