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Re: Gastric stones of dinosaurs were not for milling food !
Did that before I asked. As far I can tell, bounds have not been set on leaf
mass/time in the manner I describe (that seemed unlikely to me; which is why I
asked for the ref). As sauros were obviously not limited by reach, or probably
locomotion, the limit on leaf-mass/time is (IMO) the jaws/teeth.
Assuming .25 kg per bite, average of 4 bites/minute, gives 600 kg/10 hours.
Given ideal type and density of foliage, seems doable. Given a requirement of
100 kg/day for elephant, 600 kg doesn't seem totally unreasonable as a daily
ration for a large sauropod (informed opinions, please?).
Real world, seems a little stretchy to me. Don't know any horses that can grab
a quarter kilo of clover in one bite, or even close. Also, as one who has
gathered various kinds of biomass w/ various tools, I can tell you that ideal
conditions are rare.
Perhaps someone has a ref that contains the data necessary to build a cheap jaw
model for a large sauropod? Lower jaw dimensions and a good picture of
teeth/tooth placement would do.
----- Original Message ----
From: David Marjanovic <firstname.lastname@example.org>
To: DML <email@example.com>
Sent: Sunday, December 31, 2006 9:10:09 AM
Subject: Re: Gastric stones of dinosaurs were not for milling food !
----- Original Message -----
From: "don ohmes" <firstname.lastname@example.org>
Sent: Sunday, December 31, 2006 2:57 AM
> Yeah it matters... Build a set of model jaws, see how much leaf mass you
> can strip off of various types of branches in a day.
That's not what I meant. I quote:
> >> ---------- By who?
> > Does that matter? Try GSP.
I think it's obvious what "that" refers to.
> I haven't seen where anyone has done that and concluded it was a slamdunk
> to gather several hundred kilos of leaves every day, but I am sure I
> missed something. You got a ref, I would really appreciate it.
I don't, as far as I know, but AFAIK it has been calculated. In any case, as
I wrote, it has been discussed onlist several times, so burrow through the