Navigation Links
'Dinosaur bends' caused by prolonged diving
Date:8/16/2012

Dinosaurs-like creatures may have injured themselves during leisurely deep-sea diving trips and not from resurfacing too quickly, as previously thought.

A recent study identified bone deformities on the fossilized remains of Ichthyosarians, which were giant dolphin-like reptiles that first appeared about 245 million years ago.

The lesions were similar to those human divers develop as a result of changes in body pressure, and suggest the reptiles suffered from a version of 'the bends'.

A new analysis by University of Melbourne pathologist Associate Professor John Hayman published in the latest edition of the Naturwissenschaften: Science of Nature journal sought to explain what may have caused the bone lesions.

That research argues the scarring may be the result of deep diving and spending too long at depth, causing excess nitrogen to be dissolved in the body, and not from quick ascents as previously thought.

"Ichthyosarians probably evolved the ability to dive deeper and to remain at depth for longer periods," Professor Hayman said.

"An alternative explanation is that the reptiles developed decompression sickness from being trapped in shallow water by predators.

"It wasn't from sudden and rapid ascents," he said.

Associate Professor Hayman said the dangerous practice of deep sea diving wouldn't have affected the replites' long-term survival because any ill effects would have developed later in life.

"The lesions wouldn't have been enough to kill the animal, and wouldn't have affected it's ability to hunt or breed."

Professor Hayman said the new analysis was possible because structure of modern humans' necks are very similar to the prehistoric reptiles.

"The arterial blood supply to the humerus and other bones such as the neck of the femur is highly conserved. It has remained much the same for 250 million years."


'/>"/>

Contact: Ryan Sheales
ryan.sheales@unimelb.edu.au
61-383-443-845
University of Melbourne
Source:Eurekalert

Related biology news :

1. Dinosaur fossil: Even specialized predators didnt turn down free meals
2. Exploding dinosaur hypothesis implodes
3. Duck-billed dinosaurs endured long, dark polar winters
4. Jurassic pain: Giant flea-like insects plagued dinosaurs 165 million years ago
5. Gaseous emissions from dinosaurs may have warmed prehistoric earth
6. Dinosaurs were warm-blooded reptiles
7. Newly discovered dinosaur implies greater prevalence of feathers
8. Feathered saurians -- downy dinosaur discovered
9. Fossil egg discovered in Lleida (Spain) links dinosaurs to modern birds
10. Engineering technology reveals eating habits of giant dinosaurs
11. Childhood virus infection linked to prolonged seizures with fever
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/19/2016)... , UAE, April 20, 2016 ... be implemented as a compact web-based "all-in-one" system solution ... the biometric fingerprint reader or the door interface with ... of modern access control systems. The minimal dimensions of ... ID readers into the building installations offer considerable freedom ...
(Date:4/14/2016)... , April 14, 2016 ... and Malware Detection, today announced the appointment of ... the new role. Goldwerger,s leadership appointment comes ... the heels of the deployment of its platform at ... behavioral biometric technology, which discerns unique cognitive and physiological ...
(Date:3/31/2016)... -- Genomics firm Nabsys has completed a financial  restructuring under ... M.D., who returned to the company in October 2015. ... including Chief Technology Officer, John Oliver , Ph.D., ... Vice President of Software and Informatics, Michael Kaiser ... Bready served as CEO of Nabsys from 2005-2014 and ...
Breaking Biology News(10 mins):
(Date:6/24/2016)... 24, 2016  Regular discussions on a range of subjects ... the two entities said Poloz. Speaking at a ... , he pointed to the country,s inflation target, which ... "In certain areas ... have common economic goals, why not sit down and address ...
(Date:6/23/2016)... , ... June 23, 2016 , ... ... release of its second eBook, “Clinical Trials Patient Recruitment and Retention Tips.” Partnering ... retention in this eBook by providing practical tips, tools, and strategies for clinical ...
(Date:6/23/2016)... Md. , June 23, 2016 A person ... from the crime scene to track the criminal down. ... the U.S. Food and Drug Administration (FDA) uses DNA evidence ... Sound far-fetched? It,s not. The FDA ... sequencing to support investigations of foodborne illnesses. Put as simply ...
(Date:6/23/2016)... NEW YORK , June, 23, 2016  The ... students to envision new ways to harness living systems ... of Modern Art (MoMA) in New York ... more than 130 participating students, showcased projects at MoMA,s ... included Paola Antonelli , MoMA,s senior curator of ...
Breaking Biology Technology: