Fig. 1

Mean predicted utility ± 1 standard error (shaded area) for a resource unit as a function of covariate value over the observed range, based on the top model. All other covariates were held at mean values to calculate predictions. A Air temperature; B depth of snow cover; C accumulated days of frost; D accumulated days of snow ≥ 2.54 cm deep; E presence of ice cover ≥ 1 cm thick. Note different y-axis ranges. Negative slope values represent a decrease in the probability that the associated alternative is selected as the date for relocation