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Re: More about Erickson et al. 2004 and RE: Delayed "growth spurt" inT. rex

Another possible cause of the tyrannosaur growth curve could be the
presence of an alpha breeding pair. A dominant pair in a group (assuming
some tyrannosaurs lived in groups, of course, which I believe is
supported for some species) may supress the maturation of other group

Delayed maturation is seen in geladas (baboon-like primates), where the
mere presence of an alpha male prevents any other of the groups males
from reaching full adult size. If the alpha male dies and is not
replaced by an outside male, one of the remaining males in the group
will go through a remarkably rapid growth spurt, bulking up and
developing adult male face colouration.


Dann Pigdon
GIS / Archaeologist         http://www.geocities.com/dannsdinosaurs
Melbourne, Australia        http://heretichides.ravencommunity.net/