[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Re: flapping from gliding
In article <199610111837.NAA07218@juliet.ucs.indiana.edu>, Jeffrey
Martz <martz@holly.ColoState.EDU> wrote:
> Ruben made the suggestion that Archaeoptery was a "ground up"
>ectothermic flier. He asserts that reptilian muscle has (more? better)
>mitochondria, which allow greater bursts of energy than mammals are
>capable of. With these, Archaeopteryx may have been able to produce the
>thrust needed for a ground takeoff. I can't remember the metabolic
>details, its been about six months since I read his paper.
> I have heard objections to this idea, including the claim that the
>wrist in Archaeopteryx was not reinforced as it is in modern birds, so
>the extra burst needed for takeoff couldn't have been supported by the wrist.
How feasible is ectothermy for a sudden burst of energy in the
presence of body feathers ? Feather is one of the best insulators.
Would it not impede heat flow inwards just as it does for the flow
Gautam Majumdar firstname.lastname@example.org