Effects of social status, age, and season on androgen and cortisol levels in wild male golden lion tamarins (Leontopithecus rosalia)

Karen L. Bales, Jeffrey A. French, Jennifer McWilliams, Reagan A. Lake, James M. Dietz

Research output: Contribution to journalArticle

68 Citations (Scopus)

Abstract

This study examines factors affecting androgen and cortisol levels in wild, male golden lion tamarins (Leontopithecus rosalia). Golden lion tamarins are a cooperatively breeding species in which groups often contain two potentially breeding males. Brothers frequently emigrate together and develop a clear dominance hierarchy, but interactions between them are primarily affiliative. Duos in which the males are not related are less stable. In addition, reproductive skew theory predicts that dominant males will be less likely to share reproduction with related subordinates. As such, we predicted that both androgens and cortisol would be higher in subordinate males unrelated to the dominant male. We also predicted that androgens in breeding males would be higher during the mating season than the birth/infant care season, as per Wingfield's "challenge hypothesis" (1990). Fecal samples were collected from 24 males in 14 social groups and assayed by enzyme immunoassay. Androgen levels were higher in breeding males during the mating season, thus supporting the challenge hypothesis. However, while subordinate males unrelated to the dominant male had significantly lower androgens than any other group, cortisol levels were not correspondingly higher. These results suggest that unrelated subordinate males show measurable reproductive suppression and may use strategies such as infantilization to avert aggression from dominant males.

Original languageEnglish (US)
Pages (from-to)88-95
Number of pages8
JournalHormones and Behavior
Volume49
Issue number1
DOIs
StatePublished - Jan 1 2006

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Leontopithecus
Androgens
Hydrocortisone
Breeding
Social Dominance
Infant Care

Keywords

  • Androgens
  • Challenge hypothesis
  • Cooperative breeding
  • Cortisol
  • Reproductive skew
  • Tamarin

ASJC Scopus subject areas

  • Endocrinology
  • Endocrine and Autonomic Systems
  • Behavioral Neuroscience

Cite this

Effects of social status, age, and season on androgen and cortisol levels in wild male golden lion tamarins (Leontopithecus rosalia). / Bales, Karen L.; French, Jeffrey A.; McWilliams, Jennifer; Lake, Reagan A.; Dietz, James M.

In: Hormones and Behavior, Vol. 49, No. 1, 01.01.2006, p. 88-95.

Research output: Contribution to journalArticle

Bales, Karen L. ; French, Jeffrey A. ; McWilliams, Jennifer ; Lake, Reagan A. ; Dietz, James M. / Effects of social status, age, and season on androgen and cortisol levels in wild male golden lion tamarins (Leontopithecus rosalia). In: Hormones and Behavior. 2006 ; Vol. 49, No. 1. pp. 88-95.
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