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The predicted performance of nine crossbreeding strategies for milk production and reproductive traits and cow live weights (LW) were compared. The strategies were selected because of their superiority to many others. The data were from crosses of Ayrshire (A), Brown Swiss (B), Friesian (F) and S...


Kahi, A.K.Nitter, G.Thorpe, W.R.Gall, C.F.[Crossbreeding for dairy production in the lowland tropics of Kenya. II. Prediction of performance of alternative crossbreeding strategies]Crossbreeding for dairy production in the lowland tropics of Kenya. II. Prediction of performance of alternative crossbreeding strategies

A total of 1443 records were used to estimate individual and maternal additive genetic breed and heterotic effects for preweaning growth and survival traits of crosses of Ayrshire (A), Brown Swiss (B), and Sahiwal (S) in a dairy herd in the lowland coastal tropics of Kenya. Individual and matern...


Kahi, A.K.Mackinnon, M.J.Thorpe, W.R.Baker, R.L.Njubi, D.[Estimation of individual and maternal additive genetic and heterotic effects for preweaning traits of crosses of Ayrshire, Brown Swiss and Sahiwal cattle in the lowland tropics of Kenya]Estimation of individual and maternal additive genetic and heterotic effects for preweaning traits of crosses of Ayrshire, Brown Swiss and Sahiwal cattle in the lowland tropics of Kenya
Autor: Wunder, Sven

Over the past several decades, significant donor funding has been directed to sustainable forest management in the tropics, in the hope of combining forest conservation with economic gains through sustainable use. To date, this approach has produced only modest results in terms of changed silvicu...


Wunder, Sven[Are direct payments for environmental services spelling doom for sustainable forest management in the tropics?]Are direct payments for environmental services spelling doom for sustainable forest management in the tropics?
Autor: Tembely, S.

The development and survival of nematode parasites of sheep were studied in a cool tropical environment of the highlands of Ethiopia on 24 plots serially contaminated with Haemonchus contortus, Longistrongylus elongata and Trichostrongylus colubriformis eggs over a period of 2 consecutive years f...


Tembely, S.[Development and survival of infective larvae of nematode parasites of sheep on pasture in a cool tropical environment]Development and survival of infective larvae of nematode parasites of sheep on pasture in a cool tropical environment

Breeding objectives were developed for meat sheep in smallholder production circumstances in the tropics. The traits considered were litter size, lambing frequency, pre-weaning, and post-weaning lamb survival to 12 months, ewe survival, lamb live weight at 12-month, mature ewe live weight, consum...


Kosgey, I.S.Arendonk, Johan A.M. vanBaker, R.L.[Economic values for traits of meat sheep in medium to high production potential areas of the tropics]Economic values for traits of meat sheep in medium to high production potential areas of the tropics

Ruminants adapt to periodic fluctuation in feed resources by accumulating fat stores during favourable periods. Thus, genetic variations, among ruminant genotypes, in the capa city to deposit fat could be exploited through breeding to improve animal productivity in traditional tropical production...


Ermias, E.Yami, A.Rege, J.E.O.[Fat deposition in tropical sheep as adaptive attribute to periodic feed fluctuation]Fat deposition in tropical sheep as adaptive attribute to periodic feed fluctuation
Purbopuspito, J.Veldkamp, E.Brumme, R.Murdiyarso, Daniel[Trace gas fluxes and nitrogen cycling along an elevation sequence of tropical montane forests in Central Sulawesi, Indonesia]Trace gas fluxes and nitrogen cycling along an elevation sequence of tropical montane forests in Central Sulawesi, Indonesia

We discuss a recent press release calling on wealthy countries to do more to combat climate change and protect their biodiversity. We examine some further examples of how questionable views are imposed unilaterally on conservation problems. Until we better engage with local perspectives we shall ...


Meijard, E.Sheil, Douglas[A modest proposal for wealthy countries to reforest their land for the common good]A modest proposal for wealthy countries to reforest their land for the common good

Biodiversity monitoring activities can hinder rather than promote conservation in tropical countries.The national institutions responsible for conservation in developing countries have very limited resources, which given donors and richer agencies scope for considerable influence. However, those ...


Sheil, Douglas[Why doesn't biodiversity monitoring support conservation priorities in the tropics?]Why doesn't biodiversity monitoring support conservation priorities in the tropics?

Plasma progesterone concentrations were determined every 10 days for 38 grazing Menz ewe lambs from weaning until conception. Lambs were either fed extra supplementry concentrates and/or drenched for endoparasites. Inadequate nutrition delayed puberty onset by 4 to 5 months. Progesterone concentr...


Mukasa-Mugerwa, E.Mutiga, E.R.[Peripubertal plasma progesterone patterns in Ethiopian Menze ewe lambs]Peripubertal plasma progesterone patterns in Ethiopian Menze ewe lambs

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