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:4/4/2017)... , April 4, 2017   EyeLock LLC , ... that the United States Patent and Trademark Office (USPTO) ... covers the linking of an iris image with a ... and represents the company,s 45 th issued patent. ... is very timely given the multi-modal biometric capabilities that ...
(Date:3/29/2017)... -- higi, the health IT company that operates the largest ... , today announced a Series B investment from BlueCross ... new investment and acquisition accelerates higi,s strategy to create ... health activities through the collection and workflow integration of ... and secures data today on behalf of over 36 ...
(Date:3/23/2017)... The report "Gesture Recognition and Touchless Sensing Market by Technology (Touch-based and ... 2022", published by MarketsandMarkets, the market is expected to be worth USD 18.98 ... Continue Reading ... ...      ...
Breaking Biology News(10 mins):
(Date:8/16/2017)... OXFORD, England , Aug. 16, 2017  Kingfisher Talent, ... search and leadership development, and Virdis Group, global executive search ... exclusive alliance that enables clients to leverage the expertise and ... "For our clients here in the Boston ... diverse population of leadership talent throughout the US, ...
(Date:8/15/2017)... ... August 15, 2017 , ... Pittcon is pleased to ... and scientific instruments. This year’s symposium, organized by the Pittcon 2018 program chair, ... Bioanalytical Applications.” This dynamic presentation will discuss novel ionization processes, high throughput IMS-MS ...
(Date:8/15/2017)... Linda, Ca (PRWEB) , ... August 15, 2017 ... ... coffee production and is threatened by various biotic and abiotic factors. During this ... complex evolutionary history of coffee, as well as gain a better understanding of ...
(Date:8/14/2017)... ... 14, 2017 , ... The Conference Forum has confirmed the one-day ... on September 6, 2017 at the Marriott Copley Place in Boston, MA. , Returning ... and Regulatory Strategy, Pfizer Innovative Research Lab, Pfizer, who leads 19 industry speakers in ...
Breaking Biology Technology:
Cached News: