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Re: sauropods: homotherm,heterotherm or gigantotherm?

> Date: Thu, 15 Sep 2005 11:39:00 -0300
> From: Roberto Takata <rmtakata@gmail.com>
>>> Try swim... It costs more energy than walk or run in air.
>> Reference, please!
> If I'm not wrong:
> Williams, T.M. 1999. The evolution of cost-efficient swimming in
> marine mammals: Limits to energetic optimization. Phil. Trans. R. Soc.
> Lond. B 354, 193-201.
> (Well actually she says that specialists in different locomotion
> mode expend more or less the same amount of energy by a given
> traveled distance - at least between mammals - okay, we are not
> whale shark...)

That is a very strange paper.  Its figure 3a suggest (in agreement
with Greg's message) that the locomotion of terrestrial mammals is
indeed about five or six times as energetic as that of similarly sized
fish; but that marine mammals are about as efficient as terrestrial
mammals.  The bizarre but inescapable corrolary is that fish locomote
at a sixth the energy cost as same-sized marine mammals.  Can that
really be true?  Are dolphins that crap?

 _/|_    ___________________________________________________________________
/o ) \/  Mike Taylor  <mike@miketaylor.org.uk>  http://www.miketaylor.org.uk
)_v__/\  Women ...  They're less trouble than they're worth.