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Related Experiment Videos

Functional binocular vision is not dependent on visual experience in the praying mantis.

U Mathis1, S Eschbach, S Rossel

  • 1Institut für Biologie I, Albert-Ludwigs-Universität, Freiburg, Germany.

Visual Neuroscience
|August 1, 1992
PubMed
Summary

In praying mantises, normal binocular vision develops even when one eye is covered during development. This suggests a fixed developmental pathway for binocular vision in these insects.

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Area of Science:

  • Neuroscience
  • Entomology
  • Animal Behavior

Background:

  • Vertebrate spatial vision requires binocular visual experience for normal development.
  • The praying mantis, an invertebrate predator, utilizes binocular disparities for prey localization.

Purpose of the Study:

  • To investigate whether binocular visual experience is essential for developing normal spatial vision in the praying mantis.
  • To determine if the developmental pathway for binocular vision in mantids is fixed or experience-dependent.

Main Methods:

  • Mantids were raised with one eye occluded throughout their developmental period.
  • Adult mantids were tested for monocular visual fixation and binocular distance estimation capabilities.

Main Results:

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  • Monocularly reared mantids exhibited normally functional visual fixation.
  • Prey-catching behavior in adult mantids was also found to be normally functional despite monocular rearing.

Conclusions:

  • Binocular vision in praying mantises is not dependent on binocular visual experience during development.
  • The development of binocular vision in mantids follows a fixed developmental mode, unlike in vertebrates.