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:6/2/2016)... June 2, 2016   The Weather Company , an ... Ads, an industry-first capability in which consumers will be able ... to ask questions via voice or text and receive relevant ... Marketers have long sought an advertising solution ... can be personal, relevant and valuable; and can scale across ...
(Date:6/1/2016)... Favorable Government Initiatives Coupled With ... Identification to Boost Global Biometrics System Market Through 2021  ... report, " Global Biometrics Market By Type, By ... 2011 - 2021", the global biometrics market is projected ... of growing security concerns across various end use sectors ...
(Date:5/20/2016)... May 20, 2016  VoiceIt is excited to ... VoicePass. By working together, VoiceIt and ... VoiceIt and VoicePass take slightly different approaches to ... both security and usability. ... this new partnership. "This marketing and ...
Breaking Biology News(10 mins):
(Date:11/30/2016)... GREENWICH, Connecticut , November 30, 2016 ...   ... Aptuit, LLC today announced ... screening library. An additional 150,000 novel compounds have increased the ... selected to broaden the hit discovery capabilities of the company. ...
(Date:11/30/2016)... ... November 30, 2016 , ... ... technology applications, introduces the 5th generation, ultra-bright, Laser-Driven Light Source, the EQ-77, at ... Source (LDLS™) technology, the EQ-77 offers higher radiance and irradiance from a truly ...
(Date:11/30/2016)... ... , ... With growth rates averaging more than 30% each year, Random42 has ... continuing their expansion in their new office space. The new office has a fantastic ... the creative industries, so Random42 Scientific Communication will fit right in. , Ben ...
(Date:11/30/2016)... November 30, 2016 Teil einer ... ... , Aptuit LLC ... zu haben. Zusätzliche 150.000 neuartige Substanzen haben die Prüfsammlung ... ausgewählt, um die starken Entdeckungsfähigkeiten des Unternehmens zu erweitern. ...
Breaking Biology Technology: