Behavioral Ecology and Sociobiology

, Volume 67, Issue 9, pp 1457–1469 | Cite as

Signaling in multiple modalities in male rhesus macaques: sex skin coloration and barks in relation to androgen levels, social status, and mating behavior

  • James P. Higham
  • Dana Pfefferle
  • Michael Heistermann
  • Dario Maestripieri
  • Martin Stevens
Original Paper

Abstract

The past decade has seen an increasing shift in animal communication towards more studies that incorporate aspects of signaling in multiple modalities. Although nonhuman primates are an excellent group for studying the extent to which different aspects of condition may be signaled in different modalities, and how such information may be integrated during mate choice, very few studies of primate species have incorporated such analyses. Here, we present data from free-ranging male rhesus macaques on sex skin coloration (modeled to receiver perception), bark vocal signals, androgen levels, morphometric variables, dominance status, and female mate choice. We show that, consistent with data on females, most intra- and interindividual variation in sex skin appearance occurs in luminance rather than color. Sex skin luminance was significantly correlated across different skin regions. Sex skin luminance did not correlate with the majority of bark parameters, suggesting the potential for the two signals to convey different information. Sex skin appearance was not related to androgen levels although we found some evidence for links between androgen levels and bark parameters, several of which were also related to morphometric variables. We found no evidence that either signal was related to male dominance rank or used in female mate choice, though more direct measures of female proceptive behavior are needed. Overall, the function of male sex skin coloration in this species remains unclear. Our study is among the first nonhuman primate studies to incorporate measurements of multiple signals in multiple modalities, and we encourage other authors to incorporate such analyses into their work.

Keywords

Coloration Luminance Vocal signals Multimodal Primate Rhesus macaques 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • James P. Higham
    • 1
    • 2
  • Dana Pfefferle
    • 3
    • 4
  • Michael Heistermann
    • 5
  • Dario Maestripieri
    • 1
  • Martin Stevens
    • 6
  1. 1.Institute for Mind and BiologyUniversity of ChicagoChicagoUSA
  2. 2.Department of AnthropologyNew York UniversityNew YorkUSA
  3. 3.Behavioural Ecology Research Group, Institute of BiologyUniversity of LeipzigLeipzigGermany
  4. 4.Junior Research Group of Primate Kin Selection, Department of PrimatologyMax-Planck Institute for Evolutionary AnthropologyLeipzigGermany
  5. 5.Endocrinology LaboratoryGerman Primate CentreGöttingenGermany
  6. 6.Department of ZoologyUniversity of CambridgeCambridgeUK
  7. 7.Centre for Ecology & ConservationUniversity of ExeterPenrynUK

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