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The Biology of Sharks and Rays$
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Peter A. Klimley and Steven Oerding

Print publication date: 2013

Print ISBN-13: 9780226442495

Published to Chicago Scholarship Online: January 2014

DOI: 10.7208/chicago/9780226923086.001.0001

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PRINTED FROM CHICAGO SCHOLARSHIP ONLINE (www.chicago.universitypressscholarship.com). (c) Copyright University of Chicago Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CHSO for personal use.date: 16 January 2022

Sense of Hearing: Mechanoreception

Sense of Hearing: Mechanoreception

(p.153) Chapter 7 Sense of Hearing: Mechanoreception
The Biology of Sharks and Rays

A. Peter Klimley

University of Chicago Press

This chapter discusses how sharks, rays, and chimaeras are able to locate their prey and avoid predators from large distances. This sense is called mechanoreception because mechanical disturbances of the water are detected by two organ systems. The free neuromasts, canal neuromasts, and vessels of Savi on the external body are sensitive to one-way displacements of particles of water. The inner ear is sensitive not only to these displacements but also to two-way displacements of water particles associated with pressure oscillations. The former receptors are active in the near field, where the one-way oscillations exceed the two-way oscillations; the latter receptor is active in both the near and far field, where the two-way oscillations are dominant. The boundary between these fields for a very low frequency of 10 Hz is 150 m while for 100 Hz it is only 15 m.

Keywords:   sharks, rays, chimaeras, low-frequency sounds, mechanoreceptors, pressure oscillation, inner ear, neuromasts, Savi

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