Ontology highlight
ABSTRACT:
SUBMITTER: Pryke SR
PROVIDER: S-EPMC2391178 | biostudies-literature | 2007 Oct
REPOSITORIES: biostudies-literature
Pryke Sarah R SR Astheimer Lee B LB Buttemer William A WA Griffith Simon C SC
Biology letters 20071001 5
Evolutionary theory suggests that alternative colour morphs (i.e. genetically controlled phenotypes) may derive similar fitness under frequency-dependent selection. Here we experimentally demonstrate opposing effects of frequency-dependent social environments on plasma hormone levels (testosterone and corticosterone) and immune function between red- and black-headed male morphs of the Gouldian finch (Erythrura gouldiae). Red-headed males are highly sensitive to changes in the social environment, ...[more]