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Re: Sexual dimorphism in T. rex

>But why larger females?  Males in many species are larger because they
>rival over the females.  But if the larger rexes ARE females, this may
>tell us something about the mating habits of T. rex.
>Raptor RKC (Rachel Clark)

Not necessarily.  In many hawks, for example, the female is larger than the
male - sometimes considerably larger.  This is sometimes explained as a way
for males and females to exploit slightly different niches, with the female
larger as she has the larger biomass requirements to contribute to breeding
(egg formation, etc).  I don't think this has anything to do with mating
habits.  As for T. rex, of course, who knows?
Ronald I. Orenstein                           Phone: (905) 820-7886 (home)
International Wildlife Coalition              Fax/Modem: (905) 569-0116 (home)
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