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:7/29/2014)... UK overseas territory of Ascension Island, one of the ... a renaissance. , Writing in the journal Biodiversity ... and Ascension Island Government Conservation Department report that the ... Atlantic outpost has increased by more than 500 per ... as 24,000 nests are now estimated to be laid ...
(Date:7/29/2014)... Schools of Dentistry (UM SOD) and Medicine (UM ... a five-year $10.7 million grant award from the ... of the National Institutes of Health to study ... (STDs). The grant, which renews a previous $12 ... direction for the research by studying chlamydial and ...
(Date:7/29/2014)... for parents of preterm babies latest research from the ... they become teenagers, the brains of many preterm children can ... A study conducted by the University,s Robinson Research Institute ... experiences no brain injury in early life, their cognitive abilities ... term-born peers. , However, the results of the study, published ...
Breaking Biology News(10 mins):Major turtle nesting beaches protected in 1 of the UK's far flung overseas territories 2University of Maryland Schools of Dentistry and Medicine receive NIH grant 2University of Maryland Schools of Dentistry and Medicine receive NIH grant 3University of Maryland Schools of Dentistry and Medicine receive NIH grant 4Preterm children's brains can catch up years later 2
(Date:7/29/2014)... 2014 “PharmaSphere: Emerging Biotech Investment ... Capital Funding” report provides in-depth analysis of the ... and venture capital segments of the financial industry, ... have significant impact on the future of emerging ... the report identifies regions of the world that ...
(Date:7/29/2014)... 2014 Human Longevity, Inc. (HLI), a genomics ... extending the healthy, high performance human life span, today ... an expert in machine learning and machine translation as ... from Google where he was Distinguished Research Scientist and ... to HLI Co-Founder and CEO, J. Craig Venter ...
(Date:7/29/2014)... July 29, 2014  The Society for Clinical ... updated program for the 9 th annual ... in Amelia Island , Florida.  The focus ... remains unchanged, however, the topics and format will ... opportunity among all stakeholders with a continued focus ...
(Date:7/29/2014)... , July 29, 2014  Discovery Laboratories, Inc. ... advancing a new standard of respiratory critical care, will ... August 5, 2014 before the open of the ... will host a live teleconference and webcast at ... conference call, Discovery Labs, management will discuss the ...
Breaking Biology Technology:Strategic Trends of Biotech Investment Industry (Private Equity and Venture Capital Funding) in New Report Available at MarketOptimizer.org 2Strategic Trends of Biotech Investment Industry (Private Equity and Venture Capital Funding) in New Report Available at MarketOptimizer.org 3Strategic Trends of Biotech Investment Industry (Private Equity and Venture Capital Funding) in New Report Available at MarketOptimizer.org 4Franz Och, Ph.D., Expert in Machine Learning and Machine Translation, Joins Human Longevity, Inc. as Chief Data Scientist 2Franz Och, Ph.D., Expert in Machine Learning and Machine Translation, Joins Human Longevity, Inc. as Chief Data Scientist 3TransCelerate, Lilly, Pfizer, and FDA Highlight Collaborative Program at the Site Solutions Summit 2TransCelerate, Lilly, Pfizer, and FDA Highlight Collaborative Program at the Site Solutions Summit 3Discovery Labs to Report 2014 Second Quarter Financial Results and Hold Conference Call on Tuesday, August 5, 2014 at 9:00 a.m. Eastern Time 2
Cached News: