HOME >> BIOLOGY >> NEWS
Paleontologists establish first age distribution of non-avian dinosaur population

For the first time, scientists have established the age structure of a non-avian dinosaur population. Using this information, they inferred which factors led to survival or death of group members.

Did these animals show survival patterns akin to extant living dinosaurs, the birds, as did like their crocodilian cousins? Or, did they mirror that of more distantly related dinosaurs that lived in a similar environment? A pile of bones from the North American tyrannosaur Albertosaurus sarcophagus may hold the answer.

These animals "showed exceptional survivorship once they passed the hatchling stage," said Gregory Erickson of Florida State University, co-author of a paper reporting the results in this week's issue of the journal Science.

"Factors such as predation and [timing of] entrance into the breeding population may have influenced survivorship," the researchers say. Such patterns are common today in wild populations of long-lived birds and mammals.

Why increased survivorship as juveniles? "In living populations it occurs because animals reach threshold sizes, and predation pressures decrease," said Erickson. "By age two, most tyrannosaurs were as large or larger than nearly all other predators in their realm."

"Because most species of non-avian dinosaurs are known from just one or a few specimens, very little is understood about the population biology of these animals," said Richard Lane, program director in the National Science Foundation (NSF)'s Division of Earth Sciences, which funded the research."We now have a breakthrough in unraveling these dinosaurs' life cycles."

The burial site was first found and partially excavated in 1910 by famed dinosaur hunter Barnum Brown of the American Museum of Natural History, who discovered it along the Red Deer River in Alberta, Canada. The site was recently reopened by scientists from the Royal Tyrrell Museum of Palaeontology in Alberta, Canada, on an expedition led by co-auth
'"/>

Contact: Cheryl Dybas
cdybas@nsf.gov
703-292-7734
National Science Foundation
13-Jul-2006


Page: 1 2

Related biology news :

1. Paleontologists discover new mammal from Mesozoic Era
2. Paleontologists discover most primitive primate skeleton
3. Paleontologists to discuss gap fossils that link fish and land animals
4. Psychiatric Genomics Center established at Cold Spring Harbor Laboratory
5. New findings challenge established views on human genome
6. New findings challenge established views about human genome
7. ConocoPhillips establishes $22.5M biofuels research program at Iowa State
8. AACR establishes new lecture in honor of Princess Takamatsu
9. NIH establishes Center of Excellence for influenza research at Mount Sinai
10. UCSD scientists establish connection between life today and ancient changes in ocean chemistry
11. Joslin Diabetes Center in Boston establishes first affiliate in Canada

Post Your Comments:
(Date:10/30/2014)... 2014 Biological membranes are mainly composed of lipid ... solution ions onto lipid membranes helps clarify functional ... provides a quantitative description of the equilibria between ... and Zbigniew Figaszewski from the University of Bialystok, ... these findings, just published in EPJ E ...
(Date:10/29/2014)... In the largest study of its kind to date, ... genes that heighten the risk for autism. Joseph Buxbaum, ... York City, Mark Daly, Ph.D., Broad Institute of Harvard ... DNA samples from affected children, parents and unrelated people. ... to contribute to the risk for autism spectrum disorder ...
(Date:10/29/2014)... but they also need protection from its harmful rays, just ... in plants that shields them from sun damage. Now, in ... Society , one team reports on the mechanics of how ... at Purdue University note that the harsh ultraviolet radiation plants ... DNA and, as a result, hinder plant growth. Biochemical ...
Breaking Biology News(10 mins):Ion adsorption matter in biology 2
(Date:10/30/2014)... LONDON , October 30, 2014 ... Organovo Holdings Inc. (NYSE MKT: ONVO), Medivation Inc. (NASDAQ: ... PCYC ), Synthetic Biologics Inc. (NYSE MKT: SYN), and ... five companies can be accessed at: http://investor-edge.com/register ... Composite ended at 4,549.23, down 0.33%, the Dow Jones ...
(Date:10/30/2014)... BOSTON, MA (PRWEB) October 30, 2014 ... communication and collaboration provider, offers Office 365 end ... software into a complete phone system by adding ... Office 365 (O365) includes Lync Online, a communication ... to Lync calls. With hosted voice, O365 becomes ...
(Date:10/30/2014)... Kentucky (PRWEB) October 30, 2014 Avure Technologies ... the 525L, the newest member of its fleet of high ... be reaching an anniversary as we return to PackExpo this ... year ago in Las Vegas,” said Jeff Williams, CEO at ... well, and we’re pleased to be meeting the challenges of ...
(Date:10/30/2014)... challenges in the development of quantum technologies has been ... paper published today (28 October) in Nature Communications ... make a new type of flexibly designed microscopic trap ... sensors and specialised superfast computers, often depend on harnessing ... trapping these tiny particles are hugely problematic because of ...
Breaking Biology Technology:Biotech Equities Movers and Shakers - Organovo Holdings, Medivation, Pharmacyclics, Synthetic Biologics, and Ironwood Pharma 2Biotech Equities Movers and Shakers - Organovo Holdings, Medivation, Pharmacyclics, Synthetic Biologics, and Ironwood Pharma 3Biotech Equities Movers and Shakers - Organovo Holdings, Medivation, Pharmacyclics, Synthetic Biologics, and Ironwood Pharma 4Biotech Equities Movers and Shakers - Organovo Holdings, Medivation, Pharmacyclics, Synthetic Biologics, and Ironwood Pharma 5SoundConnect Launches Voice Enablement and Hybrid Audio Conferencing for Office 365 2SoundConnect Launches Voice Enablement and Hybrid Audio Conferencing for Office 365 3In High Demand: New High Pressure Processing (HPP) System with Maximum Throughput Drives Strong Sales 2In High Demand: New High Pressure Processing (HPP) System with Maximum Throughput Drives Strong Sales 3
Cached News: