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Fig. 1. Effects of flight duration on oxidative status. Pigeons that flew around
200 km (LD, long distance; N=7) showed (A) increased levels of
oxidative damage as measured by serum reactive oxygen metabolites (ROMs), (B)
decreased total serum antioxidant capacity (OXY), and (C) increased levels of
oxidative stress (OS) as measured by the ratio between ROMs and OXY
(x1000) compared with both controls (C; N=7) or pigeons that
flew around 60 km (SD, short distance; N=8). Values are shown as mean
± s.e.m. of post- minus pre-treatment values. P values of the
generalized linear/non-linear models are shown.