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Title: Ecological and physiological variance in T-cell mediated immune response in Cory's shearwaters
Author: Forero, M.G.
González-Solís, Jacob
Igual, J.M.
Hobson, K.A.
Ruiz Gabriel, Xavier
Viscor Carrasco, Ginés
Keywords: Ocells marins
Cèl·lules T
Ecologia marina
Resposta immunitària
Fisiologia animal
Sea birds
T cells
Marine ecology
Immune response
Animal physiology
Issue Date: 2006
Publisher: University of California Press
Abstract: T-cell mediated immune response (CMI) hasbeen widely studied in relation to individual andfitness components in birds. However, few studieshave simultaneously examined individual and socialfactors and habitat-mediated variance in theimmunity of chicks and adults from the samepopulation and in the same breeding season. Weinvestigated ecological and physiological variancein CMI of male and female nestlings and adults in abreeding population of Cory's Shearwaters(Calonectrisdiomedea) in theMediterranean Sea. Explanatory variables includedindividual traits (body condition, carbon andnitrogen stable isotope ratios, plasma totalproteins, triglycerides, uric acid, osmolarity,β-hydroxy-butyrate, erythrocyte meancorpuscular diameter, hematocrit, andhemoglobin) and burrow traits(temperature, isolation, and physicalstructure). During incubation, immune responseof adult males was significantly greater than thatof females. Nestlings exhibited a lower immuneresponse than adults. Ecological and physiologicalfactors affecting immune response differed betweenadults and nestlings. General linear models showedthat immune response in adult males was positivelyassociated with burrow isolation, suggesting thatmales breeding at higher densities suffer immunesystem suppression. In contrast, immune response inchicks was positively associated with bodycondition and plasma triglyceride levels.Therefore, adult immune response appears to beassociated with social stress, whereas a trade-offbetween immune function and fasting capability mayexist for nestlings. Our results, and those fromprevious studies, provide support for anasymmetrical influence of ecological andphysiological factors on the health of differentage and sex groups within a population, and for theimportance of simultaneously considering individualand population characteristics in intraspecificstudies of immune response.
Note: Reproducció del document publicat a:[865:EAPVIT]2.0.CO;2
It is part of: The Condor, 2006, vol. 108, num. 4, p. 865-876
Related resource:[865:EAPVIT]2.0.CO;2
ISSN: 0010-5422
Appears in Collections:Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)
Articles publicats en revistes (Biologia Cel·lular, Fisiologia i Immunologia)

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