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Related Experiment Videos

Can lemurs learn to deceive? A study in the black lemur (Eulemur macaco).

Emilie Genty1, Jean-Jacques Roeder

  • 1Centre d'Ecologie, Physiologie & Ethologie, Centre National de la Recherche Scientifique, Strasbourg, France.

Journal of Experimental Psychology. Animal Behavior Processes
|April 26, 2006
PubMed
Summary

Lemurs exhibit deceptive behaviors, previously unobserved in prosimians. This study demonstrates that black lemurs can alter their communication strategies when faced with competition for rewards.

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Area of Science:

  • Primate behavior
  • Cognitive ethology
  • Animal communication

Background:

  • Deceptive behavior is well-documented in simian primates.
  • Such complex cognitive abilities have not been previously demonstrated in prosimians.
  • This gap highlights a need to investigate deception in a wider range of primate taxa.

Purpose of the Study:

  • To investigate the potential for deceptive behavior in lemurs.
  • To adapt and apply established paradigms for studying deception in simians to lemurs.
  • To determine if lemurs can modify their communication strategies based on social context.

Main Methods:

  • Three black lemurs were trained to communicate reward locations to a cooperative human trainer.
  • A competitive paradigm was introduced where a second trainer competed for the reward.

Related Experiment Videos

  • Lemur behavior was observed and analyzed for changes in communication strategies between cooperative and competitive contexts.

    • Main Results:

    • Lemurs demonstrated differential behavioral adjustments when faced with a competitive trainer.
    • One lemur refused to participate in the competitive task.
    • Another subject withheld information, and a third exhibited deceptive pointing to secure the reward.

    Conclusions:

    • This study provides the first evidence of deceptive behavior in lemurs, a prosimian species.
    • Lemurs possess the cognitive flexibility to adapt their communication based on social dynamics and competition.
    • Findings challenge previous assumptions about the distribution of complex cognitive abilities within primates.