Neonatal nutrition, adult antioxidant defences and sexual attractiveness in the zebra finch.

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Etat: Public
Version: de l'auteur
ID Serval
serval:BIB_4BD567896B8B
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Neonatal nutrition, adult antioxidant defences and sexual attractiveness in the zebra finch.
Périodique
Proceedings. Biological Sciences
Auteur(s)
Blount J.D., Metcalfe N.B., Arnold K.E., Surai P.F., Devevey G.L., Monaghan P.
ISSN
0962-8452
Statut éditorial
Publié
Date de publication
2003
Peer-reviewed
Oui
Volume
270
Numéro
1525
Pages
1691-1696
Langue
anglais
Résumé
Early nutrition has recently been shown to have pervasive, downstream effects on adult life-history parameters including lifespan, but the underlying mechanisms remain poorly understood. Damage to biomolecules caused by oxidants, such as free radicals generated during metabolic processes, is widely recognized as a key contributor to somatic degeneration and the rate of ageing. Lipophilic antioxidants (carotenoids, vitamins A and E) are an important component of vertebrate defences against such damage. By using an avian model, we show here that independent of later nutrition, individuals experiencing a short period of low-quality nutrition during the nestling period had a twofold reduction in plasma levels of these antioxidants at adulthood. We found no effects on adult external morphology or sexual attractiveness: in mate-choice trials females did not discriminate between adult males that had received standard- or lower-quality diet as neonates. Our results suggest low-quality neonatal nutrition resulted in a long-term impairment in the capacity to assimilate dietary antioxidants, thereby setting up a need to trade off the requirement for antioxidant activity against the need to maintain morphological development and sexual attractiveness. Such state-dependent trade-offs could underpin the link between early nutrition and senescence.
Mots-clé
Animals, Antioxidants/metabolism, Body Weights and Measures, Female, Male, Nutritional Status/physiology, Sexual Behavior, Animal/physiology, Songbirds/metabolism, Songbirds/physiology
Pubmed
Web of science
Création de la notice
19/11/2007 10:26
Dernière modification de la notice
20/08/2019 13:59
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