La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Male-biased parasitism by common helminths is not explained by sex differences in body size or spleen mass of breeding cormorants Phalacrocorax auritus
Auteurs :	Stacey A. Robinson, Auteur ; Mark R. Forbes, Auteur ; Craig E. Hebert, Auteur ; J. Daniel McLaughlin, Auteur
Type de document :	Article
Dans :	Journal of Avian Biology (39(3) MAY 2008)
Article en page(s) :	272-276
Langues:	Anglais
Résumé :	In vertebrates, males are often more parasitised than conspecific females. This bias in parasitism might result from sex differences in parasite exposure and/or susceptibility to infection. Such information is important for testing hypotheses about allocation of resources to life histories of males and females and for testing hypotheses about factors thought to influence parasite fitness and parasite dynamics. We tested whether double-crested cormorants Phalacrocorax auritus exhibit male-biased parasitism by gut helminths. The prevalence of nematode Contracaecum spp. and trematode Drepanocaphalus spathans infections was similar to 90% and 39%, respectively. Cestode, primarily Paradilepis caballeroi and acanthocephalan Andracantha gravida infections were less common (

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