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Related Concept Videos

Olfaction01:25

Olfaction

The sense of smell is achieved through the activities of the olfactory system. It starts when an airborne odorant enters the nasal cavity and reaches olfactory epithelium (OE). The OE is protected by a thin layer of mucus, which also serves the purpose of dissolving more complex compounds into simpler chemical odorants. The size of the OE and the density of sensory neurons varies among species; in humans, the OE is only about 9-10 cm2.
The olfactory receptors are embedded in the cilia of the...

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An Objective and Reproducible Test of Olfactory Learning and Discrimination in Mice
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Olfactory predator recognition in predator-naïve gray mouse lemurs (Microcebus murinus).

Dina Sündermann1, Marina Scheumann, Elke Zimmermann

  • 1Institute of Zoology, University of Veterinary Medicine Hannover, Hannover, Germany.

Journal of Comparative Psychology (Washington, D.C. : 1983)
|May 21, 2008
PubMed
Summary

Gray mouse lemurs show innate antipredator behavior to predator odors. These findings suggest a genetic basis for olfactory predator recognition in primates, potentially linked to meat digestion metabolites.

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Area of Science:

  • Primate behavior
  • Olfactory ecology
  • Predator recognition

Background:

  • Predator olfactory cues trigger antipredator responses in many animals.
  • Information on olfactory predator recognition in primates is limited.
  • Gray mouse lemurs are a key primate model for studying sensory processing.

Purpose of the Study:

  • To investigate olfactory predator recognition in predator-naïve gray mouse lemurs.
  • To determine if predator-related odors elicit antipredator behaviors.
  • To explore the potential genetic basis of olfactory predator detection.

Main Methods:

  • An olfactory experiment exposing captive-born, predator-naïve gray mouse lemurs to feces odors from different predator and non-predator categories.
  • Behavioral responses (avoidance, activity) were quantified via video recording.
  • Odor stimuli were presented at a preferred location where a reward was typically obtained.

Main Results:

  • Mouse lemurs significantly avoided locations associated with predator odors.
  • A notable increase in activity was observed when exposed to carnivore odors compared to non-predator controls.
  • Behavioral responses indicated a clear discrimination between predator and non-predator olfactory cues.

Conclusions:

  • Gray mouse lemurs possess an innate ability to recognize predator olfactory cues.
  • These findings support the hypothesis of a genetic predisposition for olfactory predator recognition in primates.
  • The recognition mechanism may involve the detection of metabolites associated with meat digestion.