Re: Lack of Running Giant Theropod Tracks

["Richard W. Travsky" <rtravsky@uwyo.edu>]

On Fri, 26 Nov 2010, tholtz@geol.umd.edu wrote:
> > ...
> A complication here: the Acrocanthosaurus may not have been hopping so
> much as been carried along by the Paluxysaurus/whatever. So it might not
> be the theropod's leg muscles alone that lifted it off the ground.
>
> That said, there are a number of reasons to expect large theropod running
> tracks to be rare:
> * Such big animals may not have run or run much
> * &/or they are unlikely to have run on wet, slippery surfaces that can
> record a trackway
> * &/or the stride length of a fast running large theropod will be so long
> that you need a very large surface to record them.

So, one print by itself would be evidence of running?  ;)

* predators are usually fewer in numbers than prey, so wouldn't this
be a factor too? out of curiousity, what is the ratio of predator/prey
prints?