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Reports results of a study on the relationships between tsetse challenge and trypanosome prevalence in trypanotolerant and susceptible breeds of cattle. Presents data on tsetse challenge and trypanosome prevalence in N'Dama and Zebu cattle in Zaire, Gabon, Ethiopia and Cote d'Ivoire.


Leak, S.G.A.Colardelle, C.Coulibaly, L.Dumont, P.Feron, A.Hecker, P.D'Ieteren, G.D.M.Jeannin, P.Minengu, M.Minja, S.Mulatu, W.Nankodaba, G.Ordner, G.Rowlands, G.J.Sauveroche, B.Tikubet, G.Trail, J.C.M.[Relationships between tsetse challenge and trypanosome prevalence in trypanotolerant and susceptible cattle]Relationships between tsetse challenge and trypanosome prevalence in trypanotolerant and susceptible cattle

Predictions of tree size and density from a remote sensing model were used together with allometric regression equations from the literature to estimate foliage and above-ground woody biomass in sparse woodlands. Study sites with woody cover ranging from 10-50 per cent were located in the Sudania...


Franklin, J.Hiernaux, Pierre H.Y.[Estimating foliage and woody biomass in Sahelian and Sudanian woodlands using a remote sensing model]Estimating foliage and woody biomass in Sahelian and Sudanian woodlands using a remote sensing model
Henricksen, B.L.Durkin, J.W.[Growing period and drought early warning in Africa using satellite data]Growing period and drought early warning in Africa using satellite data

Compares normalized difference vegetation index data derived from the advanced very high resolution radiometer on board the NOAA-7 satellite for the 1983 growing season for the saheliant zone of Niger wit biomass estimates derived from an emperical grassland productivity model.


Justice, C.O.Hiernaux, Pierre H.Y.[Monitoring the grasslands of the Sahel using NOAA AVHRR data: Niger 1983]Monitoring the grasslands of the Sahel using NOAA AVHRR data: Niger 1983

The objectives of this work were 1) to compare the goodness-of-fit of empirical models of the lactation curve and 2) to analyze the factors affecting the shapes of the lactation curves, the parameters describing them, and the overall milk yield of Latxa dairy sheeA total of 14,699 records from 27...


Ruiz, R.Oregui, L.M.Herrero, Mario T.[Comparison of models for describing the lactation curve of Latxa sheep and an analysis of factors affecting milk yield]Comparison of models for describing the lactation curve of Latxa sheep and an analysis of factors affecting milk yield

Gas production profiles were obtained from in vitro fermentation of stems of six genotypes of sorghum and millet grown at the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), India. The ranking of sorghum and millet genotypes by cumulative gas production was consistent ...


Zerbini, E.Sharma, A.Rattunde, H.F.W.[Fermentation kinetics of stems of sorghum and millet genotypes]Fermentation kinetics of stems of sorghum and millet genotypes

The 2002 World Summit on Sustainable Development focussed attention on agricultural sustainability and biodiversity in developing countries. These goals are relevant for livestock production in Kenya, where development agencies encourage resource-poor smallholders to acquire large, exotic, high-y...


King, J.M.Parsons, D.J.Turnpenny, J.R.Nyangaga, J.Bakari, P.Wathes, C.M.[Modelling energy metabolism of friesians in Kenya smallholdings shows how heat stress and energy deficit constrain milk yield and cow replacement rate]Modelling energy metabolism of friesians in Kenya smallholdings shows how heat stress and energy deficit constrain milk yield and cow replacement rate

In this case study of the Yale agro-pastoral zone in southern Burkina Faso, the sustainability of tsetse control as a local public good was shown to depend upon farmers' contributions to establish and maintain the traps and targets that attract and kill tsetse flies. Contingent valuation (CV) tec...


Kamuanga, M.Swallow, B.M.Sigue, H.Bauer, B.[Evaluating contingent and actual contributions to a local public good: Tsetse control in the Yale agro-pastoral zone, Burkina Faso]Evaluating contingent and actual contributions to a local public good: Tsetse control in the Yale agro-pastoral zone, Burkina Faso

Agricultural production in the semi-arid agro-ecosystems of the Sahel centres on cereal staple crops and pastoralism with increasing crop-livestock integration. Animals mobilize soil fertility through manure production, graze crop by-products, and transfer nutrients from distant pastures to crop...


Rovere, R. LaHiernaux, Pierre H.Y.Keulen, H. vanSchiere, J.B.Szonyi, J.A.[Co-evolutionary scenarios of intensification and privatization of resource use in rural communities of south-western Niger]Co-evolutionary scenarios of intensification and privatization of resource use in rural communities of south-western Niger

In the Ankole pastoral production system animals are grazed on pasture all year round. The cattle are not supplemented with conserved pasture or commercial feed except minerals. The large number of factors that influence production makes it impractical and expensive to use field trials to explore...


Mulindwa, H.Galukande, E.Wurzinger, MariaOjango, Julie M.K.Okeyo Mwai, AllySölkner, J.[Stochastic simulation model of Ankole pastoral production system: Model development and evaluation]Stochastic simulation model of Ankole pastoral production system: Model development and evaluation

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