Document Detail


Auditory role of lateral trunk channels in cobitid fishes.
MedLine Citation:
PMID:  10757243     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
In cobitid fishes the anterior part of the swimbladder is encapsulated by bone to varying extent. This might diminish the auditory sensitivity of these otophysine fishes by reducing the vibrations of the swimbladder wall in the sound field. However, according to prior studies the auditory thresholds of the cobitid Botia modesta is similar to that of other otophysine fishes. According to anatomical investigation B. modesta has a cranial encapsulation of the anterior part of the swimbladder (camera aerea Weberiana) as expected and in addition special channels stretching laterally from the swimbladder to the outer body wall. These lateral trunk channels are filled with fat and lymph. They form a muscle-free acoustic window beneath the skin, which could be demonstrated by measuring the auditory brainstem response at 400 Hz, 800 Hz, 1500 Hz, and 3000 Hz. Filling the lateral trunk channels with wettex (cotton/rayon staple) resulted in an increase of the auditory thresholds by 13.6-17.6 dB, indicating mechanical damping of the swimbladder. Our experiments demonstrate that the intact lateral trunk channels enhance the hearing sensitivity of cobitid fishes.
Authors:
H Kratochvil; F Ladich
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of comparative physiology. A, Sensory, neural, and behavioral physiology     Volume:  186     ISSN:  0340-7594     ISO Abbreviation:  J. Comp. Physiol. A     Publication Date:  2000 Mar 
Date Detail:
Created Date:  2000-06-21     Completed Date:  2000-06-21     Revised Date:  2009-06-04    
Medline Journal Info:
Nlm Unique ID:  8413199     Medline TA:  J Comp Physiol A     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  279-85     Citation Subset:  IM    
Affiliation:
Institute of Zoology, University of Vienna, Austria.
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MeSH Terms
Descriptor/Qualifier:
Air Sacs / physiology*
Animals
Auditory Perception*
Brain Stem / physiology
Fishes / physiology*
Vibration

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