Body mass
Pre-hibernation fat stores were strongly related to body mass (β= 0.597, F1,171 = 826.7, p =
<0.001, adjusted R2 = 0.8276; Figure 2).
Latitude (Northing; β = -0.08, p-value = 0.07) and the
number of days below freezing (Daysfreeze; β =0.04, p-value < 0.001) best predicted fat mass across
the species’ distribution (AICc = 162.57; Table S4). However, the
model including latitude, number of annual days below freezing, and
elevation performed similarly (ΔAICc < 2; Table S4).
Given the best model, the median predicted pre-hibernation body mass
across the species’ distribution of M. lucifugus was 8.65 g
(mean = 9.14 g, sd = 1.84 g) and 95% of the cells
predicted values between 7.04 g and12.52 g. Median pre-hibernation fat
stores were predicted at 2.32g (mean = 2.61 g, sd = 1.10
g) with 95% of cells predicting available fat available ranging between
1.36 g and 4.63 g.