Abstract
Abstract. The choices animals make in dispersal are of interest because they describe in part how populations adjust to a changing environment. We investigated which factors influence whether adult Florida Scrub-Jays delay breeding within their natal territories or disperse to breed. Factors considered included those pertaining to individuals (sex, age, parents), breeding opportunities (territory densities, deaths of breeders, potential mates, competitors [nonbreeders of the same sex]), and habitat (quality, suburb versus conservation area). We compared models that included each of these factors or combinations of them. We used nomograms to evaluate effect sizes and post hoc analyses to explore nonlinear effects of variables and their relative importance. Models that included only one or a few variables had little support. Models with the greatest support included parents, deaths of breeders, age, sex, and potential mates. Increased deaths of breeders greatly decreased the probabilities of delayed dispers...
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