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Re: Taking the temperature of dinosaurs?
If I correctly remember the previous work in the 1990s on this subject, it was
not the internal temperature of the animal, per se, that was important.
Rather, it was the difference between the temperature of an extremity (say, the
O18/O16 of a finger bone)compared to the "core" temperature (O18/O16 from a rib
bone or from a central thoracic vertebra).
Ecto's have a smaller "spread" in the isotopic ratios, whereas endo's and mass
homeotherms have a larger "spread" in the ratios.
That's all from memory, mind you. My library of dinosaur papers, collected
over 25 years, was all lost to an unethical (thief) potential landlord back in
2006 (that explains my absence here between 2006 and 2009), so I have been
"riding bareback" (by memory) since.
---------- Original Message ----------
From: Dann Pigdon <firstname.lastname@example.org>
Subject: Re: Taking the temperature of dinosaurs?
Date: Wed, 26 May 2010 11:37:57 +1000
On Wed, May 26th, 2010 at 11:19 AM, "Thomas R. Holtz, Jr." <email@example.com>
> It is worth noting that the analysis cannot at present resolve
> vs. ectotherms. It is just a thermometer: it is not a thermometer
> with a
> time component.
> Too many people in the press about this seem to think that
> animals actually have higher body temperatures than cold-blooded
Indeed. Some varanids are able to regulate their body temperatures to about 35
C, with a
precision of +/- 1 C.
That's higher than your average monotreme (30-32 C).
GIS Specialist Australian Dinosaurs
Melbourne, Australia http://home.alphalink.com.au/~dannj
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