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Olfactory sensitivity for aliphatic esters in spider monkeys (Ateles geoffroyi).

Laura Teresa Hernandez Salazar1, Matthias Laska, Ernesto Rodriguez Luna

  • 1Instituto de Neuro-Etologia, Universidad Veracruzana, Xalapa, Mexico.

Behavioral Neuroscience
|December 17, 2003
PubMed
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Spider monkeys possess high olfactory sensitivity for aliphatic esters, detecting concentrations below 1 part per million (ppm). Their scent detection abilities rival or surpass those of rats, mice, and dogs.

Area of Science:

  • Primate Olfaction
  • Sensory Neuroscience
  • Animal Behavior

Background:

  • Olfactory sensitivity varies significantly across species.
  • Neuroanatomical features are often used to predict olfactory performance, but this can be unreliable.
  • Spider monkeys (Ateles geoffroyi) are primates with less-studied olfactory capabilities.

Purpose of the Study:

  • To investigate the olfactory sensitivity of spider monkeys to aliphatic esters.
  • To compare their olfactory performance to other mammalian species.
  • To evaluate the predictive power of neuroanatomy for olfactory abilities.

Main Methods:

  • A conditioning paradigm was employed to test olfactory discrimination.
  • Three spider monkeys were exposed to a homologous series of aliphatic esters and their isomers.

Related Experiment Videos

  • Detection thresholds were determined for various odorants, including concentrations below 1 part per million (ppm).

    • Main Results:

    • Spider monkeys demonstrated significant olfactory discrimination at concentrations below 1 ppm for all tested odorants.
    • Individual monkeys exhibited detection thresholds below 1 part per billion (ppb) for some substances.
    • The olfactory sensitivity of spider monkeys for aliphatic esters was found to be comparable or superior to that of rats, mice, and dogs.

    Conclusions:

    • Spider monkeys possess a highly developed sense of smell for aliphatic esters.
    • Olfactory performance does not solely depend on neuroanatomical comparisons between species.
    • These findings challenge the assumption that brain structure accurately predicts olfactory capabilities across diverse species.