Discusses factors affecting morbidity and mortality of the Ethiopian highland sheep both on-farm and on-station at Debre Berhan between 1989 and 1990. Primary causes of infections origin resulted in high proportional morbidity (88.4 percent on-farm) and mortality (72.9 percent on-farm and 71.8 pe...
Bekele, T.
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Wolde-Ab, T.
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Lahlou-Kassi, A.
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Sherington, J.
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[Factors affecting morbidity and mortality on-farm and on-station in the Ethiopian highland sheep]
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Factors affecting morbidity and mortality on-farm and on-station in the Ethiopian highland sheep
The paper reviews the evidence of genetic resistance to endoparasites both within and between breeds of sheep and goats and assesses the possibilities of breeding for increased resistance. In light of this evidence, ILCA has developed a Pan-African research programme to investigate and characteri...
Baker, R.L.
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Lahlou-Kassi, A.
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Rege, J.E.O.
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Reynolds, L.
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Tekelye Bekele
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Mukasa-Mugerwa, E.
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Rey, B.
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[A review of genetic resistance to endoparasites in small ruminants and an outline of ILCA's research programme in this area]
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A review of genetic resistance to endoparasites in small ruminants and an outline of ILCA's research programme in this area
A study was carried out at the International Livestock Research Institute (ILRI) Debre Berhan Research Station in Ethiopia from 1992 to 1995 to compare the peri-parturient rise (PPR) in faecal nematode egg counts (FEC) in ewes of two indigenous sheep breeds. A total of 1439 Menz and 1347 Horro ew...
Tembely, S.
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Lahlou-Kassi, A.
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Rege, J.E.O.
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Mukasa-Mugerwa, E.
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Anindo, D.O.
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Sovani, S.
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Baker, R.L.
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[Breed and season effects on the peri-parturient rise in nematode egg output in indigenous ewes in a cool tropical environment]
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Breed and season effects on the peri-parturient rise in nematode egg output in indigenous ewes in a cool tropical environment
The effects of breed (Menz and Horro), season (wet and dry), and the breed by season interaction on production and response to naturally acquired gastro-intestinal (GI) nematode parasite infections (predominantly Longistrongylus elongata and Trichostrongylus spp. and a small proportion of Haemonc...
Rege, J.E.O.
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Tembely, S.
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Mukasa-Mugerwa, E.
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Sovani, S.
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Anindo, D.O.
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Lahlou-Kassi, A.
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Nagda, S.M.
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Baker, R.L.
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[Effect of breed and season on production and response to infections with gastro-intestinal nematode parasites in sheep in the highlands of Ethiopia]
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Effect of breed and season on production and response to infections with gastro-intestinal nematode parasites in sheep in the highlands of Ethiopia
The epidemiology of nematode infections in Menz sheep was studied in the highlands of Ethiopia at the International Livestock Research Institute (ILRI), Debre Berhan Research Station, using a series of tracer lambs grazing contaminated pasture for either 4, 16, 32 or 48 weeks from July 1992 to Ju...
Tembely, S.
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Lahlou-Kassi, A.
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Rege, J.E.O.
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Sovani, S.
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Diedhiou, M.L.
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Baker, R.L.
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[The epidemiology of nematode infections in sheep in a cool tropical environment]
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The epidemiology of nematode infections in sheep in a cool tropical environment
Ewe reproduction and productivity were studied in the highlands of Ethiopia in Horro and Menz ewes mated to lamb in both the wet and dry seasons from June 1992 to May 1997. The data included a total of 4890 mating records of which 2516 were Menz ewes and 2374 Horro ewes, with 2360 matings in the ...
Mukasa-Mugerwa, E.
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Anindo, D.O.
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Sovani, S.
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Lahlou-Kassi, A.
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Tembely, S.
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Rege, J.E.O.
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Baker, R.L.
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[Reproductive performance and productivity of Menz and Horro sheep lambing in the wet and dry seasons in the highlands of Ethiopia]
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Reproductive performance and productivity of Menz and Horro sheep lambing in the wet and dry seasons in the highlands of Ethiopia
The Menz and Horro highland sheep breeds are being evaluated at the ILCA Debre Birhan research station in Ethiopia for between-and within-breed genetic variation for resistance to internal parasites. The experimental design involves mating, for each breed, 150 ewes with 10 rams to lamb at the beg...
Rege, J.E.O.
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Tembely, S.
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Mukasa, E.
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Sovani, S.
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Anindo, D.O.
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Lahlou-Kassi, A.
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Baker, R.L.
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[Preliminary evidence for genetic resistance to endoparasites in Menz and Horro lambs in the highlands of Ethiopia]
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Preliminary evidence for genetic resistance to endoparasites in Menz and Horro lambs in the highlands of Ethiopia
Research in Kenya has confirmed that Red Maasai sheep are more resistant to gastrointestinal parasites than Dorper sheep and has shown that Small East African goats are more resistant than Galla goats. There is no difference in resistance between the Menz and Horro sheep breeds in Ethiopia. Herit...
Baker, R.L.
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Rege, J.E.O.
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Tembely, S.
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Mukasa-Mugerwa, E.
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Anindo, D.O.
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Mwamachi, D.M.
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Thorpe, W.R.
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Lahlou-Kassi, A.
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[Genetic resistance to gastrointestinal nematode parasites in some indigenous breeds of sheep and goats in East Africa]
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Genetic resistance to gastrointestinal nematode parasites in some indigenous breeds of sheep and goats in East Africa
A study was conducted to estimate heritabilities of, and genetic correlations among, body weight (WT) and testicular measurements - scrotal circumference (SC), testicular diameter (TD), testicular length (TL) and epididymal diameter (ED - in ram lambs between 6, 9 and 12 months old, and relations...
Toe, F.
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Rege, J.E.O.
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Mukasa-Mugerwa, E.
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Tembely, S.
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Anindo, D.O.
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Baker, R.L.
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Lahlou-Kassi, A.
,
[Reproductive characteristics of Ethiopian highland sheeI. Genetic parameters of testicular measurements in ram lambs and relationship with age at puberty in ewe lambs]
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Reproductive characteristics of Ethiopian highland sheeI. Genetic parameters of testicular measurements in ram lambs and relationship with age at puberty in ewe lambs
A study was conducted to investigate the effect of season on, and to estimate heritabilities of, and genetic correlations among, semen and spermatozoa characteristics and the relationship of these characteristics with measures of testicular or scrotal size in 6-, 9- and 12-month old ram lambs of ...
Rege, J.E.O.
,
Toe, F.
,
Mukasa-Mugerwa, E.
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Tembely, S.
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Anindo, D.O.
,
Baker, R.L.
,
Lahlou-Kassi, A.
,
[Reproductive characteristics of Ethiopian highland sheep. II. Genetic parameters of semen characteristics and their relationships with testicular measurements in ram lambs]
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Reproductive characteristics of Ethiopian highland sheep. II. Genetic parameters of semen characteristics and their relationships with testicular measurements in ram lambs