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Sensory Evolution on the ThresholdAdaptations in Secondarily Aquatic Vertebrates$
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J. G. M. Thewissen

Print publication date: 2008

Print ISBN-13: 9780520252783

Published to California Scholarship Online: March 2012

DOI: 10.1525/california/9780520252783.001.0001

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PRINTED FROM CALIFORNIA SCHOLARSHIP ONLINE (www.california.universitypressscholarship.com). (c) Copyright University of California Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CALSO for personal use.date: 20 September 2021

Hearing in Aquatic Mammals

Hearing in Aquatic Mammals

(p.210) (p.211) 13 Hearing in Aquatic Mammals
Sensory Evolution on the Threshold

Sirpa Nummela

University of California Press

This chapter discusses the structure and function of the auditory system in aquatic mammals. It also examines the evolutionary changes of the ear and presents a comparative analysis of hearing in several species of mammals. It begins with a description of the basic features of the auditory system of land mammals, and moves on to the mechanisms of airborne sound transmission and bone conduction. It then describes Fleischer's classification of ears found in land mammals. Finally, it discusses mammalian aquatic ear types and the mechanisms of underwater hearing.

Keywords:   auditory system, aquatic mammals, hearing, land mammals, airborne sound transmission, bone conduction, ear types, underwater hearing

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