Enduring voice recognition in bonobos

Sumir Keenan, Nicolas Mathevon, Jeroen M. G. Stevens, Jean Pascal Guéry, Klaus Zuberbühler, Florence Levréro

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)
2 Downloads (Pure)

Abstract

Long-term social recognition is vital for species with complex social networks, where familiar individuals can encounter one another after long periods of separation. For non-human primates who live in dense forest environments, visual access to one another is often limited, and recognition of social partners over distances largely depends on vocal communication. Vocal recognition after years of separation has never been reported in any great ape species, despite their complex societies and advanced social intelligence. Here we show that bonobos, Pan paniscus, demonstrate reliable vocal recognition of social partners, even if they have been separated for five years. We experimentally tested bonobos' responses to the calls of previous group members that had been transferred between captive groups. Despite long separations, subjects responded more intensely to familiar voices than to calls from unknown individuals - the first experimental evidence that bonobos can identify individuals utilising vocalisations even years after their last encounter. Our study also suggests that bonobos may cease to discriminate between familiar and unfamiliar individuals after a period of eight years, indicating that voice representations or interest could be limited in time in this species.

Original languageEnglish
Article number22046
Number of pages8
JournalScientific Reports
Volume6
DOIs
Publication statusPublished - 25 Feb 2016

Keywords

  • Animal behaviour
  • Ecology

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