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:3/16/2017)... Germany , March 16, 2017 CeBIT 2017 - Against identity ... Continue Reading ... Used combined in one project, multi-biometric solutions provide ... Used ... Systems) ...
(Date:3/9/2017)... , Australia , March 9, ... study data at the prestigious World Lung Imaging Workshop ... Andreas Fouras , was invited to deliver the ... pulmonary medicine. This globally recognised event brings together leaders ... share the latest developments in lung imaging. ...
(Date:3/7/2017)... , March 7, 2017 Brandwatch , the ... by The Prince,s Trust to uncover insights to support ... The Trust. The UK,s leading youth charity will be ... campaign results and get a better understanding of the topics and ... ...
Breaking Biology News(10 mins):
(Date:4/25/2017)... ... April 25, 2017 , ... Covalent Metrology ... Analytical Services unit provides high-quality data to clients, both faster and ... of receipt. There are no price premiums, and customers are welcome to participate ...
(Date:4/24/2017)... ... April 24, 2017 , ... ... in a cellular milieu; however, the broad application of this cellular target engagement ... with sensitive quantitative readouts. Cell-based thermal stabilization assays are valuable methods for particular ...
(Date:4/21/2017)... ... 21, 2017 , ... The 2017 Colorado Manufacturing Awards celebrates ... nominees and well as the first-year award for 2017 Manufacturing Women of the ... hosted by CompanyWeek and Manufacturers Edge, among other sponsors. , The Colorado ...
(Date:4/21/2017)... ... April 21, 2017 , ... The ... announced first round funding to three startups through the UConn Innovation Fund. The ... new business startups affiliated with UConn. , The UConn Innovation Fund provides investments ...
Breaking Biology Technology:
Cached News: