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The most broadly applied generalizations of bioeconomics were derived from simple, non-spatial models. We develop a simple continuous spatial model in...
Read moreMany invasive species are introduced by trade, and there is a need for studies of pre-emptive measures to lower the risk of introductions, as post-est...
Read moreIn connexion with studies of insect pests and vectors of disease in Cocoa plantations, an investigation was made of the fungus pathogens of ants and o...
Read moreA model of the progress of an outbreak of foot and mouth disease in a single population of feral pigs, is described. The population was divided into c...
Read moreA mathematical model of the dynamics of a virus disease in a perennial plant population was developed. The population was divided into healthy, latent...
Read moreThe viable weed seed content of the surface soil at 78 sites in the upper Belize Valley, British Honduras, averaged 6488 seeds/m2 and included 54 spec...
Read moreRainfall data were collated for years preceding historical outbreaks of Mastomys [Praomys] rats in East Africa in order to test the hypothesis that su...
Read moreRecent reports on bee health suggest that sublethal doses of pesticides have negative effects on wild bee reproduction and ultimately on their populat...
Read moreEchium plantagineum is native to the western Mediterranean Basin, where it is a common, but not dominant, component of species-rich annual grasslands....
Read moreThe following is based largely on the author's summary of this account of a study of the fauna of stones in the Vaal River in the north-east of Cape P...
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