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Re: Segregated vs age-mixed sauropod herds

On Mon, Mar 15, 2010 at 9:54 AM, Mike Habib <habib@jhmi.edu> wrote:
> On Mar 14, 2010, at 10:52 PM, John Bois wrote:
>> In any case, the trend in amniotes seems to be
>> toward the evolution of more not less parental investment in
>> offspring--or, should I say, investment in fewer high quality babies.
>> This makes nest-guarding more of an imperative.
> Is there any test to demonstrate that this is the case? ÂCasual observation
> suggests that the only places where this trend might be robust is in a few
> clades of mammals. ÂEven then, it's just casual observation - rigorous
> testing might very find that these trends are not significant. ÂIn fact, I
> hypothesize that many lineages of amniotes, if tested rigorously, will show
> exactly the opposite trend.

Megapodes, for one.

T. Michael Keesey
Technical Consultant and Developer, Internet Technologies
Glendale, California