Figure 2.

Comparison of corticosterone titres following dexamethasone (DEX) administration 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. DEX injection tested the efficacy of negative feedback assessed from the lowest titres at 240 min post-capture following injection of exogenous DEX (n = 8, 31 and 7 for control (uninjected), alive and dead, respectively). Each bar represents the mean ± s.e.m. & p < 0.003 compared with all DEX-injected animals. *p = 0.022.