Enzymatic antioxidants but not baseline glucocorticoids mediate the reproduction-survival trade-off in a wild bird.

ABSTRACT: The trade-off between reproductive investment and survival is central to life-history theory, but the relative importance and the complex interactions among the physiological mechanisms mediating it are still debated. Here we experimentally tested whether baseline glucocorticoid hormones, the redox system or their interaction mediate reproductive investment-survival trade-offs in wild great tits (Parus major). We increased the workload of parental males by clipping three feathers on each wing, and 5 days later determined effects on baseline corticosterone concentrations (Cort), redox state (reactive oxygen metabolites, protein carbonyls, glutathione peroxidase [GPx], total non-enzymatic antioxidants), body mass, body condition, reproductive success and survival. Feather-clipping did not af

SUBMITTER: Casagrande S 

PROVIDER: S-EPMC6283945 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature