Relationship between female emergence date from hibernation and
pup emergence date:
Female emergence date was a significant predictor of pup emergence date,
with females that emerged later producing pups that emerged later
(Estimate ± SE = 0.286 ± 0.072; Table S1, Figure 1). However, the slope
of the relationship between pups’ and females’ emergence dates was also
significantly different from 1 (t-value = -10.3, df = 134.1, p-value
< 0.001). Some females are having their pups emerge earlier
than would be expected based on their emergence date, while the majority
are having their pups emerge later than would be expected (Figure 1)
indicating that some females reproduced before emerging and most delayed
reproduction after emergence (Figure 1).