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Re: re:Dinosaur Hunting techniques
firstname.lastname@example.org (Betty Cunningham) wrote:
<< You don't mention that lions tend to have multiple animals bringing
down larger prey, not just attacking one-on-one. This seems to be
determined mostly on how hungry the pride is when the prey is brought
down. So a baby gazelle may be brought down one-on-one, but an adult
gazelle/wildebeast/zebra may be brought down by several individuals.
How does this affect your theory? >>
Granted lions tend to hunt in groups. However, that does not preclude the
occasional lone hunter from trying his/her luck. My statements regarding the
hunting strategies of lions refer to such occasions.
<< Didn't you know that they race cheetahs like
greyhounds in Egypt and other Arabian countries>>
No, I didn't. However, racing cheetahs does not necessarily involve studying
their acceleration abilities. Milton Hildebrand has done some wonderful
studies involving cheetah _speeds_, for example, but nothing much on
_accelerations_. Lions, on the other hand, have been studied for their
acceleration abilities, using force-generated-by-hind-limbs and mass
<< Why, in your discussions of the physiology of the animals, lions,
cheetahs, and T rexs, do you consider lions, being a very robust
animal, like cheetahs, and not like T rex, also a very robust animal.>>
Well, because lions are more like cheetahs then they are like tyrannosaurs.
However, I believe (although this may not have come across in my posting)
that tyrannosaurs were more like lions than cheetahs in their pursuit
<< T rexs certainly aren't gracile in any way. Cheetahs are very
gracile. They have flexible spines so that in the full gallop their
spines ripple like a trampoline. I don't picture T rex's spine doing
anything so undignified during a run. I can see (perhaps) something
smaller and more elegant of form like Veloceraptor or Deinonychus
developing along the lines of a speedster like the cheetah, but not
ol' brick T rex. He's built like a truck, not a Ferrari. Perhaps
even Allosaurus fragilus might be considered to be a speedier design,
but T rex? >>
There's a very good reason why you don't picture tyrannosaur spines rippling:
tyrannosaurs are bipeds! The elastic spine of quadrupedal cursors helps to
store energy, allowing for a much increased stride when the spine is
straightened (which occurs when the animal pushes off with its hind feet).
Theropod dinosaurs, being obligate bipeds, have no need for (and indeed,
could not use) such an energy-storing mechanism. This is not to say that
they might not have had other mechanisms - perhaps thick elastic foot pads.
However, I seriously doubt that any bipedal runner could match a
similar-sized quadruped for speed. I have never been able to outrun any dog!
<< (and what with all the fused tendons along most therapods' tails, you
don't see the completely supple spine like in a cheetah, anyways.
Therapods spines seem to have been reinforced to prevent exactly that
kind of movement.)>>
Again, the two animals operate differently. I apologize if I gave the
impression that tyrannosaurs were likely the fastest runners of their day. I
merely wished to convey the idea that they may have been quite capable of
running down prey at "high" speeds. How high depends on how fast their prey
Hope this clarifies some points.