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@article{1552657,
author = {Kotasová Adámková, Marie and Bílková, Zuzana and Tomášek, Oldřich and Šimek, Zdeněk and Albrecht, Tomáš},
article_location = {Hoboken},
article_number = {16},
doi = {http://dx.doi.org/10.1002/ece3.5447},
keywords = {barn swallow; feather corticosterone; feather testosterone; keratinous matrix; liquid chromatography-tandem mass spectrometry; ptilochronology; stress},
language = {eng},
issn = {2045-7758},
journal = {Ecology and Evolution},
title = {Feather steroid hormone concentrations in relation to age, sex, and molting time in a long distance migratory passerine},
url = {https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.5447},
volume = {9},
year = {2019}
}
TY - JOUR
ID - 1552657
AU - Kotasová Adámková, Marie - Bílková, Zuzana - Tomášek, Oldřich - Šimek, Zdeněk - Albrecht, Tomáš
PY - 2019
TI - Feather steroid hormone concentrations in relation to age, sex, and molting time in a long distance migratory passerine
JF - Ecology and Evolution
VL - 9
IS - 16
SP - 9018-9026
EP - 9018-9026
PB - Wiley
SN - 20457758
KW - barn swallow
KW - feather corticosterone
KW - feather testosterone
KW - keratinous matrix
KW - liquid chromatography-tandem mass spectrometry
KW - ptilochronology
KW - stress
UR - https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.5447
L2 - https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.5447
N2 - 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 simultaneous analysis of both hormones from small amounts of feathers (4-25 mg) and, thus, overcomes the problem of insufficient detection limits. We applied this method to reveal associations between T-f and Cort(f) hormone concentrations and feather growth, age, and sex in feathers grown during the postbreeding (flanks) and prebreeding (tails) periods in barn swallows (Hirundo rustica). There was neither a correlation between prebreeding and postbreeding T-f, nor between prebreeding and postbreeding Cort(f). Tail Cort(f) concentrations were negatively associated with tail feather growth rates. Feather hormone concentrations were correlated in the prebreeding period, negatively in males but positively in females. Both Cort(f) and T-f were higher in young birds compared to older ones, indicating either an age-related decrease in hormone concentrations within individuals, or the selective disappearance of individuals with high steroid concentrations. Males and females did not differ in Cort(f), but T-f concentrations were higher in males than females, particularly during the prebreeding period. In this study, we provide an effective method for analyzing hormones in feathers in an ecological context, especially in situations when the total amount of feathers available for the analysis is limited.
ER -
KOTASOVÁ ADÁMKOVÁ, Marie, Zuzana BÍLKOVÁ, Oldřich TOMÁŠEK, Zdeněk ŠIMEK and Tomáš ALBRECHT. Feather steroid hormone concentrations in relation to age, sex, and molting time in a long distance migratory passerine. \textit{Ecology and Evolution}. Hoboken: Wiley, 2019, vol.~9, No~16, p.~9018-9026. ISSN~2045-7758. Available from: https://dx.doi.org/10.1002/ece3.5447.
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