Senescence in cell oxidative status in two bird species with contrasting life expectancy.

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Etat: Public
Version: Final published version
ID Serval
serval:BIB_4E657C258D0B
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Senescence in cell oxidative status in two bird species with contrasting life expectancy.
Périodique
Oecologia
Auteur(s)
Bize P., Cotting S., Devevey G., van Rooyen J., Lalubin F., Glaizot O., Christe P.
ISSN
1432-1939 (Electronic)
ISSN-L
0029-8549
Statut éditorial
Publié
Date de publication
2014
Peer-reviewed
Oui
Volume
174
Numéro
4
Pages
1097-1105
Langue
anglais
Résumé
Oxidative stress occurs when the production of reactive oxygen species (ROS) by an organism exceeds its capacity to mitigate the damaging effects of the ROS. Consequently, oxidative stress hypotheses of ageing argue that a decline in fecundity and an increase in the likelihood of death with advancing age reported at the organism level are driven by gradual disruption of the oxidative balance at the cellular level. Here, we measured erythrocyte resistance to oxidative stress in the same individuals over several years in two free-living bird species with contrasting life expectancy, the great tit (known maximum life expectancy is 15.4 years) and the Alpine swift (26 years). In both species, we found evidence for senescence in cell resistance to oxidative stress, with patterns of senescence becoming apparent as subjects get older. In the Alpine swift, there was also evidence for positive selection on cell resistance to oxidative stress, the more resistant subjects being longer lived. The present findings of inter-individual selection and intra-individual deterioration in cell oxidative status at old age in free-living animals support a role for oxidative stress in the ageing of wild animals.
Pubmed
Web of science
Open Access
Oui
Création de la notice
04/10/2013 12:18
Dernière modification de la notice
20/08/2019 14:03
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