Uropygial gland size and composition varies according to experimentally modified microbiome in Great tits.

ABSTRACT:

Background

Parasites exert important selective pressures on host life history traits. In birds, feathers are inhabited by numerous microorganisms, some of them being able to degrade feathers or lead to infections. Preening feathers with secretions of the uropygial gland has been found to act as an antimicrobial defence mechanism, expected to regulate feather microbial communities and thus limit feather abrasion and infections. Here, we used an experimental approach to test whether Great tits (Parus major) modify their investment in the uropygial gland in response to differences in environmental microorganisms.

Results

We found that males, but not females, modified the size of their gland when exposed to higher bacterial densities on feathers. We also identified 16 wax esters

SUBMITTER: Jacob S 

PROVIDER: S-EPMC4074404 | biostudies-literature | 2014 Jun

REPOSITORIES: biostudies-literature