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Red Maasai and Dorper sheep were evaluated for their resistance to gastro-intestinal (GI) nematode parasites (predominantly Haemonchus contortus), productivity and productive efficiency (assessed on a metabolizable energy basis) in experiments undertaken at the Kenyan coast (sub-humid environment...


Baker, R.L.Mugambi, J.M.M.Audho, James O.Carles, A.B.Thorpe, W.R.[Genotype by environment interactions for productivity and resistance to gastro-intestinal nematode parasites in Red Maasai and Dorper sheep]Genotype by environment interactions for productivity and resistance to gastro-intestinal nematode parasites in Red Maasai and Dorper sheep

Data collected in the Mt. Kulal area of the Marsabit district by the Integrated Project in Arid Lands (IPAL) are being analyzed for use in simulation studies. Weight, lactation, reproduction, health and forage quality and availability data were collected from flocks of Galla goats and Somali shee...


Smith, G.Carles, A.B.Schwartz, J.Blackburn, A.Ruvuna, F.Cartwright, T.C.[Analysis and synthesis of small ruminant production systems]Analysis and synthesis of small ruminant production systems

Disease resistance/tolerance, productivity and efficiency of Red Massai and Dorper sheep evaluated in experiments at the Kenya coast (humid environment) and the Kenya highlands (Semi-arid environment). There were important breed by location interactions for LWT, mortality rates and reproduction r...


Baker, R.L.Mugambi, J.M.M.Audho, James O.Carles, A.B.Thorpe, W.R.[Comparison of Red Maasai and Dorper sheep for resistance to gastro-intestinal nematode parasites productivity and efficiency in a humid and a semi-arid environment in Kenya]Comparison of Red Maasai and Dorper sheep for resistance to gastro-intestinal nematode parasites productivity and efficiency in a humid and a semi-arid environment in Kenya

Seasonal breeding is potentially a powerful intervention affecting productivily, particularly so in semi-arid environments where seasonal differences are great; however, variability is also great, increasing the risk for such interventions. Simulation was used to examine the effects of 5 breeding...


Carles, A.B.Blackburn, H.D.Schwartz, H.J.[A simulation of the effects of breeding season on the productivity of Small East African goats on a Kenyan rangeland]A simulation of the effects of breeding season on the productivity of Small East African goats on a Kenyan rangeland

Red Maasai [Masai] and Dorper sheep were evaluated for their resistance to gastrointestinal nematode parasites (predominantly Haemonchus contortus), productivity and efficiency in experiments undertaken at the Kenyan coast (humid environment) and the Kenya highlands (semiarid environment). It was...


Baker, R.L.Mugambi, J.M.M.Audho, James O.Carles, A.B.Thorpe, W.R.[Comparison of Red Maasai and Dorper sheep for resistance to gastro-intestinal nematode parasites: Productivity and efficiency in a humid and a semi-arid environment in Kenya]Comparison of Red Maasai and Dorper sheep for resistance to gastro-intestinal nematode parasites: Productivity and efficiency in a humid and a semi-arid environment in Kenya

Various fertility parameters are under investigation in the Small East African goat at Isiolo, northern Kenya. A programme of aseasonal breeding is used and parameters are examined in relation to the quantity and quality of forage available. Breeding groups consisting of 18 females each are used:...


Rutagwenda, T.Schwartz, H.J.Carles, A.B.Said, A.N.[Effects of seasonal forage supply on some fertility parameters in the Small East African goat in northern Kenya]Effects of seasonal forage supply on some fertility parameters in the Small East African goat in northern Kenya

Comparative evaluation of some cattle breeds and their crosses were done to provide a basis for recommendations on the direction of breeding and management of cattle for enhanced productivity in semi-arid and arid areas of Kenya. Data from 1055 calves of Small East African Shorthorn Zebu (Z), Bor...


Mwandotto, B.A.J.Carles, A.B.Cartwright, T.C.[Weaning and 18-month weights of Boran, East African Shorthorn Zebu and Sahiwal breeds or crosses in Kenya]Weaning and 18-month weights of Boran, East African Shorthorn Zebu and Sahiwal breeds or crosses in Kenya

A comparison was made of the growth curves for early and late eruptors (steers whose eruption age of the first incisor pair was less than the mean, and greater than the mean respectively). From birth to 195 weeks early eruptors were consistently heavier than late eruptors (P


Carles, A.B.Lampkin, K.M.[Studies of the permanent incisor eruption and body development of the large East African Zebu (Boran): 2. Relations of incisor eruption with body growth, body development, and carcass composition]Studies of the permanent incisor eruption and body development of the large East African Zebu (Boran): 2. Relations of incisor eruption with body growth, body development, and carcass composition

Observations were made of the ages at first appearance of each pair of permanent incisors (‘eruption age’), and the time from first appearance to full eruption of each pair (‘eruption’), for Large East African Zebu cattle (Boran). For females the eruption ages were found to be 108.5±9.9 weeks, 13...


Carles, A.B.Lampkin, K.M.[Studies of the permanent incisor eruption, and body development, of the large East African Zebu (Boran): 1. The ages at first appearance of the incisors, lengths of the incisor eruption period, and source of variation]Studies of the permanent incisor eruption, and body development, of the large East African Zebu (Boran): 1. The ages at first appearance of the incisors, lengths of the incisor eruption period, and source of variation

A study was made of the levels of oestrous activity of two indigenous breeds of sheep (Somali and Nandi) and three exotic breeds of sheep (Merino, Karakul and New Zealand Romney Marsh) over a period of 3 years, in an equatorial environment. Breed was the only significant source of variation for t...


Carles, A.B.Kipngeno, W.A.K.[The effect of season and the introduction of rams on oestrous activity in Somali, Nandi, Merino, Karakul and New Zealand Romney Marsh ewes in Kenya]The effect of season and the introduction of rams on oestrous activity in Somali, Nandi, Merino, Karakul and New Zealand Romney Marsh ewes in Kenya

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