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Re: Theropod bluff & hunting (was re Dilophosaurus Forelimb Bone Maladies
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- Subject: Re: Theropod bluff & hunting (was re Dilophosaurus Forelimb Bone Maladies
- From: Dann Pigdon <firstname.lastname@example.org>
- Date: Mon, 07 Mar 2016 08:41:00 +1100
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On Sat, Mar 5th, 2016 at 4:13 PM, Tim Williams <email@example.com> wrote:
> Mike Habib <firstname.lastname@example.org> wrote:
> > Most sharks are also small game hunters. Even large adult great whites
> mostly hunt juvenile pinnipeds that can be consumed in a bite or two.
> Further to this, the great white shark has to use its jaws to
> immobilize the pinniped fairly quickly (within < 1 min) to have any
> success at all. Otherwise, the young pinniped can struggle free and
> escape from the shark's jaws.
Even further to that; great white sharks have to wait until they reach full
adulthood before risking
biting down on something bony and larger than bite-sized with any degree of
force. It takes years for
a great white's cartilaginous jaws to mineralise enough to be able to stand the
stresses involved. That
would seem to make them poor analogues for large theropod dinosaurs.
Wroe, S., D. R. Huber, M. B. Lowry, C. R. McHenry, K. Moreno, P. D. Clausen,
and T. L. Ferrara. 2008.
3D computer analysis of white shark jaw mechanics: how hard can a great white
bite? Journal of
Zoology 276: 336?342
One thing that tips the hunting of large game in the favour of the predator is
Orcas for instance are capable of killing just about anything that lives in the
oceans by working
together, whereas they would struggle with any sort of large prey if they acted
alone. Likewise, lions
would be unlikely to tackle something as dangerous as a cape buffalo without
from pride members.
If any species of multi-tonne theropod could be shown definitively to have
hunted in well-coordinated
groups, then I wouldn't discount the occasional hunt of an adult sauropod
entirely. If the risk could be
moderated by co-operative hunting strategies, then the potential gain would
have been substantial.
If you were to sum the many minor risks involved in hunting lots of smaller
prey for a multi-tonne
biped that could injure itself simply by falling, you might also find that less
frequent higher-risk hunts
of much larger prey become more feasible from a risk management perspective.
Spatial Data Analyst Australian Dinosaurs