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  Differential effects of testosterone, dihydrotestosterone and estradiol on carotenoid deposition in an avian sexually selected signal

Casagrande, S., Dijkstra, C., Tagliavini, J., Goerlich, V. C., & Groothuis, T. G. G. (2011). Differential effects of testosterone, dihydrotestosterone and estradiol on carotenoid deposition in an avian sexually selected signal. Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology, 197(1), 1-13. doi:10.1007/s00359-010-0579-4.

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 Creators:
Casagrande, Stefania1, Author              
Dijkstra, Cor, Author
Tagliavini, James, Author
Goerlich, Vivian C., Author
Groothuis, Ton G. G., Author
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1University of Groningen, The Netherlands , ou_persistent22              

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Free keywords: Animals Body Constitution Body Constitution: drug effects Body Mass Index Carotenoids Carotenoids: metabolism Cholesterol Cholesterol: blood Chromatography, High Pressure Liquid Chromatography, High Pressure Liquid: methods Columbidae Dihydrotestosterone Dihydrotestosterone: pharmacology Estradiol Estradiol: pharmacology Female Hormones Hormones: blood Hormones: pharmacology Male Pigmentation Pigmentation: drug effects Radioimmunoassay Radioimmunoassay: methods Random Allocation Sex Characteristics Sexual Behavior, Animal Sexual Behavior, Animal: drug effects Sexual Behavior, Animal: physiology Steroids Steroids: blood Testosterone Testosterone: pharmacology Up-Regulation Up-Regulation: drug effects
 Abstract: Recent studies have demonstrated that carotenoid-based traits are under the control of testosterone (T) by up-regulation of carotenoid carriers (lipoproteins) and/or tissue-specific uptake of carotenoids. T can be converted to dihydrotestosterone (DHT) and estradiol (E2), and variation in conversion rate may partly explain some contradictory findings in the literature. Moreover, most studies on the effect of T on sexual signals have focused on the male sex only, while in many species females show the same signal, albeit to a lesser extent. We studied the effects of T, DHT, and E2 treatment in male and female diamond doves Geopelia cuneata in which both sexes have an enlarged red eye ring, which is more pronounced in males. We first showed that this periorbital ring contains very high concentration of carotenoids, of which most are lutein esters. Both T and DHT were effective in enhancing hue, UV-chroma and size in both sexes, while E2 was ineffective. However, E2 dramatically increased the concentration of circulating lipoproteins. We conclude that in both sexes both color and size of the secondary sexual trait are androgen dependent. The action of androgens is independent of lipoproteins regulation. Potential mechanisms and their consequences for trade-off are discussed.

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 Dates: 2011
 Publication Status: Published in print
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 Rev. Type: -
 Identifiers: DOI: 10.1007/s00359-010-0579-4
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Title: Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology
  Other : J. Comp. Physiol. A -Neuroethol. Sens. Neural Behav. Physiol.
Source Genre: Journal
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Publ. Info: Heidelberg : Springer Verlag
Pages: - Volume / Issue: 197 (1) Sequence Number: - Start / End Page: 1 - 13 Identifier: ISSN: 0340-7594
CoNE: https://pure.mpg.de/cone/journals/resource/954925519626