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Re: Brrr, bone chilling paleopolar summers(Polar dinosaur growth and other new papers)

2011/8/7 Jaime Headden <qi_leong@hotmail.com>:
>   Your inference here, then, is that marine reptiles migrated, which would 
> imply they have a similar metabolic constraint and allowance as marine 
> mammals do which also migrate.

You mean, similar metabolic constraint and allowance in what sense?
Because Dermochelys is very active, yet have a basal metabolic rate
well below that of a similarly sized mammal, and it has been described
as migratory (http://www.seaturtle.org/PDF/James_2005_EcolLett.pdf).