Effect of testosterone on immunocompetence, parasite load, and metabolism in the common wall lizard (Podarcis muralis)

Détails

ID Serval
serval:BIB_1F1352520A34
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Effect of testosterone on immunocompetence, parasite load, and metabolism in the common wall lizard (Podarcis muralis)
Périodique
Canadian Journal of Zoology
Auteur(s)
Oppliger Anne, Giorgi Maude S., Conelli Alberto, Nembrini Marco, John-Alder Henri
ISSN
0008-4301
Statut éditorial
Publié
Date de publication
2004
Peer-reviewed
Oui
Volume
82
Numéro
11
Pages
1713-1719
Langue
anglais
Notes
SAPHIRID:64144
Résumé
Testosterone can benefit individual fitness by increasing ornament colour, aggressiveness, and sperm quality, but it can also impose both metabolic and immunological costs. However, evidence that testosterone causes immuno suppression in freely living populations is scant. We studied the effects of testosterone on one component of the immune system (i.e., the cell-mediated response to phytohaemagglutinin), parasite load, and metabolic rate in the common wall lizard, Podarcis muralis (Laurenti, 1768). For analyses of immunocompetence and parasitism, male lizards were implanted at the end of the breeding season with either empty or testosterone implants and were returned to their site of capture for 5-6 weeks before recapture. For analyses of the effects of testosterone on metabolic rate, male lizards were captured and implanted before hibernation and were held in the laboratory for 1 week prior to calorimetry. Experimental treatment with testosterone decreased the cell-mediated response to the T-cell mitogen phytohemagglutinin and increased mean metabolic rate. No effects of testosterone on the number of ectoparasites, hemoparasites, and resting metabolic rate could be detected. These results are discussed in the framework of the immunocompetence handicap hypothesis and the immuno-redistribution process hypothesis. [Authors]
Web of science
Création de la notice
12/05/2009 12:43
Dernière modification de la notice
20/08/2019 12:55
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