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Re: How Did Hadrosaurs Survive? (Was: Hadrosaur "mummy" questions)



Good points, Brett. I don't know if I agree totally with this statement
though:

 "To my knowledge in no modern pack hunters (Lions, Wolves, Hyenas, wild
dogs,Dingos, ect.) do the sub-adults start hunting until they have been
properly taught, through observation of hunting adults, and eventually
active participation. They need to learn stalking, chasing and capturing
techniques, plus they need to learn teamwork."

I DO agree that they need to learn teamwork from the adults, but my cat
learned how to stalk, chase, and capture prey very effectively without an
adult cat on hand to teach him how...but that's sort of beside the point, I
know.

As far as I can tell, the whole "youngins driving the herd into the waiting
jaws of mama and papa" hypothesis is at least partly driven by the notion
that an adult _Tyrannosaurus rex_ would be unable to chase down prey to
begin with, and I don't think that's the case.


----- Original Message -----
From: "Brett Booth" <brettbooth@worldnet.att.net>
To: <dinosaur@usc.edu>
Sent: Tuesday, October 29, 2002 11:47 AM
Subject: Re: How Did Hadrosaurs Survive? (Was: Hadrosaur "mummy" questions)


>
> Thanks for draggin me into this Jordan;)
>
>
> on 10/28/02 11:03 PM, theclaw10@charter.net at theclaw10@charter.net
wrote:
>
> > I might counter this by saying that maybe the younger tyrannosaurs are
just
> > doing what comes naturally (chasing after prey) and it was instead the
older
> > adults that learned to take advantage of an ambush strategy in
conjunction
> > with the chase. The youths would then be able to learn the ambush
aspects of
> > the hunting strategy by observation and the adults would not need to
teach
> > the youths how to chase after prey, since that part would come naturally
to
> > them anyway....
>
>
> Big hole in this, the juveniles need to know where the adults are going to
> be to drive the prey to them. They would need to be able to read the prey
> animals carefully in order to drive the prey into the waiting jaws of the
> adults. Think of a Border Collie driving a sheep towards a gate. This type
> of hunting is not instinctive, it is learned. If the adults don't do it,
> where are the young going to learn it, even through observation? The
adults
> would have to run all over the place themselves in order to be in the
right
> place for the young'uns to drive the prey to, which is a huge waste of
> energy. Then you have to consider, would a herd of hadrosaurs be afraid of
> the sub adult T. rex? Maybe they would chase it off? Stand their ground?
>
> To my knowledge in no modern pack hunters (Lions, Wolves, Hyenas, wild
dogs,
> Dingos, ect.) do the sub-adults start hunting until they have been
properly
> taught, through observation of hunting adults, and eventually active
> participation. They need to learn stalking, chasing and capturing
> techniques, plus they need to learn teamwork. Pack hunters of any kind
must
> work together and read each other carefully or you end up with a bunch of
> animals running around randomly.
>
> I see the more gracile T. rex (Male or Female) showing the young how to
get
> the prey to run in the right direction, how to herd the prey to where the
> larger more robust T. rex is lying in wait. This is all speculation of
> course but does evidence exist for this? Maybe. Don't some of the multiple
> T. rex burials have a big robust one and a smaller more gracile one (Sue
and
> I believe the L.A specimen/ or was it another one, Rigby's?)
>
> But if HP GSP is correct, the larger T. rex's were just as fast as the
> smaller ones so the sub adults wouldn't really be needed for a hunt at
all.
>
> Just my opinion,
>
> Brett
> www.demonpuppy.com
>
>
>
>