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Oxidative stress physiology in relation to life history traits of a free-living vertebrate: the spotted snow skink, Niveoscincus ocellatus

Citation

Isaksson, C and While, GM and Olsson, M and Komdeur, J and Wapstra, E, Oxidative stress physiology in relation to life history traits of a free-living vertebrate: the spotted snow skink, Niveoscincus ocellatus, Integrative Zoology, 6, (2) pp. 140-149. ISSN 1749-4877 (2011) [Refereed Article]


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The definitive published version is available online at: http://onlinelibrary.wiley.com/

Official URL: http://onlinelibrary.wiley.com/

DOI: doi:10.1111/j.1749-4877.2011.00237.x

Abstract

Recent research suggests that oxidative stress, via its links to metabolism and senescence, is a key mechanism linking life history traits such as fecundity and growth with survival; however, this has rarely been put under empirical scrutiny within free-living populations. Using a wild population of live-bearing skinks, we explored how plasma antioxidant activity (OXY), reactive oxidative metabolites (ROM), and the estimated oxidative stress index are associated with female and male life history. We found that male skinks have a significantly higher ROM and estimated oxidative stress index than female skinks, but this was not accompanied by a sex difference in mortality. Both sexes showed a non-linear association between OXY and age, indicating that the oldest and youngest indi- viduals had the lowest OXY. Interestingly, female skinks with high OXY showed a decreased probability of sur- vival to the following season. However, we found no significant associations between female reproductive invest- ment (litter size or litter mass) or parturition date (i.e. metabolism) and oxidative status. Combined, our results offer mixed support for a role of oxidative stress in mediating life history traits and suggest that future studies need to explore oxidative stress during vitellogenesis in addition to using an intra-individual approach to understand the cost of reproduction and patterns of aging.

Item Details

Item Type:Refereed Article
Keywords: antioxidants, ectotherm, Egernia whitii, oxidative stress, personality.
Research Division:Biological Sciences
Research Group:Physiology
Research Field:Animal Physiology - Systems
Objective Division:Environment
Objective Group:Ecosystem Assessment and Management
Objective Field:Ecosystem Assessment and Management at Regional or Larger Scales
Author:While, GM (Dr Geoff While)
Author:Wapstra, E (Associate Professor Erik Wapstra)
ID Code:70821
Year Published:2011
Web of Science® Times Cited:12
Deposited By:Zoology
Deposited On:2011-07-04
Last Modified:2017-10-31
Downloads:1 View Download Statistics

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