Successful hunting increases testosterone and cortisol in a subsistence population

Benjamin Trumble, Eric A. Smith, Kathleen A. O'Connor, Hillard S. Kaplan, Michael D. Gurven

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Controversy over the adaptive significance of male hunting in subsistence societies hinges on the relative importance of familial provisioning and mate-quality signalling. This paper examines the proximate and ultimate motivations of hunting behaviour from a neuroendocrine perspective, using salivary testosterone and cortisol data collected before, during and after hunting focal follows from 31 Tsimane hunters aged 18-82 years. Despite circadian declines in hormone levels, testosterone and cortisol of Tsimane hunters increased at the time of a kill, and remained high as successful hunters returned home. Previous studies of hormonal changes during competitions find that high-stakes and success in the presence of relevant audiences result in increased neuroendocrine arousal. If men hunt primarily to provision their families, then an additional audience would not be expected to impact testosterone or cortisol, nor would the size of the animal killed. However, if signalling male quality by 'showing off' was a larger relative driver of men's hunting behaviour, one would expect greater hormonal response in cases where men returned with large sharable kills, especially in the presence of community members. Consistent with provisioning models of male hunting motivation, neither kill size nor encountering an audience of villagers while returning from hunting was associated with hormonal changes for successful hunters.

Original languageEnglish (US)
Article number20131800
JournalProceedings of the Royal Society B: Biological Sciences
Volume281
Issue number1776
DOIs
StatePublished - Dec 11 2013
Externally publishedYes

Fingerprint

testosterone
subsistence
hunting
cortisol
Hydrocortisone
Testosterone
Motivation
Population
Hinges
Arousal
Animals
Hormones
hormones
hormone
hunters
animals
animal

Keywords

  • Cortisol
  • Costly signalling
  • Household-provisioning
  • Hunting
  • Testosterone
  • Tsimane

ASJC Scopus subject areas

  • Medicine(all)
  • Immunology and Microbiology(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Environmental Science(all)
  • Agricultural and Biological Sciences(all)

Cite this

Successful hunting increases testosterone and cortisol in a subsistence population. / Trumble, Benjamin; Smith, Eric A.; O'Connor, Kathleen A.; Kaplan, Hillard S.; Gurven, Michael D.

In: Proceedings of the Royal Society B: Biological Sciences, Vol. 281, No. 1776, 20131800, 11.12.2013.

Research output: Contribution to journalArticle

Trumble, Benjamin ; Smith, Eric A. ; O'Connor, Kathleen A. ; Kaplan, Hillard S. ; Gurven, Michael D. / Successful hunting increases testosterone and cortisol in a subsistence population. In: Proceedings of the Royal Society B: Biological Sciences. 2013 ; Vol. 281, No. 1776.
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