Carotenoid trade-off between parasitic resistance and sexual display: an experimental study in the blackbird (Turdus merula)
| Autor: | Bruno Faivre, Maria Gaillard, R. Baeta, Jérôme Moreau, Sébastien Motreuil |
|---|---|
| Přispěvatelé: | Biogéosciences [Dijon] ( BGS ), AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ) |
| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
Male
MESH : Host-Parasite Interactions MESH : Analysis of Variance Trade-off medicine.disease_cause Songbirds [ SDV.BBM.BC ] Life Sciences [q-bio]/Biochemistry Molecular Biology/Biomolecules [q-bio.BM] [ SDV.EE.IEO ] Life Sciences [q-bio]/Ecology environment/Symbiosis Parasite hosting bill colour Carotenoid General Environmental Science trade-off chemistry.chemical_classification Pigmentation MESH : Pigmentation Beak carotenoids food and beverages MESH : Isospora General Medicine Isospora General Agricultural and Biological Sciences Research Article [ SDV.MP.PAR ] Life Sciences [q-bio]/Microbiology and Parasitology/Parasitology MESH : Male Zoology Intestinal parasite Biology Parasitic infection General Biochemistry Genetics and Molecular Biology Host-Parasite Interactions Coccidia Botany medicine Animals Body Weights and Measures MESH : Dietary Supplements MESH : Songbirds MESH : Carotenoids Analysis of Variance General Immunology and Microbiology organic chemicals coccidia MESH : Body Weights and Measures biology.organism_classification MESH : Beak chemistry experimental infection Dietary Supplements MESH : Animals |
| Zdroj: | Proceedings of the Royal Society B: Biological Sciences Proceedings of the Royal Society B: Biological Sciences, Royal Society, The, 2008, 275 (1633), pp.427-434. 〈10.1098/rspb.2007.1383〉 |
| ISSN: | 0962-8452 |
| DOI: | 10.1098/rspb.2007.1383〉 |
| Popis: | Many parasites depress the expression of the carotenoid-based colour displays of their hosts, and it has been hypothesized that animals face a trade-off in carotenoid allocation between immune functions and ‘degree of ornamentation’. While numerous correlative studies suggest that parasite infection decreases the intensity of carotenoid-based colour displays, the existence of this trade-off has never been demonstrated experimentally in a host–parasite model. In this study, we used the blackbird ( Turdus merula ) and Isospora (an intestinal parasite) to assess whether this trade-off does indeed exist. Blackbirds were supplemented with carotenoids while simultaneously being exposed to parasites. Supplemented males circulated more carotenoids in the blood and developed more brightly coloured bills than unsupplemented males. In addition, supplementation slowed down the replication rate of parasites. Supplementation with carotenoids enabled infected birds to maintain their bill coloration, whereas birds that were infected but not supplemented showed reduced bill coloration. At the same time, infection slowed carotenoid assimilation in the blood. Overall, we demonstrated that bill colour reflects a bird's health, and that only males with a carotenoid-rich diet are capable of coping with costs associated with parasitic infection. Carotenoids are thus traded off between host physiological response to parasites and secondary sexual traits. Further investigations are required to determine the physiological mechanisms that govern this trade-off. |
| Databáze: | OpenAIRE |
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