Figure 1.

Comparison of corticosterone titres in marine iguanas captured prior to an El Niño. Assignment of individual iguanas to alive or dead categories was made subsequent to the El Niño. Baseline, initial corticosterone titres collected at capture (n = 73 and 23 for alive and dead, respectively). Stressed, stress-induced titres collected 30 min after capture and restraint (n = 74 and 22 for alive and dead, respectively). ACTH, HPA capacity assessed from titres collected 30 min after exogenous ACTH injection (n = 37 and 12 for alive and dead, respectively). Each bar represents the mean ± s.e.m.