Unknown

Dataset Information

0

Frequency-dependent physiological trade-offs between competing colour morphs.


ABSTRACT: 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, especially towards the relative density of their own aggressive morph, exhibiting high stress responses and immunosuppression in socially competitive environments. In contrast, the non-aggressive black-headed males follow a more passive strategy that appears to buffer them against social stresses. The differential effect of hormones on aggressive behaviour and immune performance reinforces the contrasting behavioural strategies employed by these colour morphs, and highlights the importance of the social environment in determining the individual basis of behavioural and physiological responses.

SUBMITTER: Pryke SR 

PROVIDER: S-EPMC2391178 | BioStudies | 2007-01-01

REPOSITORIES: biostudies

Similar Datasets

2019-01-01 | S-EPMC6447166 | BioStudies
2018-01-01 | S-EPMC6191701 | BioStudies
2016-01-01 | S-EPMC4806697 | BioStudies
2019-01-01 | S-EPMC6478913 | BioStudies
2014-01-01 | S-EPMC4173695 | BioStudies
2015-01-01 | S-EPMC4574365 | BioStudies
1000-01-01 | S-EPMC5147959 | BioStudies
2003-01-01 | S-EPMC193779 | BioStudies
2012-01-01 | S-EPMC3497153 | BioStudies
2019-03-01 | GSE125295 | GEO