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:2/28/2020)... ... February 28, 2020 , ... Regen ... orders. This includes all available stem cell and exosome biologics. , Regen Suppliers ... Exosome Biologics, PRP kits, adipose kits, PDO thread lifts and more. The ...
(Date:2/14/2020)... ... February 14, 2020 , ... Trial By Fire ... eTMF and Payment tracking, will be showcasing SimpleTrials at the Summit For Clinical ... the SCOPE Summit last year, the SimpleTrials team has completed full validation of ...
(Date:2/13/2020)... ... February 13, 2020 , ... Worldwide ... Nobio CEO Yoram Ashery to discuss how their revolutionary technology can ... combats bacteria to keep people healthy with their revolutionary nanoparticle technology. Nobio is ...
Breaking Biology News(10 mins):
(Date:2/5/2020)... ... 2020 , ... Shoreline Biome , a microbiome research ... has announced a new distribution partnership in Asia. , The distribution partner, Gene ... and research organizations in China, Hong Kong, and Macau. , Gene Company Limited ...
(Date:2/3/2020)... Hungary and CAMBRIDGE, Mass. (PRWEB) , ... February ... ... in Budapest with US offices in Cambridge, MA, announce that OmniType, the 11-locus, ... Program (EAP) from today. OmniType is a best-in-class product featuring locus-multiplexing and short ...
(Date:1/28/2020)... (PRWEB) , ... January 28, 2020 , ... ... Better Salivary Assay Kits . The new Salivary Total Human IgG ... “By measuring total immunoglobulin G in saliva, researchers can extend the accuracy and ...
(Date:1/24/2020)... ... 2020 , ... The plastic and reconstructive surgeons at The Institute for ... notion that plastic surgery is much more than just cosmetic surgery and far more ... last 20 years NJ Top Docs, Dr. Andrew Elkwood, Dr. Michael Rose, Dr. Matthew ...
Breaking Biology Technology:
Cached News: