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Título : Nematode parasites reduce carotenoid-based signalling in male red grouse
Autor : Martínez-Padilla, Jesús ; Mougeot, François ; Pérez-Rodríguez, Lorenzo ; Bortolotti, Gary R.
Palabras clave : Carotenoids
Comb
Nematodes
Red grouse Lagopus lagopus scoticus
Trichostrongylus tenuis
Fecha de publicación : 30-ene-2007
Editor: Royal Society (Great Britain)
Citación : Biol. Lett. 3(2): 161-164 (2007)
Resumen: Carotenoids determine the yellow–red colours of many ornaments, which often function as signals of quality. Carotenoid-based signalling may reliably advertise health and should be particularly sensitive to parasite infections. Nematodes are among the commonest parasites of vertebrates, with well-documented negative effects on their hosts. However, to date, little is known about the effects that these parasites may have on carotenoid-based signalling. Tetraonid birds (grouse) exhibit supra-orbital combs, which are bright integumentary ornaments pigmented by carotenoids. We tested the effect of the nematode parasite Trichostrongylus tenuis on signalling in free-living male red grouse Lagopus lagopus scoticus. We show that experimentally reduced nematode infection increases plasma carotenoid concentration and comb redness, demonstrating for the first time that nematodes can influence carotenoid-based signals.
Descripción : 4 pages.-- PMCID: PMC2375928.-- Printed version published on April 22, 2007.-- Electronic supplementary material available: Comb colour measurements, Parasite counts and Additional results and references.
Versión del editor: http://dx.doi.org/10.1098/rsbl.2006.0593
URI : http://hdl.handle.net/10261/7765
DOI: 10.1098/rsbl.2006.0593
ISSN: 1744-9561
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