Multiple comparisons in resource selection using logistic regression

Resource selection by wildlife is often studied by observing if a particular resource category is used or not, or by observing and comparing quantitative attributes of used and unused plots. That is, plots may be described as used or not used, as belonging to a particular resource category, and through an array of quantitative characteristics thought to be related to their use status. Of interest is the situation where different resource categories have experienced differing treatments, and one category is considered the control. A method of comparing selection of treatment categories to selection of the control is presented here when several quantitative characteristics are concurrently measured on each plot. The method is used to investigate the effect of grazing and vegetative characteristics on use of plots by pygmy rabbits.