Does the syrinx, a peripheral structure, constrain effects of sex steroids on behavioral sex reversal in adult canaries?

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dc.contributor.authordos Santos, Ednei B.
dc.contributor.authorLogue, David M.
dc.contributor.authorBall, Gregory F.
dc.contributor.authorCornil, Charlotte A.
dc.contributor.authorBalthazart, Jacques
dc.date.accessioned2024-09-26T21:01:03Z
dc.date.available2024-09-26T21:01:03Z
dc.date.issued2023
dc.descriptionAccepted author manuscript
dc.description.abstractWe previously confirmed that effects of testosterone (T) on singing activity and on the volume of brain song control nuclei are sexually differentiated in adult canaries: females are limited in their ability to respond to T as males do. Here we expand on these results by focusing on sex differences in the production and performance of trills, i.e., rapid repetitions of song elements. We analyzed >42,000 trills recorded over a period of 6 weeks from 3 groups of castrated males and 3 groups of photoregressed females that received Silasticâ„¢ implants filled with T, T plus estradiol or left empty as control. Effects of T on the number of trills, trill duration and percent of time spent trilling were all stronger in males than females. Irrespective of endocrine treatment, trill performance assessed by vocal deviations from the trill rate versus trill bandwidth trade-off was also higher in males than in females. Finally, inter-individual differences in syrinx mass were positively correlated with specific features of trills in males but not in females. Given that T increases syrinx mass and syrinx fiber diameter in males but not in females, these data indicate that sex differences in trilling behavior are related to sex differences in syrinx mass and syrinx muscle fiber diameter that cannot be fully suppressed by sex steroids in adulthood. Sexual differentiation of behavior thus reflects organization not only of the brain but also of peripheral structures.
dc.description.peer-reviewYes
dc.identifier.citationdos Santos, E. B., Logue, D. M., Ball, G. F., Cornil, C. A., & Balthazart, J. (2023). Does the syrinx, a peripheral structure, constrain effects of sex steroids on behavioral sex reversal in adult canaries? Hormones and Behavior, 154, Article 105394. https://doi.org/10.1016/j.yhbeh.2023.105394
dc.identifier.urihttps://hdl.handle.net/10133/6918
dc.language.isoen
dc.publisherElsevier
dc.publisher.departmentDepartment of Psychology
dc.publisher.facultyArts and Science
dc.publisher.institutionUniversity of Liege
dc.publisher.institutionUniversity of Lethbridge
dc.publisher.institutionUniversity of Maryland
dc.publisher.urlhttps://doi.org/10.1016/j.yhbeh.2023.105394
dc.subjectSex differences
dc.subjectVocal behavior
dc.subjectSexual differentiation
dc.subjectBehavioral constraints
dc.subjectTestosterone
dc.subjectTrill performance
dc.subjectTrilling behavior
dc.subjectTrills
dc.subject.lcshSongbirds--Vocalization
dc.subject.lcshBirdsongs
dc.titleDoes the syrinx, a peripheral structure, constrain effects of sex steroids on behavioral sex reversal in adult canaries?
dc.typeArticle
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