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Re: Unidirectional gator breathing in Science

--- On Thu, 1/14/10, Dann Pigdon <dannj@alphalink.com.au> wrote:

> That very pneumaticity would have made it very difficult
> for a sauropod to submerge far enough 
> for the nostrils to be under water, negating the need to
> have to hold their breath at all.

Bodysize alone would convey significant 'breath-holding' ability, even in the 
absence of "pneumaticity". This begs a question; key to the 'super-buoyant 
sauropod' concept is the assumption that there was no ability to voluntarily 
deflate the airsacs. 

Is this a safe assumption?