Figure 3.

Segmental hair cortisol concentrations were significantly different between seasons (Wilcoxon rank sum test, p<0.05). The cumulative probability on the Y-axis shows that at the 50^th percentile (horizontal line), hair cortisol concentrations were lower in the summer than in the fall. There is also an increase in the range of hair cortisol samples in the fall, relative to the summer. This is evident by the similarity in hair cortisol concentrations at lower percentiles between the two seasons, but large difference in hair cortisol concentrations at higher percentiles between the two seasons.