1000PA

| 1000 Prehistorc Animals | Dinosaurs, Fossils, Ruins | Articles and News |

  • Home
  • Anthropology
  • Archaeology
  • Evolution

    • Evolution / Charles Darwin

      Life on Earth evolved from a universal common ancestor approximately 3.8 billion years ago...

  • Paleontology

Wed06282017

Last update04:28:52 PM GMT

Back Paleontology Paleontology 'Dinosaur bends' caused by prolonged diving

'Dinosaur bends' caused by prolonged diving

  • PDF

1000pa (Aug. 15, 2012) — Dinosaurs-like creatures may have injured themselves during leisurely deep-sea diving trips and not from resurfacing too quickly, as previously thought.


Share This:
See Also:

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."

Share this story on Facebook, Twitter, and Google:

Other social bookmarking and sharing tools:


Story Source:

The above story is reprinted from materials provided by University of Melbourne.

Note: Materials may be edited for content and length. For further information, please contact the source cited above.


Journal Reference:

  1. John Hayman. Deep-diving dinosaurs. Naturwissenschaften: Science of Nature, 2012 DOI: 10.1007/s00114-012-0937-x

Note: If no author is given, the source is cited instead.

Disclaimer: Views expressed in this article do not necessarily reflect those of ScienceDaily or its staff.

First Bird

First Bird
What was the earliest known bird?

Unexplained artifacts

unexplained artifacts
The 10 most amazing unexplained artifacts

Evolution

Timeline: Human Evolution

Biggest Dinosaurs

The 10 Biggest Dinosaurs

Fossils 

Fossil Formation: How Do Fossils Form?
 

Book review

Dinosaurs Encyclopedia

Book Review

Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages ... WRITTEN BY A PROFESSIONAL paleontologist specifically for young readers, this guide to the Dinosauria is packed...