HOME >> BIOLOGY >> NEWS
Dinosaurs: New study counters age-old theory

Movies such as Jurassic Park and the acclaimed BBC television series Walking with Dinosaurs portray long-necked dinosaurs as raising their necks vertically to browse from the tops of trees.

And while most dinosaur palaeontologists also believe long-necked dinosaurs - collectively known as sauropods - behaved this way, a leading Adelaide University researcher has just published new data which suggests otherwise.

Dr Roger Seymour, from Adelaides Department of Environmental Biology, has co-authored a paper in the prestigious Proceedings of the Royal Society in London, which argues it was physically impossible for sauropods to behave in this way. The paper argues that due to the sauropods possible heart size and metabolic rates, the only way they could have functioned on land was with a horizontal neck.

Dr Seymour based his findings on his research of the factors which determine heart size in animals. He has spent the past 24 years collecting data on heart morphology and arterial blood pressure in reptiles, birds and mammals to determine how blood pressure influences the thickness of the heart wall. His research is directed at understanding the evolution of vertebrate cardiovascular systems.

His research shows that heart size in all animals depends on two factors: the vertical distance of the head above the heart, and whether the animal was cold- or warm-blooded. For example, the giraffe has exceptionally high blood pressure and an enlarged heart because it has to pump blood up its long neck. Birds and mammals also have relatively large hearts because they are warm-blooded, while cold-blooded reptiles have low metabolic rates, low blood pressures and smaller hearts.

"We have determined that the left ventricle in a warm-blooded Barosaurus, for instance, would have needed to weigh about 2000kg to pump the blood its brain needed," he
'"/>

Contact: Dr. Roger Seymour
roger.seymour@adelaide.edu.au
61-88-303-5596
Adelaide University
23-Oct-2000


Page: 1 2

Related biology news :

1. Student science contest participation influences study, career choices, alumni say
2. New study shows hope for treating inhalant abuse
3. International study findings link acne-like rash to effectiveness of new targeted cancer treatment
4. Cigarette smoke causes breaks in DNA and defects to a cells chromosomes, Pitt study finds
5. New study indicates arsenic could be suitable as first-line treatment in type of leukaemia
6. Phase II trials of second-generation antisense cancer drug planned following successful early study
7. Preclinical safety study shows adipose-derived stem cells improve heart function after heart attack
8. Indiana University, EPA to study airborne PCBs
9. K-State, other universities to study how climate affects plant evolution
10. USC study links historical increases in life span to lower childhood exposure to infection
11. Washington University in St. Louis leads group studying aging process

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:2/22/2017)... LONDON , Feb. 22, 2017 ... by 2021, ABI Research identifies four technologies that ... solutions to secure significant share in the changing ... payments, and passive authentication.   "Companies ... it comes to security," says Dimitrios Pavlakis ...
(Date:2/13/2017)... 2017  RSA Conference -- RSA, a Dell Technologies ... to enhance fraud detection and investigation across digital ... Fraud & Risk Intelligence Suite. The new platform ... insights from internal and external sources as well ... customers from targeted cybercrime attacks. "Fraudsters ...
(Date:2/8/2017)... (NASDAQ: AWRE ), a leading supplier of biometrics ... and year ended December 31, 2016. Revenue ... to $6.9 million in the same quarter last year. Operating ... compared to $2.6 million in the fourth quarter of 2015. ... million, or $0.02 per diluted share, which compares to $1.8 ...
Breaking Biology News(10 mins):
(Date:3/1/2017)... 2017  Elizabeth Young and Joshua Rosenthal , ... Washington University,s Health Workforce Speaker series. http://bit.ly/2lA6C8B ... will be speaking on March 9, 2017 at the ... Washington, DC at 12:00pm. The ... renowned speakers to examine new workforce configurations, their outcomes ...
(Date:2/28/2017)... ... February 28, 2017 , ... ... Inc. (Newark, DE) have formed a strategic partnership to develop and market ... renewable energy laboratories. These automated testing solutions will save analysis time and ...
(Date:2/28/2017)... and REYKJAVIK, Iceland , Feb. ... AppTec group company and the contract genomics organization enabling ... officer Hannes Smarason has been appointed as the company,s chief ... Long and Alex Fowkes have been named ... "WuXi NextCODE is executing on its vision to enable ...
(Date:2/28/2017)... (PRWEB) , ... February 28, 2017 , ... ... to their function as well as to their processing and transport properties. With ... on a wide variety of samples. The Litesizerâ„¢ 100 gives rapid and accurate ...
Breaking Biology Technology:
Cached News: