Twofold cost of reproduction: an increase in parental effort leads to higher malarial parasitaemia and to a decrease in resistance to oxidative stress.

Détails

ID Serval
serval:BIB_D9DF654B9E46
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Twofold cost of reproduction: an increase in parental effort leads to higher malarial parasitaemia and to a decrease in resistance to oxidative stress.
Périodique
Proceedings of the Royal Society B Biological Sciences
Auteur(s)
Christe P., Glaizot O., Strepparava N., Devevey G., Fumagalli L.
ISSN
1471-2954 (Electronic)
ISSN-L
0962-8452
Statut éditorial
Publié
Date de publication
2012
Peer-reviewed
Oui
Volume
279
Numéro
1731
Pages
1142-1149
Langue
anglais
Résumé
Parental effort is usually associated with high metabolism that could lead to an increase in the production of reactive oxidative species giving rise to oxidative stress. Since many antioxidants involved in the resistance to oxidative stress can also enhance immune function, an increase in parental effort may diminish the level of antioxidants otherwise involved in parasite resistance. In the present study, we performed brood size manipulation in a population of great tits (Parus major) to create different levels of parental effort. We measured resistance to oxidative stress and used a newly developed quantitative PCR assay to quantify malarial parasitaemia. We found that males with an enlarged brood had significantly higher level of malarial parasites and lower red blood cell resistance to free radicals than males rearing control and reduced broods. Brood size manipulation did not affect female parasitaemia, although females with an enlarged brood had lower red blood cell resistance than females with control and reduced broods. However, for both sexes, there was no relationship between the level of parasitaemia and resistance to oxidative stress, suggesting a twofold cost of reproduction. Our results thus suggest the presence of two proximate and independent mechanisms for the well-documented trade-off between current reproductive effort and parental survival.
Mots-clé
Plasmodium, qPCR, oxidative stress, antioxidants, Parus major, great tit
Pubmed
Web of science
Open Access
Oui
Création de la notice
22/08/2011 14:31
Dernière modification de la notice
20/08/2019 16:59
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