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SAUROPOD FEEDING HIGH & LOW -Reply



Another factor to consider in assessing selective pressures for long
necks in sauropods is the increase in tracheal dead space and airway
resistance associated with the long neck.  The resultant increased work
of breathing must have been offset by some other very important
advantage that would supply more energy to the creature than the
increased energetic demands of breathing through such a long tube.

James M. Norton, Ph.D.
University of New England
11 Hill's Beach Road
Biddeford, ME  04005
phone: [207]283-0171 x2270
fax: [207]283-3249
email: jnorton@mailbox.une.edu