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Re: Gastric stones of dinosaurs were not for milling food !
Heh. _Average_ 4 bites per minute. For 10 hours. No chewing time figured
in. Chewing takes a _long_ time.
[BTW-- cows don't really chew
They do -- just later.
Open mouth-- 1 sec. Inhale leaf cluster-- 1 sec. Close mouth-- 1 sec. Pull
head back to "strip'-- 1 sec. Swallow-- 1 sec. That is 12 bites per minute
As I said: much more than 4 bites per minute.
and doesn't not include time spent moving to a new stand, locating the
next mouthful, or pre-positioning of head. I think to meet these numbers,
even temporarily, is extraordinarily difficult in realistic scenarios re
abundance and quality of vegetation.
At average sauropod size you're way beyond the point where, according to
Marx, quantity changes into quality and... ;-) Seriously: the bigger an
animal and the longer its gut, the worse the quality of food it can afford
to live off. If cows can afford to live off grass, surely sauropods can
afford living off conifer needles? Let alone fern or cycad fronds.
Do you really think they can average 8 bites per minute over the course of
Of course. I repeat: with these mouthparts they didn't chew.