Navigation Links
Tyrannosaur survivorship -- tough times for teens

A massive dinosaur death bed in Alberta has helped map out the animal's life span and thrown doubt on long-held theories about how one species lived, says new research conducted in part at the University of Alberta.

"One of the surprises to me was that the overall pattern of survivorship fits closer to an attritional model rather than the catastrophic model we were expecting," said world-renowned paleontologist Dr. Phillip Currie and professor in the U of A's Department of Biological Sciences. "Hopefully this will help us to unravel the cause of death of so many carnivores at one location.

"It's also surprising that something like this study has never been done before."

For decades, scientists believed dinosaurs were bigger versions of living reptiles but this new research, published in the current issue of Science, shows that the life pattern of the Albertosaurus is closer to that of living large mammals. The pattern also shows that if the Albertosaurus lived until the age of two, he enjoyed a low death rate until the teenage years when mortality increased.

In 1910, a collecting party from the American Museum of Natural History floated down Alberta's Red Deer River. Led by Barnum Brown, they excavated skeletons of nine individuals of Albertosaurus sarcophagus from a single quarry. It is the best evidence that exists to suggest that tyrannosaurids may have been gregarious, or pack, animals. The almost complete lack of herbivore bones from the excavation suggests that this was probably not a predator trap. Recognizing the importance of the site, Currie led an expedition in 1997 to try to find Brown's original quarry and returned annually with a group from the Royal Tyrrell Museum of Palaeontology to excavate the site. The number of Albertosaurus individuals is now known to be at least 22, which range from two to almost 10 metres in total length.

For this latest paper, Currie collaborated with Dr. Gregory Erickson from Flor
'"/>

Source:University of Alberta


Page: 1 2

Related biology news :

1. FSU biologist says new dinosaur is oldest cousin of Tyrannosaurus rex
2. Protein fragments sequenced in 68 million-year-old Tyrannosaurus rex
3. Siberian tigers hang tough
4. Thin tough skin, slow-growing gills protect larval Antarctic fish
5. When the going gets tough, slime molds start synthesizing
6. To sea or not to sea: When it comes to salmon sex, size sometimes doesnt matter
7. Bugs expose underground carbon traffic system 10 times more important than fossil fuel burning
8. Data published in PNAS show antibodies can be made 10 times more toxic to cancer cells
9. Immune system police learn early and sometimes badly
10. Good times ahead for dinosaur hunters, according to U of Penn scientists dinosaur census
11. New approach could lower antibiotic requirements by 50 times
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Tyrannosaur survivorship tough times for teens

(Date:7/29/2014)... There,s some good news for parents of preterm babies ... that by the time they become teenagers, the brains of ... born at term. , A study conducted by the University,s ... as the preterm child experiences no brain injury in early ... as good as their term-born peers. , However, the results ...
(Date:7/29/2014)... Many different types of cell, including sperm, bacteria ... as flagella. These protrusions, about one-hundredth of a ... move through fluid. Similar, shorter structures called cilia ... where they perform roles such as moving liquids ... are remarkably versatile: they transport mucus and expel ...
(Date:7/28/2014)... of two additional coral communities showing signs of damage from ... the 2010 spill in the Gulf of Mexico. The discovery ... of biology at Penn State University. A paper describing this ... the Gulf of Mexico will be published during the last ... the journal Proceedings of the National Academy of Sciences ...
Breaking Biology News(10 mins):Preterm children's brains can catch up years later 2Microscopic rowing -- without a cox 2Microscopic rowing -- without a cox 3Impact of Deepwater Horizon oil spill on coral is deeper and broader than predicted 2
... CBD COP 9 today, 29th May, a report setting ... conservation of biodiversity" was presented by the report,s author ... by Minister Sigmar Gabriel of Germany and Stavros Dimas ... to promote a better understanding of the true economic ...
... your week-old peach has helped scientists zero in on ... The paradoxical finding gives scientists a better understanding of ... points to a likely target for pesticide development, says ... of Georgia Schools of Medicine and Graduate Studies. ...
... fruits and vegetables per day and drink green or ... according to a first-of-its-kind study by UCLA cancer researchers. ... levels of natural chemicals called flavonoids in their diet ... important finding since more than 90 percent of lung ...
Cached Biology News:The Economics of Ecosystems and Biodiversity- TEEB 2The Economics of Ecosystems and Biodiversity- TEEB 3The Economics of Ecosystems and Biodiversity- TEEB 4The Economics of Ecosystems and Biodiversity- TEEB 5Fruit fly helps identify protein critical to eggshell formation that may be pesticide target 2Fruit fly helps identify protein critical to eggshell formation that may be pesticide target 3Fruits, vegetables and teas may protect smokers from lung cancer, UCLA researchers report 2
(Date:7/29/2014)... PORTLAND, Oregon , July 29, 2014 ... titled, "Global surgical equipment market (types, applications and geography) ... Analysis, Research, Report, Opportunities, Segmentation and Forecast, 2013 - ... expected to reach $12.1 billion by 2020 registering a ... Due to the breakthrough achieved by the electro surgical ...
(Date:7/29/2014)... Philadelphia’s newest entrepreneurial incubation space is ready for ... The Innovation Center @3401 , a collaborative effort of ... to help attract and nurture start-up businesses in the ... , The Innovation Center @3401 (ic@3401), which is ... the new home of DreamIt Ventures and ...
(Date:7/29/2014)... 2014  United Therapeutics Corporation (NASDAQ: ... results for the second quarter ended June 30, ... that our medicines are reaching increasing numbers ... (PAH)," said Martine Rothblatt, Ph.D., United Therapeutics, ... launch this quarter of our extended-release tablet ...
(Date:7/29/2014)... Dr. Jason Wendel – recipient of a Regional Top Doctor ... 10 Plastic Surgeon Specialists for Nashville, TN – has released ... includes a Hydration Booster, Retexturing Night Crème, and Anti-aging C ... younger, more radiant appearance while protecting them from the sun’s ... why at Dr. J. J. Wendel Plastic Surgery, we have ...
Breaking Biology Technology:Global Surgical Equipment Market is expected to reach $12.1 billion by 2020 - Allied Market Research 2Global Surgical Equipment Market is expected to reach $12.1 billion by 2020 - Allied Market Research 3Innovation Center @3401 Opens for Business; DreamIt Ventures and Point.io First Residents 2Innovation Center @3401 Opens for Business; DreamIt Ventures and Point.io First Residents 3United Therapeutics Corporation Reports Second Quarter 2014 Financial Results 2United Therapeutics Corporation Reports Second Quarter 2014 Financial Results 3United Therapeutics Corporation Reports Second Quarter 2014 Financial Results 4United Therapeutics Corporation Reports Second Quarter 2014 Financial Results 5United Therapeutics Corporation Reports Second Quarter 2014 Financial Results 6United Therapeutics Corporation Reports Second Quarter 2014 Financial Results 7United Therapeutics Corporation Reports Second Quarter 2014 Financial Results 8United Therapeutics Corporation Reports Second Quarter 2014 Financial Results 9United Therapeutics Corporation Reports Second Quarter 2014 Financial Results 10United Therapeutics Corporation Reports Second Quarter 2014 Financial Results 11United Therapeutics Corporation Reports Second Quarter 2014 Financial Results 12United Therapeutics Corporation Reports Second Quarter 2014 Financial Results 13Dr. J. J. Wendel Launches New Line of Skin Care Products 2
... and Jack Ballantyne, Forensic Biochemistry/Genetics Professor at University of ... join ... GenVault Corporation today,announces that two leading industry experts, ... its Scientific Advisory Board. Dr.,Lai-Goldman is currently the Chief ...
... primer, now in its 3rd edition., ... the third,edition of Building Biotechnology, the definitive ... business courses. This new,edition adds over 100 ... new,and updated figures and tables, and many ...
... -- Record consolidated revenues of $14.9 million -- Record ... $2.3 million - 49% growth ... credit facility - expands capital resources, -- Reported MIS procedure times of 60 minutes and hospital ... days or ...
Cached Biology Technology:GenVault Expands Scientific Advisory Board 2GenVault Expands Scientific Advisory Board 3New Book on the Business of Biotechnology 2AtriCure Reports Record Second Quarter 2008 Financial Results 2AtriCure Reports Record Second Quarter 2008 Financial Results 3AtriCure Reports Record Second Quarter 2008 Financial Results 4AtriCure Reports Record Second Quarter 2008 Financial Results 5AtriCure Reports Record Second Quarter 2008 Financial Results 6AtriCure Reports Record Second Quarter 2008 Financial Results 7AtriCure Reports Record Second Quarter 2008 Financial Results 8
... The ProteoSpin CBED Maxi Kit provides a ... of dilute protein solutions for buffer exchange, and ... samples. The kit is based on spin-column chromatography ... exchanger. Salts such as MgCl 2 , NaCl, ...
Formula variant: With the macro- and micronutrients as described by Lloyd and McCown (1981). Preparation Quantity Equivalency: Formulated to contain 2.3 grams of powder per liter of medium. Physical ...
... separation and fractionation of nucleic-acid ... nuclei from cytosolic proteins A ... greatly facilitating study of low-abundance ... acid binding proteins (e.g., transcription ...
... PEP-126 is an 18 amino acid synthetic peptide whose sequence corresponds ... this peptide is (amino to carboxy terminus): M(1) - A - ... - A - S - P - R - D - ... This peptide may be used for neutralization and control experiments with ...
Biology Products: