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Related Experiment Videos

Sex pheromones in snakes.

R T Mason1, H M Fales, T H Jones

  • 1Laboratory of Chemistry, National Heart, Lung, and Blood Institute, Bethesda, MD 20892.

Science (New York, N.Y.)
|July 21, 1989
PubMed
Summary

Researchers identified nonvolatile pheromones in garter snakes. Female garter snakes use methyl ketones for attractiveness, while males use squalene for recognition, confirming their biological activity.

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Area of Science:

  • Chemical Ecology
  • Vertebrate Endocrinology

Background:

  • Pheromones are crucial for animal communication, particularly in insects.
  • Nonvolatile pheromones are less understood, especially in vertebrates.
  • Garter snakes (Thamnophis sirtalis parietalis) utilize pheromones for mating behaviors.

Purpose of the Study:

  • To identify and characterize the nonvolatile sex pheromones used by male and female garter snakes.
  • To investigate the chemical composition of female sex attractiveness and male sex recognition pheromones.

Main Methods:

  • Isolation and chemical identification of pheromone compounds from garter snakes.
  • Partial synthesis of identified pheromone compounds.
  • Field tests to assess the biological activity of synthesized pheromones.

Main Results:

  • The female sex attractiveness pheromone comprises a novel series of nonvolatile saturated and monounsaturated long-chain methyl ketones.
  • The male sex recognition pheromone was identified as squalene.
  • Field tests confirmed the biological activity of these identified compounds in mediating garter snake sexual behavior.

Conclusions:

  • This study reveals novel nonvolatile pheromones in a vertebrate species.
  • Methyl ketones and squalene play distinct roles in garter snake reproductive communication.
  • The findings contribute to understanding chemical signaling in vertebrate mating systems.

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