Figure 4.
Mean variance of the log-transformed First-Passage Time (FPT) as a function of the radius r . Mean variance in log(FPT) is presented with ± SE (grey shade) and r is in kilometres (km). Mean variance in log(FPT) was calculated from 401 complete annual paths of migratory caribou spanning from 1 August to 31 July. The peak in variance was observed at r max = 25 km.