Fig. 2. Total (unbound and bound to corticosteroid binding globulin) corticosterone
(CORT) levels at the end of the behavioral observation in control and
CORT-treated nestlings in experiment 1. There was no effect of age but there
was a significant effect of treatment on the hormone levels
(P<0.001). N=9, 13, 8 for the controls and 10, 14, 13 for
the CORT-treated groups D1–3, 4–6 and 7–9, respectively (D,
days post-hatching).