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Sauropod teeth reveal cooler mammal-like body temperatures



From: Ben Creisler
bh480@scn.org

In Science Express advance publication:

Robert A. Eagle Thomas Tütken, Taylor S. Martin, Aradhna K. Tripati, Henry
C. Fricke, Melissa Connely, Richard L. Cifelli, John M. Eiler (2011) 
Dinosaur Body Temperatures Determined from Isotopic (13C-18O) Ordering in
Fossil Biominerals.
Science (advance online publication)
DOI: 10.1126/science.1206196 
http://www.sciencemag.org/content/early/2011/06/22/science.1206196
Abstract
The nature of the physiology and thermal regulation of the nonavian
dinosaurs is the subject of debate. Previously, arguments have been made
for both endothermic and ectothermic metabolisms based on differing
methodologies. Here, we used clumped isotope thermometry to determine body
temperatures from the fossilized teeth of large Jurassic sauropods. Our
data indicate body temperatures of 36 to 38°C, which are similar to most
modern mammals. This temperature range is 4 to 7°C lower than predicted by
a model that showed scaling of dinosaur body temperature with mass, which
could indicate that sauropods had mechanisms to prevent excessively high
body temperatures being reached due to their gigantic size. 


News story links:
http://www.livescience.com/14737-big-cool-dinosaur-blood-body-temperature.ht
ml

http://news.discovery.com/animals/dinosaurs-sauropods-body-temperature-11062
3.html



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