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Nerve Fibre and Receptor Counts in the Sprat Utriculus and Lateral Line

Published online by Cambridge University Press:  11 May 2009

A. C. G. Best  and
J. A. B. Gray
A. C. G. Best
Affiliation:
The Laboratory, Marine Biological Association, Citadel Hill, Plymouth, PL1 2PB
J. A. B. Gray
Affiliation:
Member of the external scientific staff of the Medical Research Council.
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Extract

INTRODUCTION

It has long been known that the ears of clupeoid fishes differ from most other fish in that they have a gas-containing bony bulla associated with each ear (for references to early work see Allen, Blaxter & Denton, 1976). The expansion and contraction, with changing pressure, of this gas causes liquid to flow in the ear and lateral line (Gray & Denton, 1979; Denton, Gray & Blaxter, 1979) thus causing displacements (Best & Gray, 1980) and excitation (Denton & Gray, 1980) of the utricular maculae; it also causes excitation of the lateral line neuromasts (unpublished). Only a small fraction of the alternating liquid flow from the bullae passes through the pars inferior of the labyrinth (Gray & Denton, 1979). Furthermore, in larvae, when the utricular structures can be seen to move vigorously with an alternating pressure the saccular otolith is not seen to move (Blaxter, Denton & Gray, 1981).

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 62 , Issue 1 , February 1982 , pp. 201 - 213
Copyright
Copyright © Marine Biological Association of the United Kingdom 1982

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