Pre-GnRH and GnRH-induced testosterone levels do not vary across behavioral contexts: a role for individual variation

Highlights • Repeatability of hormones might underlie repeatability of behavior. • We conducted GnRH challenges and measured initial and GnRH-induced testosterone. • Individuals varied significantly in initial testosterone levels. • GnRH-induced testosterone levels were repeatable across behavioral...

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Bibliographic Details
Published in:General and comparative endocrinology 2017-05, Vol.246, p.51-62
Main Authors: Ambardar, Medhavi, Grindstaff, Jennifer L
Format: Article
Language:English
Subjects:
Aggression
Aggression - drug effects
Aggression - physiology
Animals
Behavior, Animal - drug effects
Challenge Hypothesis
Eastern bluebird
Endocrinology & Metabolism
Female
Gonadotropin-releasing hormone
Gonadotropin-Releasing Hormone - pharmacology
Male
Nesting Behavior - drug effects
Nesting Behavior - physiology
Parental care
Repeatability
Songbirds - metabolism
Testosterone - blood
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Summary:Highlights • Repeatability of hormones might underlie repeatability of behavior. • We conducted GnRH challenges and measured initial and GnRH-induced testosterone. • Individuals varied significantly in initial testosterone levels. • GnRH-induced testosterone levels were repeatable across behavioral contexts. • Parental care and nest defense were not related to testosterone levels.
ISSN:0016-6480
1095-6840
DOI:10.1016/j.ygcen.2017.03.009