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Assessing olfactory performance in a New World primate, Saimiri sciureus

M Laska1, R Hudson

  • 1Institut für Medizinische Psychologie, Ludwig-Maximilians-Universität, München, Germany.

Physiology & Behavior
|January 1, 1993
PubMed
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This study developed a reliable method to assess olfactory performance in squirrel monkeys using a foraging task. This olfactory assessment paradigm can also compare scent abilities between humans and nonhuman primates.

Area of Science:

  • Primatology
  • Neuroscience
  • Sensory Science

Background:

  • Olfactory function is crucial for foraging and social behaviors in many species.
  • Assessing olfactory performance in nonhuman primates has been challenging.
  • Squirrel monkeys (Saimiri sciureus) are widely used models in cognitive and sensory research.

Purpose of the Study:

  • To develop and validate a novel olfactory assessment task for squirrel monkeys.
  • To evaluate the reliability and consistency of olfactory performance in this species.
  • To establish a paradigm for direct olfactory comparisons between human and nonhuman primates.

Main Methods:

  • A foraging task was designed using flip-top vials with odorized strips (S+ for reward, S- for no reward) on a climbing frame.

Related Experiment Videos

  • Three adult female squirrel monkeys performed five 1-min trials daily for 15–25 days to reach an 80% correct choice criterion.
  • The task involved assessing discrimination ability and sensitivity to olfactory stimuli.

    • Main Results:

    • Squirrel monkeys reliably learned to discriminate between rewarding and non-rewarding odor cues.
    • Animals demonstrated rapid learning, stimulus generalization, and long-term memory retention (over 1 month).
    • The task showed high precision and consistency in assessing olfactory function.

    Conclusions:

    • The developed olfactory foraging task provides a reliable method for assessing olfactory performance in squirrel monkeys.
    • This paradigm is suitable for studying olfactory abilities and their neural underpinnings in nonhuman primates.
    • The task's adaptability allows for direct comparative studies of olfactory function across species, including humans.