HOME >> BIOLOGY >> NEWS
Purdue Study Finds Prehistoric Couch Potato

CHICAGO -- Tyrannosaurus rex may have had a sedentary cousin that might better have been called Ty-sit-osaurus.

That's the finding of Purdue University researcher Richard Hengst, who studies the physiology of dinosaurs to determine the efficiency of their breathing systems.

Hengst, a biologist at Purdue's North Central campus, found that while all early dinosaurs -- those dating back about 220 million years -- breathed inefficiently, dinosaurs that lived only 70 million to 65 million years ago had a much-improved system, resembling that of modern mammals.

However, the rate of improvement in respiratory capabilities differed significantly between the South American and North American dinosaurs, with the southern dinosaurs lagging behind their northern relatives in aerobic fitness for tens of millions of years.

"Whereas 140 million year ago, the Argentine dinosaurs breathed only slightly more efficiently than their more primitive ancestors, the North American dinosaurs of the same age had vastly improved their technique," he says. "The South Americans caught up with their northern relatives only in the later Cretaceous, or about 70 million years ago."

He will present his findings Saturday (10/11) during the annual meeting of the Society of Vertebrate Paleontologists in Chicago.

In his study, Hengst looked at how the ribs were attached to the vertebral column to determine the efficiency of the respiratory systems in a number of carnivorous theropods, a class of flesh-eating dinosaurs that walked mainly on their hind legs and included Tyrannosaurus rex.

By analyzing how the ribs pivoted around two prominent points, and studying how the ribs that make up the chest were aligned on the vertebrae, Hengst was able to determine how the dinosaurs' ribs moved during breathing.

"The more efficiently the chest expanded, the more air the animal could take in and therefore the more aerobic it could be," he says.

Though all of the o
'"/>

Contact: Susan Gaidos
susan_gaidos@uns.purdue.edu
765-494-2081
Purdue University
9-Oct-1997


Page: 1 2 3

Related biology news :

1. Purdue study finds antioxidant protects metal-eating plants
2. Bright idea could doom cancer and viruses, say Purdue scientists
3. Purdue yeast makes ethanol from agricultural waste more effectively
4. IU and Purdue scientists to answer questions about Brood X periodical cicadas
5. Purdue scientists finding ways to outsmart crop-damaging bugs
6. Chestnut trees to spread across landscape again, says Purdue scientist
7. Purdue scientists: To stop cancer, keep your Icmt away from your Ras
8. Purdue chemists put the twist on protein building block
9. Purdue scientists: Genetically modified fish could damage ecology
10. Fat cells fight disease, Purdue University researchers find
11. Purdue chemist mussels in on secrets of natural adhesives

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:9/22/2018)... , ... September 21, 2018 , ... ... outcome. However, the implant manufacturer’s warranty does not always protect them against uninsured ... breast augmentation with the IDEAL IMPLANT Premium Protection Plan for greater ...
(Date:9/15/2018)... ... 2018 , ... The first ever production picosecond-domain laser with a 785?nm wavelength ... tattoo inks - often the colors most resistant to laser removal. , A clinical ... American Society for Laser Medicine and Surgery, Inc. (ASLMS) investigated the safety and efficacy ...
(Date:9/12/2018)... ... September 10, 2018 , ... ... performance of its new Multiplexed Ion Beam Imaging (MIBITM) technology was accepted by ... study will also be shared during a webinar presented by Dr. Mike Angelo ...
Breaking Biology News(10 mins):
(Date:9/12/2018)... ... September 11, 2018 , ... Leading regenerative veterinary medicine ... Practitioners Conference (AAFP) later this month. The company’s CEO and founder, ... the treatment of chronic kidney disease in felines at a poster session on ...
(Date:9/12/2018)... Va. (PRWEB) , ... September 12, 2018 , ... ... Lauren Bronich-Hall, a quality management professional and former Senior Director of Regulatory Affairs ... Consultant. , As Senior Director of Regulatory Affairs and Quality Systems at ...
(Date:9/7/2018)... ... 06, 2018 , ... The Discovery on Target (DOT) conference ... industry’s preeminent event on novel drug targets.” BellBrook Labs’ high throughput screening (HTS) ... emerging targets in a quest to find new treatments for disease. , BellBrook ...
(Date:9/7/2018)... ... September 06, 2018 , ... Flagship ... has been validated to be as effective as manual pathology. The study, “Validation ... Frozen Muscle Biopsies,” was published in the Archives of Pathology & Laboratory Medicine ...
Breaking Biology Technology:
Cached News: