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Re: Cold-blooded vs. warm-blooded (LONG REPLY)



John (and others):

    (ALERT - THIS IS SPECULATION):      :-)

    As a guess, I think that MANY creatures would have major problems with
that high an increase of temperature for an extended period of time.  Many
large creatures would have difficulty dumping the excessive heat.

    Perhaps many small creatures would have a greater advantage by beaing
able to find more cooling shelters.

    Reptiles and amphibians have certain ranges for the sucessful hatching
of their eggs, and for the sexual determination of the offspring as well -
Many people have speculated that dinosaurs would have similar temperature
dependences for their eggs.

    Hope this info is enough,

        Allan Edels

-----Original Message-----
From: John Bois <jbois@umd5.umd.edu>
To: Allan Edels <Edels@email.msn.com>
Cc: dinosaur@usc.edu <dinosaur@usc.edu>
Date: Monday, April 12, 1999 10:17 PM
Subject: Re: Cold-blooded vs. warm-blooded (LONG REPLY)


>
>Could you hazard a guess at how the dinosaurs would have
>responded--relative to other creatures--to abnormally high temperatures.
>Would they have been at a relative disadvantage if, say, the temperature
>increased 10C over previous highs for an extended period of time?  And
>thank you for informative post.
>John Bois.
>
>On Sun, 11 Apr 1999, Allan Edels wrote:
>
>> 1.Some dinosaurs had spikes, plates, frills, and/or large nasal cavities
>> that may have acted as heat exchangers, helping to warm or cool their
>> bodies. (These could have merely been used for sexual display purposes,
or
>> for defensive purposes. Of course, they could have served multiple
purposes
>> at once). The long necks and tails of the sauropods may have acted in
these
>> ways as well.
>