Publikationsdatum:
2011-06-28
Beschreibung:
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 on the basis of differing methodologies. We used clumped isotope thermometry to determine body temperatures from the fossilized teeth of large Jurassic sauropods. Our data indicate body temperatures of 36 degrees to 38 degrees C, which are similar to those of most modern mammals. This temperature range is 4 degrees to 7 degrees 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 because of their gigantic size.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Eagle, Robert A -- Tutken, Thomas -- Martin, Taylor S -- Tripati, Aradhna K -- Fricke, Henry C -- Connely, Melissa -- Cifelli, Richard L -- Eiler, John M -- New York, N.Y. -- Science. 2011 Jul 22;333(6041):443-5. doi: 10.1126/science.1206196. Epub 2011 Jun 23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA. rob.eagle@gmail.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21700837" target="_blank"〉PubMed〈/a〉
Schlagwort(e):
Animals
;
Body Size
;
*Body Temperature
;
Body Temperature Regulation
;
Carbon Isotopes/*analysis
;
Carbonates/analysis
;
Dental Enamel/*chemistry
;
Dinosaurs/*physiology
;
*Fossils
;
Oxygen Isotopes/*analysis
;
Phosphates/analysis
;
Tanzania
;
United States
Print ISSN:
0036-8075
Digitale ISSN:
1095-9203
Thema:
Biologie
,
Chemie und Pharmazie
,
Informatik
,
Medizin
,
Allgemeine Naturwissenschaft
,
Physik
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