Indirect costs of parasitism are shaped by variation in the type of immune challenge and food availability

Détails

ID Serval
serval:BIB_0C16B96B2F9B
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Indirect costs of parasitism are shaped by variation in the type of immune challenge and food availability
Périodique
Evolutionary Biology
Auteur(s)
Bize P., Piault R., Gasparini J., Roulin A.
ISSN
0071-3260
Statut éditorial
Publié
Date de publication
2010
Peer-reviewed
Oui
Volume
37
Numéro
4
Pages
169-176
Langue
anglais
Résumé
Parasites can inflict indirect fitness costs to their hosts by eliciting costly immune responses. These costs depend on the type and amount of immunostimulants presented to the host immune system but also on the amount of resources available to fuel host immune responses. Here, we investigated how the relative costs of two different types of immune challenge are modulated by variation in food availability. We injected nestling tawny owls (Strix aluco) with either 10 mu g of phytohaemagglutinin (PHA) or 20 mu g of lipopolysaccharide (LPS), and subsequently raised them under two different food regimes (food-restricted vs. ad libitum). After controlling for food consumption, we found that LPS-injected nestlings lost more body mass than PHA-injected ones only when food-restricted. We also found that body mass gain of owlets fed ad libitum decreased with the intensity of the skin swelling response against LPS, but not PHA. These experimental and correlative results suggest that nestling tawny owls suffered greater immune costs when treated with LPS than PHA, and that variation in the costs of two different types of immune challenge can be exacerbated under conditions of low food availability. Our study highlights the importance of taking into consideration the interplay between host immunity and nutrition in the study of indirect costs of parasitism.
Mots-clé
Condition-dependent, Food availability, Immunocompetence, Immunopathology, Tawny owl
Web of science
Création de la notice
20/08/2010 16:54
Dernière modification de la notice
03/03/2018 13:37
Données d'usage