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

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:9/2/2014)... researchers at the University of Warwick in the UK ... in the Journal Early Human Development , has ... hospital after birth and the use of mechanical ventilation ... children. , Mathematic abilities are crucial for lifelong academic ... preterm children. Earlier studies of children who are born ...
(Date:9/2/2014)... is considered the most ideal source of nutrition ... critical role in the evolution and civilizations of ... contains a large number of bacterial species, including ... as no surprise to scientists and physicians. , ... to be the result of co-evolutionary and co-adaptive ...
(Date:9/2/2014)... 2, 2014) In the battle between our immune ... ally in bacteria-killing viruses known as phages. In a ... Partners In Health, Haiti,s National Public Health Laboratory, and ... give up their virulence in order to survive. Importantly, ... found that cholera,s mutational escape from phage predation occurs ...
Breaking Biology News(10 mins):Mechanical ventilation a key indicator for pre-term children's math problems 2Are human breast milk microbiome 'neutral'? 2Are human breast milk microbiome 'neutral'? 3War between bacteria and phages benefits humans 2War between bacteria and phages benefits humans 3
... Society has announced the winners of its second ... Society,s 57th Annual Meeting at the Pennsylvania Convention ... Society,s Committee for Professional Opportunities for Women (CPOW), ... number of women biophysicists and encourage their participation ...
... male jaguar and an adult male ocelot have been photographed ... monitoring cameras. The images were collected as part of the ... Arizona. Both animals appear to be in good health. ... from wildlife cameras set up as part of the research ...
... LA JOLLA, CA January 8, 2013 - Chemists at The ... one of the most fundamental tasks in molecular biology. Their new ... that these cells may be easily located and/or selected out from ... in a recent issue of the chemistry journal Angewandte Chemie ...
Cached Biology News:Biophysical Society announces winners of 2013 CPOW travel awards 2Wildlife monitoring cameras click jaguar and ocelot photos 2Wildlife monitoring cameras click jaguar and ocelot photos 3Chemists devise inexpensive, benchtop method for marking and selecting cells 2Chemists devise inexpensive, benchtop method for marking and selecting cells 3
(Date:8/31/2014)... Texas (PRWEB) August 31, 2014 ... the current state of the Epoxy Hardener ... a basic overview of the industry, including definitions, ... and Chinese domestic market analysis are provided with ... landscape of the market. A comparison between the ...
(Date:8/29/2014)... August 29, 2014 The global ... billion in 2019. It is expected to grow ... 2019, and was valued at $1.8 billion in ... Transparency Market Research. , For more information regarding ... . , The research report, titled “Companion Diagnostics ...
(Date:8/29/2014)... Hills, NY (PRWEB) August 29, 2014 ... Burnt Hills Veterinary Hospital are seeking candidates to participate ... dogs with osteoarthritis. The ultimate goal of this ... donor stem cells into one or two arthritically affected ... treated joints. , Candidates for the current investigational ...
(Date:8/29/2014)... San Antonio, TX (PRWEB) August 29, 2014 ... 9001:2008 and ISO 13485:2003 certified, GAMP® 5 compliant ... been awarded an international Phase II clinical trial ... non-Hodgkin’s lymphoma. , Throughout this trial, Intrinsic Imaging ... but not limited to, protocol and charter development, ...
Breaking Biology Technology:Epoxy Hardener Industry Development Trends in Global & China Regions Now Available at ReportsnReports.com 2Epoxy Hardener Industry Development Trends in Global & China Regions Now Available at ReportsnReports.com 3Companion Diagnostics Market to Hit $5.6 Billion in 2019: Transparency Market Research 2Companion Diagnostics Market to Hit $5.6 Billion in 2019: Transparency Market Research 3Burnt Hills Veterinary Hospital Seeks Candidates for an Investigational Study of Stem Cells for Dogs with Arthritis 2Intrinsic Imaging Awarded Phase II Clinical Trial to Assess New Treatment for Non-Hodgkin’s Lymphoma 2
... HALIFAX, May 23 /PRNewswire/ - ImmunoVaccine Technologies Inc. ... for being,recognized as one of Pennsylvania,s Best 50 ... of Immunotope Inc., received the honors,from Pennsylvania Governor ... in the biotech industry. Her clinical work in,antigen ...
... EXTON, Pa., May 23 BioTrends Research ... Nephrology," providing insight,into the referral patterns and ... from the perspective of Nephrologists,Cardiologists, Endocrinologists, and ... offers a comprehensive view, based on,qualitative interviews ...
... and PHILADELPHIA, Pennsylvania, May 23, Shire Limited ("Shire") (LSE: ... an,application has been made to the UK Listing Authority ... of 5 pence each in the,capital of Shire to ... on the,London Stock Exchange. Dealings will commence today at ...
Cached Biology Technology:ImmunoVaccine Technologies Congratulates Dr. Ramila Philip as One of PA's Best 50 Women in Business 2Nephrologists and Non-Nephrologists Alike Report Increased Attention on Chronic Kidney Disease 2Application for Listing of Shire Limited Ordinary Shares 2Application for Listing of Shire Limited Ordinary Shares 3