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Plasma progesterone profiles were used to monitor post-partum reproductive activity in 12 Small East African Zebu (Bos indicus) cows allocated to either supplementary or no supplementary feeding (control) with continious or restricted (twice daily) suckling regimes. Intact bulls were used for bre...


Tegegne, AzageEntwistle, K.W.Mukasa-Mugerwa, E.[Plasma progesterone and blood metabolite profiles in post-partum small East African Zebu cows]Plasma progesterone and blood metabolite profiles in post-partum small East African Zebu cows

Gondal and extragonadal sperm reserves were determined in testicular and epididymal tissues obtained from ten Small East African Zebu (SEAZ), ten unimproved Borana and nine improved Boran bulls. Bulls were mature and were between 6 and 8 years of age. Body weight and scrotal circumference differe...


Tegegne, AzageMukasa-Mugerwa, E.Entwistle, K.W.[Genotype differences in gonadal and extragonadal sperm reserves in mature Zebu bulls in Ethiopia]Genotype differences in gonadal and extragonadal sperm reserves in mature Zebu bulls in Ethiopia

A study undertaken to characterise the oestrous cycle in Zebu cows following oestrous induction with PGF (Prostaglandin F2alpha) and examines the function of the subsequently formed CL (corpus luteum) by monitoring levels of peripheral plasma progesterone.


Mukasa-Mugerwa, E.Tegegne, AzageMattoni, M.Cecchini, G.[Effect of oestrous synchronization with prostaglandin F2alpha in Ethiopian highland Zebu (Bos indicus) cows]Effect of oestrous synchronization with prostaglandin F2alpha in Ethiopian highland Zebu (Bos indicus) cows

A total of 64 bull calves, composed of 27 Boran and 37 Boran X Friesian, were weaned at 6 months of age and divided into supplement or control groups within breed. All bulls were kept in one paddock and grazed on natural pasture. Supplement groups received 1.5 kg per head day of a diet containing...


Tegegne, AzageEntwistle, K.W.Mukasa-Mugerwa, E.[Gonadal and extragonadal sperm reserves and testicular histometric characteristics in Zebu and crossbred bulls: Effect of dry season nutritional supplementation]Gonadal and extragonadal sperm reserves and testicular histometric characteristics in Zebu and crossbred bulls: Effect of dry season nutritional supplementation

Many efforts to increase milk and meat production by importing temperate breeds into the tropics are constrained by the breeds' lack of adaptation to tropical diseases, biologic and present management stresses. Moreover, feeding regimes developed for temperate breeds also do not suit animals indi...


Mukasa-Mugerwa, E.[Production function responses in post-partum Bos indicus (Zebu) cattle to nutrition supplementation]Production function responses in post-partum Bos indicus (Zebu) cattle to nutrition supplementation

The milk and meat productivity of Ethiopia's 27 million cattle is still low for the human population of 53 million, which grows at 2.9 percent yr and is expected to surpass 65 million at the end of this century. The present cattle population includes 40 percent (10.8 million) cows of breeding age...


Mukasa-Mugerwa, E.Tegegne, Azage[Reproductive performance in Ethiopian Zebu (Bos indicus) cattle: Constraints and impact on production]Reproductive performance in Ethiopian Zebu (Bos indicus) cattle: Constraints and impact on production

This work was conducted to assist the large cattle multiplication centres to produce more animals of the genotype being demanded to improve peasant farm income, to generate an alternative way of introducing the same genotype to farmers with limited income by using artificial insemination, to assi...


Mukasa-Mugerwa, E.[Technological improvement of Zebu cattle breeding efficiency]Technological improvement of Zebu cattle breeding efficiency

The effect of trypanosomosis on the resumption of postpartum ovarian function and oestrus activity was studied in small East African zebu cows maintained under natural trypanosomosis challenge. This was done through the determination of milk progesterone levels using the enzyme linked immunosor...


Tibbo, MarkosMukasa-Mugerwa, E.Abebe, G.Mulatu, W.[Effect of trypanosomosis on the resumption of postpartum ovarian function and oestrus activity in Zebu cows]Effect of trypanosomosis on the resumption of postpartum ovarian function and oestrus activity in Zebu cows

A total of 179 heifers, primiparous and multiparous Boran cows were assigned to four breeding units and mated over a 4 - month breeidng season in a single-sire mating system. Mean body weight and body condition scores at the beginning of mating ranged from 363 + 6 kg to 388 + 7 kg and from 6.7 + ...


Tegegne, AzageEntwistle, K.W.Mukasa-Mugerwa, E.[Factors affecting the reproductive performance of Boran (Bos indicus) cows in a single-sire mating system]Factors affecting the reproductive performance of Boran (Bos indicus) cows in a single-sire mating system

Fourty-four Borana X Friesian F1 crossbred calves born to Borana (Bos indicus) cows were randomly assigned to either suck their dams twice daily or bucket-feeding with 134 l. milk over a 57-day pre-weaning period. Their dams were also allocated either to a supplement group with grass hay ad libit...


Tegegne, AzageOsuji, P.O.Lahlou-Kassi, A.Mukasa-Mugerwa, E.[Effect of dam nutrition and suckling on lactation in Borana cows and growth in their Borana X Friesian crossbred calves in an early weaning system in Ethiopia]Effect of dam nutrition and suckling on lactation in Borana cows and growth in their Borana X Friesian crossbred calves in an early weaning system in Ethiopia

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