Navigation Links
New study first to directly measure body temperatures of extinct species
Date:5/24/2010

n species: the white rhinoceros, Indian elephant, Nile crocodile, American alligator and sand tiger shark. The study confirmed the rhinoceros and elephant, like all mammals, are warm-blooded, and their tooth enamel forms at about 37 degrees Celsius. Researchers confirmed the accuracy within 2 degrees Celsius by measuring teeth of modern sharks from temperature-controlled aquariums. In the next stage of the study, researchers tested fossils of mammoths and older extinct Florida alligator and rhinoceros species.

"The method we present is a big advance because it allows a direct measurement of the body temperature of extinct species, free from the assumptions required with other approaches," Eagle said.

Hulbert said previous research to measure body temperatures of extinct species by comparing concentrations of oxygen-16 and oxygen-18 involved making several assumptions about climate during mineral formation including average humidity of a region, the degree of seasonality and distance from nearest ocean.

The study authors concede there are limitations to the clumped isotope analysis method for studying the evolution of thermoregulation. The results are not a lifelong record and only provide a snapshot of temperature of that animal's body part at the time of formation. Hulbert also said if the tooth enamel has been significantly altered or chemically changed over geologic time, the method will not work.

Eagle said further testing of different-sized dinosaurs and other extinct vertebrates will provide more evidence about whether they were warm- or cold-blooded.

"Temperatures in the range of 26 to 30 degrees Celsius would suggest dinosaurs were similar to alligators and crocodiles," Eagle said. "Temperatures of 36 degrees or higher would be interesting but would not necessarily mean that they were warm-blooded like mammals. It's possible the higher body temperature could be a result of their large body mass, which allows grea
'/>"/>

Contact: Richard Hulbert
rhulbert@flmnh.ufl.edu
352-273-1930
University of Florida
Source:Eurekalert

0

GOOD

Page: 1 2 3

Related biology news :

1. Scientists to study impact of gulf oil spill on marine food webs
2. Obesity remains an economic issue, Seattle obesity study finds
3. NIH funds multicenter glue grant to study enzyme function
4. TEEB study leader emphasizes urgent need for action on biodiversity loss
5. Study uncovers optimal ecology of bioinsecticide
6. New lab manual for studying the biology of the nervous system in Drosophila is released
7. NIH grants K-State researcher nearly $1.5 million to study antibiotic-resistant bacteria
8. UT study finds viruses in untreated East Tennessee drinking water
9. New study reveals ways to better inhibit blood clots
10. Hammerhead shark study shows cascade of evolution affected size, head shape
11. Gene fusions may be the smoking gun in prostate cancer development, U-M study finds
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/23/2013)... Frontiers, one of the world,s largest and fastest ... new journal, Frontiers in Bioengineering and Biotechnology ... all specialties, Frontiers in Bioengineering and Biotechnology ... diverse and emerging bioengineering and biotechnology research to ... in Bioengineering and Biotechnology will provide an ...
(Date:5/22/2013)... 22, 2013 U.S. Forest Service scientists are part ... funding from the TKF Foundation, will examine how collaborative ... individuals recover from tragedy. , The TKF Foundation announced ... projects selected for grant funding. In addition to research ... in recovery and resiliency, the 3-year, $585,000 grant will ...
(Date:5/22/2013)... developed a novel technique that can detect molecular variants ... is one of the most important, though time-consuming, processes ... paper in Nature , post-doctoral researcher David Patterson, ... of the Center for Free-Electron Laser Science (CFEL) in ... microwave fields to identify molecular variants apart, and to ...
Breaking Biology News(10 mins):Frontiers launches new open-access journal in Bioengineering and Biotechnology 2'Landscapes of Resilience' to study how people use nature as a source of recovery 2Detecting mirror molecules 2Detecting mirror molecules 3
... and researchers at John Theurer Cancer Center at HackensackUMC, one ... latest findings in blood-cancer research at the 2012 American Society ... 1-5. Their involvement in these studies is part of John ... "We are proud to make a contribution ...
... According to a new study, children exposed to ... at increased risk for chromosomal aberrations (CAs), which have ... a potentially more harmful and long-lasting subtype of CAs. ... Health (CCCEH) at the Mailman School of Public Health, ...
... Therapeutics Centre (ETC) under the Agency for Science and Technology ... has enabled the successful development of the most comprehensive and ... this highly advanced kit, doctors can now rapidly detect all ... with almost 100% accuracy, within a few hours. This is ...
Cached Biology News:John Theurer Cancer Center presents significant blood cancer research at 2012 ASCO Annual Meeting 2Children exposed to the common pollutant naphthalene show signs of chromosomal damage 2Children exposed to the common pollutant naphthalene show signs of chromosomal damage 3Made-in-Singapore H5N1 diagnostic kit -- detects all known strains of H5N1 virus with a single test 2Made-in-Singapore H5N1 diagnostic kit -- detects all known strains of H5N1 virus with a single test 3
(Date:5/23/2013)... Patheon Inc ., a leading ... global pharmaceutical industry, will host a complimentary webinar on ... on Tuesday, June 4, 2013 at 11 a.m. Eastern ... to comply with regulations for cleaning validation. Many ... underpinning and little evaluation of risk. Some companies ...
(Date:5/23/2013)... 23, 2013 The maker community is ... of inventions. They focus on learning practical skills while ... gravitate toward bringing their ideas to life via crowdfunding. ... works on making projects using biology. Glowing Plant has ... to make them glow with bioluminescence genes, and has ...
(Date:5/23/2013)... , May 23, 2013  Saddleback Memorial Medical ... recently became the first hospital on the West Coast ... This new surgical option provides women with a state-of-the-art, ... Marc Winter , M.D., a highly ... surgeon and medical director of minimally invasive surgery at ...
(Date:5/23/2013)... May 23, 2013 On April 19th ... to supermarkets to search for the growing antibiotic resistant ... Results from a year long study were released late ... foods, specifically meats, over previous years. For those suffering ... growth of antibiotic resistant bacteria in food, may eventually ...
Breaking Biology Technology:Patheon to Present on “Cleaning Validation: Science, Risk and Novel Approaches to Testing” 2Glowing Plant Releases Maker Kit, Enabling Anyone to Make a Glowing Plant at Home 2Saddleback Memorial Surgeon First on the West Coast to Perform Single-Site Robotic Hysterectomy 2Saddleback Memorial Surgeon First on the West Coast to Perform Single-Site Robotic Hysterectomy 3Acne Cream, Probiotic Action Shares News on How Some Food may Breed Acne Causing Bacteria 2
... Arena Pharmaceuticals,Inc. (Nasdaq: ARNA ) today announced ... of,the inaugural companies in the new NASDAQ(R) NeuroInsights(R) ... an index designed to track,the performance of selected ... three major U.S. stock exchanges. The NASDAQ NeuroInsights,Neurotech ...
... MacroGenics, Inc. announced,today that Mr. Jeffrey H. Buchalter ... of Directors. With more than 20 years of ... and,biotechnology industry, Mr. Buchalter is well poised to ... company matures toward,commercializing its pipeline. "We are ...
... York, September 26 XTL,Biopharmaceuticals Ltd. (NASDAQ: ... on September 24, 2007, the Company received a ... comply with the minimum,$10 million shareholders, equity requirement ... set forth in Marketplace Rule 4450(a)(3), and that,its ...
Cached Biology Technology:Arena Pharmaceuticals Selected to Join New NASDAQ NeuroInsights Neurotech Index 2Arena Pharmaceuticals Selected to Join New NASDAQ NeuroInsights Neurotech Index 3Jeffrey H. Buchalter Joins MacroGenics Board of Directors as Chairman 2Jeffrey H. Buchalter Joins MacroGenics Board of Directors as Chairman 3XTL to Appeal NASDAQ Staff Determination; XTL May Transfer its ADR Listing to the NASDAQ Capital Market 2XTL to Appeal NASDAQ Staff Determination; XTL May Transfer its ADR Listing to the NASDAQ Capital Market 3
... --- a cocktail of 3 siRNAs specifically ... our most popular product. The siTrio reagent ... of your target gene when used under ... and confirmation of optimal transfection with one ...
... siTrio siRNA --- a cocktail of ... gene of interestis our most popular product. ... than 75% knockdown of your target gene ... siRNA for transfection and confirmation of optimal ...
... siTrio siRNA --- a cocktail of 3 ... of interestis our most popular product. The ... 75% knockdown of your target gene when ... for transfection and confirmation of optimal transfection ...
... siTrio siRNA --- a cocktail of ... gene of interestis our most popular product. ... than 75% knockdown of your target gene ... siRNA for transfection and confirmation of optimal ...
Biology Products: