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Patterns of variation of serum oxidative stress markers in two seabird species

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Abstract

Variation in oxidative stress markers in natural populations may provide a useful background for understanding variation in life history strategies. In this study, we seek to evaluate patterns of variation in levels of reactive oxygen metabolites (markers of oxidative damage), serum antioxidant capacity, and serum concentration of thiols (antioxidants endogenously synthesized) in nestling and breeding blue petrels (Halobaena caerulea) and in breeding Antarctic prions (Pachyptila desolata). Male and female prions and nestling petrels did not differ in any of the oxidative stress markers. The serum antioxidant capacity positively correlated with the sample time in nestling blue petrels. Breeding petrels with higher body condition index had higher serum antioxidant capacity and circulating thiols. Finally, both seabird species showed lower levels of reactive oxygen metabolites and higher levels of serum antioxidant capacity than previously studied bird species.
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Keywords: Antioxidants; fasting; oxidative damage; petrels; prions; reproduction

Document Type: Research Article

Affiliations: Centre d'Ecologie Fonctionnelle et Evolutive, Unité Mixte de Recherche 5175, 1919 Route de Mende, FR-34293 Montpellier cedex 5, France

Publication date: 2010-04-01

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