@article{Elderbrock2021stero-52696,
  year={2021},
  doi={10.1016/j.yhbeh.2020.104900},
  title={Sex steroids modulate circadian behavioral rhythms in captive animals, but does this matter in the wild?},
  volume={128},
  issn={0018-506X},
  journal={Hormones and Behavior},
  author={Elderbrock, Emily K. and Hau, Michaela and Greives, Timothy J.},
  note={Article Number: 104900}
}

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    <dc:contributor>Greives, Timothy J.</dc:contributor>
    <dc:creator>Greives, Timothy J.</dc:creator>
    <dcterms:title>Sex steroids modulate circadian behavioral rhythms in captive animals, but does this matter in the wild?</dcterms:title>
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    <dc:contributor>Hau, Michaela</dc:contributor>
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    <dc:contributor>Elderbrock, Emily K.</dc:contributor>
    <dc:creator>Hau, Michaela</dc:creator>
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    <dc:creator>Elderbrock, Emily K.</dc:creator>
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    <dcterms:abstract xml:lang="eng">Nearly all organisms alter physiological and behavioral activities across the twenty-four-hour day. Endogenous timekeeping mechanisms, which are responsive to environmental and internal cues, allow organisms to anticipate predictable environmental changes and time their daily activities. Among-individual variation in the chronotype, or phenotypic output of these timekeeping mechanisms (i.e. timing of daily behaviors), is often observed in organisms studied under naturalistic environmental conditions. The neuroendocrine system, including sex steroids, has been implicated in the regulation and modulation of endogenous clocks and their behavioral outputs. Numerous studies have found clear evidence that sex steroids modulate circadian and daily timing of activities in captive animals under controlled conditions. However, little is known about how sex steroids influence daily behavioral rhythms in wild organisms or what, if any, implication this may have for survival and reproductive fitness. Here we review the evidence that sex steroids modulate daily timing in vertebrates under controlled conditions. We then discuss how this relationship may be relevant for the reproductive success and fitness of wild organisms and discuss the limited evidence that sex steroids modulate circadian rhythms in wild organisms.</dcterms:abstract>
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