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Re: Scubasaurus!!!



Why I would like to know how a theropod would swim, the amount of effort to
push/pull a carcass hundreds of times you're weight in deep-water is not
really problematic if you can swim (for instance, I recently swam/pushed a
6,000 plus boat, with 7 people on board, with both engines down- a mile &1/2
into harbor, during a thunderstorm- and yes it sucked for me). But in this
case, odds are real good that the carcass will hit bottom in shallower water
before the predator can stand. But how is theropod to kill a sauropod in
deep water?
Also, what about attracting aquatic predators? For instance, felines that do
swim, do not often attack animals in the same waters that are inhabited by
crocodylians, I assume for fear of becoming the prey!

dlessin@accesschicago.net
David.Lessin@Walgreens.com
David.Lessin@EMC.Walgreens.com

-----Original Message-----
From: William Gibson Parker <wgp@dana.ucc.nau.edu>
To: Jordan Mallon <j_mallon@hotmail.com>
Cc: dinosaur@usc.edu <dinosaur@usc.edu>
Date: Sunday, August 09, 1998 8:26 AM
Subject: Re: Scubasaurus!!!


>
>I have a really hard time considering a Tyrannosaur, a good swimmer.  The
>arms would be useless, and the balance of the animal would seem to be off.
>It would seem to be almost suicide for a Tyrannosaur to enter deeep water.
>-Bill Parker Northern Arizona University
>
>On Sat, 8 Aug 1998, Jordan Mallon wrote:
>
>> Hi again tout le monde,
>>    First off, I'd like to say thanks to all who contributed to my
>> "theropod sunglasses" idea.  Secondly, I'd like to raise a new point.
>>    Reading "PDW," I had to disagree with Gregory Paul's idea that
>> herbivorous dinosaurs were far from being safe when chased into the
>> water by large theropods (p. 45).  If an Apatosaurus louisae (as
>> depicted in the book) swam into 40 feet of water, it would have been
>> more than safe from a pack of Allosaurus atrox.  I say this because what
>> would the attackers have done once they killed the apatosaur out so
>> deep?  If the victim didn't sink first, the allosaurs would have had
>> three choices
>> 1) eat and swim at the same time.
>> 2) go back ashore and wait for the carcass to wash up.
>> 3) somehow climb atop the dead body and eat the dead dino, then have to
>> swim back on a full belly.
>> I think all three choices are a little hard to imagine happening.
>>    Mr. Paul did raise the point, though, that there have been footprints
>> found which seem to indicate some theropods chasing iguanodonts out of
>> the water.  So maybe a predatory dinosaur would follow prey out deep in
>> hopes to chase it back to shore.
>>    Does anyone have any thoughts on this?  I sure hope this hasn't been
>> brought up before or I just waisted my time.  Thanks.
>>
>> -  Jordan Mallon
>>
>> PS-  I think the only point Mr. Paul was trying to make was that
>> theropods were good swimmers.  I just took the thought a step further.
>
>