Feather steroid hormone concentrations in relation to age, sex, and molting time in a long-distance migratory passerine.

ABSTRACT: In birds, concentrations of testosterone (T) and corticosterone (Cort) are closely connected with many morphological, behavioral, and other physiological traits, including reproduction, metabolism, immunity, and fitness. The direction of the effect of these hormones on above-mentioned traits, and the potential feedback between hormones are in general unclear; in addition, knowledge on how age and sex can affect T and Cort concentrations is still inconsistent. Our study used a novel method to analyze testosterone and corticosterone in feathers (T_f, Cort_f) based on the precolumn chemical derivatization of hormones before liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis. Unlike previously used methods (RIA, EIA), our analytical procedure allows simultan

SUBMITTER: Adamkova M 

PROVIDER: S-EPMC6706234 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature