Clutch size and malarial parasites in female great tits.

Détails

ID Serval
serval:BIB_956A1F234009
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Clutch size and malarial parasites in female great tits.
Périodique
Behavioral Ecology
Auteur(s)
Oppliger Anne, Christe P., Richner H.
ISSN
1045-2249
Statut éditorial
Publié
Date de publication
1997
Peer-reviewed
Oui
Volume
8
Numéro
2
Pages
148-152
Langue
anglais
Résumé
Life-history models predict an evolutionary trade-off in the allocation of resources to current versus future reproduction. This corresponds, at the physiological level, to a trade-off in the allocation of resources to current reproduction or to the immune system, which will enhance survival and therefore future reproduction. For clutch size, life-history models predict a positive correlation between current measurement in eggs and the subsequent parasite load. Tn a population of great tits, we analyzed the correlation between natural clutch size of females and the subsequent prevalence of Plasmodium spp., a potentially harmful blood parasite. Females that showed, 14 days after hatching of the nestlings, an infection with Plasmodium had a significantly larger clutch (9.3 eggs +/- 0.5 SE, n = 18) than uninfected females (8.0 eggs +/- 0.2 SE, n = 80), as predicted by the allocation trade-off. Clutch size was positively correlated with tile prevalence of Plasmodium, but brood size 14 days after hatching was not. This suggests that females incur higher costs during laying the clutch than during rearing nestlings. Infection status of some females changed between years, and these changes were significantly correlated with a change in clutch size as predicted by die trade-off. The link between reproductive effort and parasitism may represent a possible mechanism by which the cost of egg production is mediated into future survival and may thereby be an important selective force in the shaping of clutch size.
Mots-clé
blood parasites, clutch size
Web of science
Open Access
Oui
Création de la notice
24/01/2008 20:14
Dernière modification de la notice
08/05/2019 22:17
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