| Oxidative stress and the effect of parasites on a carotenoid-based ornament. | |
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MedLine Citation:
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PMID: 20086124 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Oxidative stress, the physiological condition whereby the production of reactive oxygen and nitrogen species overwhelms the capacity of antioxidant defences, causes damage to key bio-molecules. It has been implicated in many diseases, and is proposed as a reliable currency in the trade-off between individual health and ornamentation. Whether oxidative stress mediates the expression of carotenoid-based signals, which are among the commonest signals of many birds, fish and reptiles, remains controversial. In the present study, we explored interactions between parasites, oxidative stress and the carotenoid-based ornamentation of red grouse Lagopus lagopus scoticus. We tested whether removing nematode parasites influenced both oxidative balance (levels of oxidative damage and circulating antioxidant defences) and carotenoid-based ornamentation. At the treatment group level, parasite purging enhanced the size and colouration of ornaments but did not significantly affect circulating carotenoids, antioxidant defences or oxidative damage. However, relative changes in these traits among individuals indicated that males with a greater number of parasites prior to treatment (parasite purging) showed a greater increase in the levels of circulating carotenoids and antioxidants, and a greater decrease in oxidative damage, than those with initially fewer parasites. At the individual level, a greater increase in carotenoid pigmentation was associated with a greater reduction in oxidative damage. Therefore, an individual's ability to express a carotenoid-based ornament appeared to be linked to its current oxidative balance and susceptibility to oxidative stress. Our experimental results suggest that oxidative stress can mediate the impact of parasites on carotenoid-based signals, and we discuss possible mechanisms linking carotenoid-based ornaments to oxidative stress. |
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Authors:
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F Mougeot; J Martínez-Padilla; J D Blount; L Pérez-Rodríguez; L M I Webster; S B Piertney |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The Journal of experimental biology Volume: 213 ISSN: 1477-9145 ISO Abbreviation: J. Exp. Biol. Publication Date: 2010 Feb |
Date Detail:
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Created Date: 2010-01-20 Completed Date: 2010-03-16 Revised Date: 2010-07-28 |
Medline Journal Info:
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Nlm Unique ID: 0243705 Medline TA: J Exp Biol Country: England |
Other Details:
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Languages: eng Pagination: 400-7 Citation Subset: IM |
Affiliation:
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Estación Experimental de Zonas Aridas, CSIC, General Segura 1, 04001 Almeria, Spain. francois.mougeot@eeza.csic.es |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Antioxidants / metabolism Carotenoids / blood, metabolism* Female Galliformes / anatomy & histology, blood, parasitology*, physiology* Male Malondialdehyde / blood Oxidative Stress / physiology* Parasites / physiology* Pigmentation / physiology* Time Factors Trichostrongylus / physiology |
| Chemical | |
Reg. No./Substance:
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0/Antioxidants; 36-88-4/Carotenoids; 542-78-9/Malondialdehyde |
| Comments/Corrections | |
Erratum In:
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J Exp Biol. 2010 May;213(Pt 10):1796 J Evol Biol. 2010 Jul;23(7):1579 [PMID: 20642635 ] |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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