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Vol. 73, No. 2-3, 2002
Issue release date: March–June 2002 (August 2002)
Section title: Reviewed Article
Folia Primatol 2002;73:70–94
(DOI:10.1159/000064786)

The Functions of Laryngeal Air Sacs in Primates: A New Hypothesis

Hewitt G. · MacLarnon A. · Jones K.E.
University of Surrey Roehampton, London, UK

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Article / Publication Details

First-Page Preview
Abstract of Reviewed Article

Received: 10/30/2000
Accepted: 4/19/2002
Published online: 8/29/2002
Issue release date: March–June 2002 (August 2002)

Number of Print Pages: 25
Number of Figures: 5
Number of Tables: 0

ISSN: 0015-5713 (Print)
eISSN: 1421-9980 (Online)

For additional information: http://www.karger.com/FPR

Abstract

A possible function of laryngeal air sacs in apes and gibbons was investigated by examining the relationships between air sac distribution, call rate, call duration and body weight in a phylogenetic context. The results suggest that lack of sacs in the smaller gibbons and in humans is a derived feature. Call parameters in primates, such as rate and duration, scaled to resting breathing rate (and therefore to body weight) only in species without air sacs, which appear to modify these relationships. Apes and larger gibbons may be able to produce fast extended call sequences without the risk of hyperventilating because they can re-breathe exhaled air from their air sacs. Humans may have lost air sacs during their evolutionary history because they are able to modify their speech breathing patterns and so reduce any tendency to hyperventilate.


  

Author Contacts

Dr. Gwen Hewitt, School of Life Sciences
University of Surrey Roehampton, West Hill
London, SW15 3SN (UK)
Tel. +44 20 8392 3524, Fax +44 20 8392 3527
E‐Mail g.hewitt@roehampton.ac.uk

  

Article Information

Received: Received: October 30, 2000
Accepted after revision: April 19, 2002
Number of Print Pages : 25
Number of Figures : 5, Number of Tables : 0, Number of References : 106

  

Publication Details

Folia Primatologica (International Journal of Primatology)
Founded in 1963 by J. Biegert, H. Hofer, A.H. Schultz and D. Starck; Continued 1975 by J. Biegert (1975–1986), R.D. Martin (1987–1994)
Official Journal of the European Federation for Primatology

Vol. 73, No. 2-3, Year 2002 (Cover Date: March-June 2002 (Released August 2002))

Journal Editor: R.H. Crompton, Liverpool
ISSN: 0015–5713 (print), 1421–9980 (Online)

For additional information: http://www.karger.com/journals/fpr


Article / Publication Details

First-Page Preview
Abstract of Reviewed Article

Received: 10/30/2000
Accepted: 4/19/2002
Published online: 8/29/2002
Issue release date: March–June 2002 (August 2002)

Number of Print Pages: 25
Number of Figures: 5
Number of Tables: 0

ISSN: 0015-5713 (Print)
eISSN: 1421-9980 (Online)

For additional information: http://www.karger.com/FPR


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