S.J. Mayor, J.A. Schaefer, D.C. Schneider, and S.P. Mahoney
Detecting habitat selection depends on the spatial scale of analysis, but multi-scale studies have been limited by the use of a few, spatially variable, hierarchical levels. We developed spatially explicit approaches to quantify selection along a continuum of scales using spatial (coarse-graining) and geostatistical (variogram) pattern analyses at multiple levels of habitat use (seasonal range, travel routes, feeding areas, and microsites).
Abstract: Functional explanations for horns and antlers on female ungulates are conflicting. The authors tested the hypothesis that such appendages serve in intraspecific competition for resources by analyzing the tendency for female caribou to carry antlers across a 1000 km wide gradient. The authors predicted that females in populations experiencing more intense or more protracted interference competition, reflected as greater depth and duration of snow cover, would exhibit greater propensity to bear antlers.