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Age, oxidative stress exposure and fitness in a long-lived seabird [Functional Ecology]

Keywords : Life history trade-off, Senescence, Oxidative stress, Phalacrocorax aristotelis

par Frédéric Magné - publié le

The need to manage exposure to oxidative stress, which can damage macromolecules, is thought to influence the resolution of life history trade-offs. Oxidative damage is expected to increase with age as a consequence of changes in the optimal investment in defences or repair, and/or because of senescence in antioxidant defence systems, though the pattern might differ between short and long-lived species. However, data on age related changes in damage levels in wild populations are rare.
Using cross-sectional and longitudinal data collected over three years, we examine variation in a measure of oxidative damage exposure in known age, wild European Shags (Phalacrocorax aristotelis), a relatively long lived species.(...)

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