Data/hora: 17/06/2024 04:29:19

Provedor de dados: 	Institutional Archive of Ifreme (ArchiMer)	
País: 	France	
Título: 	Stabilising selection on immune response in male black grouse Lyrurus tetrix	
Autores: 	Soulsbury, Carl D.; Siitari, Heli; Lebigre, Christophe.	
Data: 	2018-02	
Ano: 	2018	
Palavras-chave: 	Ecological immunology; ELISA; Immunocompetance; Life history theory; Stabilising selection.	
Resumo: 	Illnesses caused by a variety of micro- and macro- organisms can negatively affect individuals' fitness, leading to the expectation that immunity is under positive selection. However, immune responses are costly and individuals must trade-off their immune response with other fitness components (e.g. survival or reproductive success) meaning that individuals with intermediate response may have the greatest overall fitness. Such a process might be particularly acute in species with strong sexual selection because the condition-dependence of male secondary sexual-traits might lead to striking phenotypic differences amongst males of different immune response levels. We tested whether there is selection on immune response by survival and reproduction in yearling and adult male black grouse (Lyrurus tetrix) following an immune challenge with a novel antigen and tested the hypothesis that sexual signals and body mass are honest signals of the immune response. We show that yearling males with highest immune response to these challenges had higher survival, but the reverse was true for adults. Adults with higher responses had highest mass loss and adult males with intermediate immune response had highest mating success. Tail length was related to baseline response in adults and more weakly in yearlings. Our findings reveal the complex fitness consequences of mounting an immune response across age classes. Such major differences in the direction and magnitude of selection in multiple fitness components is an alternative route underpinning the stabilising selection of immune responses with an intermediate immune response being optimal.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	http://archimer.ifremer.fr/doc/00426/53761/54653.pdf

DOI:10.1007/s00442-017-4014-1

http://archimer.ifremer.fr/doc/00426/53761/	
Editor: 	Springer	
Formato: 	application/pdf	
Fonte: 	Oecologia (0029-8549) (Springer), 2018-02 , Vol. 186 , N. 2 , P. 405-414	
Fonte: 	The Author(s) 2017. This article is an open access publication

info:eu-repo/semantics/openAccess

restricted use