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Related Concept Videos

Vision01:24

Vision

48.6K
Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
48.6K
Visual System01:26

Visual System

2.3K
Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...
2.3K

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Updated: May 2, 2026

Using Optical Coherence Tomography and Optokinetic Response As Structural and Functional Visual System Readouts in Mice and Rats
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Using Optical Coherence Tomography and Optokinetic Response As Structural and Functional Visual System Readouts in Mice and Rats

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Ips typographus vision system: a comprehensive study.

Giuseppe Morgante1, Gregor Belušič2, Marko Ilić2

  • 1Department DAFNAE, University of Padova, Viale dell'Università, 16, Legnaro, Italy. giuseppe.morgante@phd.unipd.it.

Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
|September 27, 2024
PubMed
Summary

The Eurasian spruce bark beetle, Ips typographus, has a UV-VIS dichromatic visual system, preferring UV light and high-intensity visible light. Understanding this vision is key to developing new monitoring and management strategies for this forest pest.

Keywords:
Bark beetleBehaviourElectroretinographyLightOpsinScolytinae

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Area of Science:

  • Entomology
  • Forest Ecology
  • Sensory Biology

Background:

  • The Eurasian spruce bark beetle (Ips typographus) is a significant forest pest causing economic damage.
  • Understanding Ips typographus' visual perception is crucial for developing effective pest management strategies.
  • Current knowledge of Ips typographus' vision, including host plant recognition, is limited.

Purpose of the Study:

  • To investigate the visual system of Ips typographus.
  • To explore the potential of visual cues for monitoring and managing Ips typographus outbreaks.
  • To understand the role of vision in the navigation and host selection of Ips typographus.

Main Methods:

  • Morphological analysis of compound eyes.
  • Electroretinography (ERG) to determine spectral sensitivity.
  • Molecular analysis of opsin genes.
  • Behavioral tests (Y-maze) to assess wavelength preference.

Main Results:

  • Electroretinography revealed two photoreceptor classes maximally sensitive to UV (370 nm) and green (530 nm) light.
  • Two opsin genes corresponding to these sensitivities were identified.
  • Behavioral tests showed a consistent preference for UV light over visible (VIS) light, regardless of intensity.
  • A preference for high-intensity VIS light over low-intensity VIS light was observed.

Conclusions:

  • Ips typographus possesses a UV-VIS dichromatic visual system.
  • This visual system influences host selection and navigation in forest canopies.
  • Findings can inform the development of novel, visually-guided monitoring and trapping systems for Ips typographus.
  • Understanding beetle vision offers new avenues for managing forest pest outbreaks.