Research overview: utilization distribution overlap indices

Quantifying how much two animals' ranges overlap is central to questions of territoriality, social structure, and resource competition, and this overview surveys the statistical indices used. Measures such as the volume of intersection, Bhattacharyya's affinity, and utilization-distribution overlap indices compare the probability surfaces of two individuals rather than just their boundary polygons, capturing whether shared areas are used intensively or only marginally. For felids, these indices test whether neighbors maintain exclusive cores while sharing peripheries, illuminating land-tenure systems and mating opportunities. The overview discusses how estimator choice and autocorrelation propagate into overlap estimates and the importance of accounting for temporal as well as spatial sharing. Overlap analysis turns home-range maps into quantitative descriptions of felid social spacing.