Figure 2. Antioxidant capacity (AOC; mmol l⁻¹ of HClO neutralised) in relation to age.

Mean (+ SE bar) AOC of individuals that were recorded to have survived up to 2 years (age class 1–2, n = 116), 3 years (1–3, n = 55), or 4 years (1–4, n = 28) (see Methods for details). For all age classes there was no significant variation of AOC with age in repeated-measures mixed models with individual as a random effect and age (covariate) and sex (factor) as fixed effects. When included in the model, the effect of the second order polynomial term of age was non-significant (see Results).