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

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State: Public
Version: Final published version
Serval ID
serval:BIB_4E657C258D0B
Type
Article: article from journal or magazin.
Collection
Publications
Title
Senescence in cell oxidative status in two bird species with contrasting life expectancy.
Journal
Oecologia
Author(s)
Bize P., Cotting S., Devevey G., van Rooyen J., Lalubin F., Glaizot O., Christe P.
ISSN
1432-1939 (Electronic)
ISSN-L
0029-8549
Publication state
Published
Issued date
2014
Peer-reviewed
Oui
Volume
174
Number
4
Pages
1097-1105
Language
english
Abstract
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
Yes
Create date
04/10/2013 12:18
Last modification date
20/08/2019 14:03
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