Re: Tyrannosaur hunter-gatherers?

["David Marjanovic" <david.marjanovic@gmx.at>]

----- Original Message -----
From: "aspidel" <aspidel@infonie.be>

> >   Perhaps one sex was a faster predator
>
> Yep, the lighter (the male, like in our extant raptors - I mean
eagles,...-
> that's what is said in WWD), which I imagine was able to run faster,

Wait a minute. The females, if true, were bigger, which means they 1. were
heavier (making them slower), 2. had longer legs (making them faster) and 3.
had more muscle mass (making them faster). Shouldn't they have been faster
on the whole?

> > and the other sex was more of a scavenger.
>
> or maybe sometimes predator, sometimes scarvenger.

which means predator.

----- Original Message -----
From: "Dino Guy and Computer Gal" <gbabcock@best.com>

> It is the younger tyrannosaurs that were light and long legged enough to
truly
> run, with hind limbs nearly identical to those of ornithomimids.

All tyrannosaurs and ornithomimids plot along the same growth curve AFAIK.
So, relatively seen, they are all light and long legged, and more so than
*Giganotosaurus*.

> Philip Currie
> [...] postulates that the albertosaur juveniles
> might have run prey individuals into the waiting jaws of the slower but
more
> powerful large adults.  [...] The hypothesis is unproved, of course, but
in
> my opinion is quite plausible, although it does require a good degree of
> coordinated behavior on the part of the tyrannosaurs.

I've seen on TV lions in Namibia doing this, but with females instead of
youngsters and a big male instead of all adults. Very impressive.