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Re: Great in the air, not so good underwater

----- Original Message ----- From: "don ohmes" <d_ohmes@yahoo.com>
To: <dinosaur@usc.edu>
Sent: Friday, December 08, 2006 2:51 PM
Subject: Re: Great in the air, not so good underwater

One of the objections I have heard to the 'ground-up' scenario of flight origin; it seems to require that flapping capability/behavior precede the ability to generate lift. I say "seems" because it is possible to construct other scenarios.

Indeed so....

Even so, if the hatchetfish is flapping but truly getting _no_ benefit, that may be more interesting from a flight origin perspective than the popular image of a flying fish w/ limited flight ability.

I think so too.

The key here may be what is really "significant" relative to lift generation.

In the case of the hatchetfish, it would be appropriately phased pronation and suppination of the flapping stroke. I doubt that it would take many mutations to accomplish that. Average plunge axis would become important later.