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Horst Bleckmann1

  • 1Institut für Zoologie der Rheinischen Friedrich-Wilhelms-Universität Bonn, Poppelsdorfer Schloss, D-53115 Bonn, Germany. bleckmann@uni-bonn.de

Journal of Physiology, Paris
|October 13, 2004
PubMed
Summary

Fish use their inner ear and lateral line system to detect and locate sound sources. These sensory systems enable fish to determine sound direction and distance, aiding in prey detection and navigation.

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Area of Science:

  • * Ichthyology
  • * Bioacoustics
  • * Sensory Biology

Background:

  • * Fish possess sophisticated sensory systems for detecting sound in aquatic environments.
  • * The inner ear and lateral line are key mechanosensory systems involved in auditory perception.
  • * Specialized structures enhance sound detection in certain fish species ('hearing specialists').

Purpose of the Study:

  • * To elucidate the mechanisms by which fish detect and localize sound sources.
  • * To differentiate the roles of the inner ear and lateral line in acoustic sensing.
  • * To explore how fish utilize sensory input for navigation and prey detection.

Main Methods:

  • * Review of existing literature on fish auditory systems.
  • * Analysis of the biophysical principles underlying sound detection by the inner ear and lateral line.

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  • * Examination of behavioral studies demonstrating sound localization and prey tracking in fish.

    • Main Results:

    • * The inner ear detects sound via inertial response to water displacement and, in specialists, to sound pressure.
    • * The lateral line senses water motion relative to the fish and local pressure gradients.
    • * Combined acoustic and lateral line input allows fish to determine sound source direction and distance.
    • * Piscivorous fish use lateral line input to track prey wakes, even in darkness.

    Conclusions:

    • * Fish employ a combination of inner ear and lateral line inputs for effective sound source localization.
    • * The lateral line system plays a crucial role in detecting hydrodynamic trails of prey.
    • * These sensory mechanisms are vital for fish survival, particularly for predation and navigation.