Modelling the vertical distribution of insects
(December 31, 1969 7:00 PM - 7:00 PM)
The Weibull distribution is used to model the vertical distribution of insects under the following activities: natural flight without any artificial stimulus, resting behaviour, and response to trapping involving colour attractants and odour baits. Formulae are derived for determining the mean heights at which insect flight, resting and trapping tend to occur. The model is tested on data from three sources: coleoptera in natural flight over Tallulah, Louisiana; Glossina palpalis palpalis at rest during the dry season in Nigeria; and catches of Glossina spp., in Rwanda, by traps placed at varying heights above the ground. Results show that different species of insects tend to fly, rest or be trapped at heights which are characteristic of the species.