Navigation Links
Duck-billed dinosaurs endured long, dark polar winters
Date:4/11/2012

owth that seemed to indicate a pattern.

"What we found was that periodically, throughout their life, these dinosaurs were switching how fast they were growing," said Tumarkin-Deratzian. "We interpreted this as potentially a seasonal pattern because we know in modern animals these types of shifts can be induced by changes in nutrition. But that shift is often driven by changes in seasonality."

The researchers questioned what was causing the dinosaurs to be under stress at certain times during the year: staying up in the polar region and dealing with reduced nutrition during the winter or migrating to and from lower latitudes during the winter.

They did bone microstructure analysis on similar duck-billed dinosaur fossils found in southern Alberta, Canada, but didn't see similar stress patterns, implying that those dinosaurs did not experience regular periodic seasonal stresses. "We had two sets of animals that were growing differently," said Tumarkin-Deratzian.

Since the Alaska fossils had all been preserved in the same sedimentary horizon, Fiorillo examined the geology of the bonebeds in Alaska where the samples were excavated and discovered that these dinosaurs had been preserved in flood deposits.

"They are very similar to modern flood deposits that happen in Alaska in the spring when you get spring melt water coming off the Brooks Mountain Range," said Fiorillo. "The rivers flood down the Northern Slope and animals get caught in these floods, particularly younger animals, which appear to be what happened to these dinosaurs.

"So we know they were there at the end of the dark winter period, because if they were migrating up from the lower latitudes, they wouldn't have been there during these floods," he said.

"It is fascinating to realize how much of information is locked in the bone microstructure of fossil bones," said Chinsamy-Turan. "It's incredible to realize that we can also tell from these 70 mill
'/>"/>

Contact: Preston M. Moretz
pmoretz@temple.edu
215-204-4380
Temple University
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. New duck-billed dinosaur gives scientists clues to evolution of head ornamentation and provinciality
2. Polysternon isonae, a new species of turtle that lived with dinosaurs in Isona
3. Dinosaurs with killer claws yield new theory about flight
4. Skin bones helped large dinosaurs survive, new study says
5. Paleontologist describes large nest of juvenile dinosaurs, first of their genus ever found
6. Tree resin captures evolution of feathers on dinosaurs and birds
7. New Montana State research sheds light on South Pole dinosaurs
8. Jurassic Park had it right: Some dinosaurs hunted by night
9. Living dinosaurs: The evolutionary history of modern birds
10. Test shows dinosaurs survived mass extinction by 700,000 years
11. EARTH: How dinosaurs arose
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Duck-billed dinosaurs endured long, dark polar winters
(Date:11/21/2014)... , Nov. 20, 2014 C-Labs LLC, ... the Internet of Things (IoT), today announced the appointment ... chief operating officer. Previously a strategic advisor to the ... and operations. Mr. Traynor is based out of the ... He reports to Chris Muench , Chief Executive ...
(Date:11/18/2014)...  The Secure Identity & Biometrics Association (SIBA) ... the formation of The Airport Entry and Exit ... and Biometric Entry and Exit Solutions Framework for ... from BORDERPOL, the international non-profit organization that works ... regarding border security, traveler and migration systems. ...
(Date:11/18/2014)... The Parenteral Drug Association (PDA) today confirmed that ... and at least seven more will participate in the upcoming ... Hotel in Washington D.C. , Dec. 2-4. ... support from the regulatory agencies in the United ... our effort to help advance the use of metrics in ...
Breaking Biology News(10 mins):C-Labs Names Former Microsoft and Bsquare Executive as Chief Operating Officer 2Identity Management, Document Authentication and Biometric Companies Form "The Airport Entry and Exit Working Group", Releasing the Framework to Help Guide the Department of Homeland Security and Congress Towards Solutions 2Identity Management, Document Authentication and Biometric Companies Form "The Airport Entry and Exit Working Group", Releasing the Framework to Help Guide the Department of Homeland Security and Congress Towards Solutions 3FDA's Janet Woodcock, EMA's Emer Cooke Headline PDA Quality Metrics Conference 2
... 2013, Shenzhen, China-The China National Genebank (CNGB) announces ... Project (Fish T1K), a groundbreaking transcriptome study designed ... and diversification of the largest group of vertebrates. ... approaches and strategies to address challenges in fish ...
... 650 years of annual change in sea-ice cover can been ... says a new study from the University of Toronto Mississauga ... have been used to track changes in Arctic sea ice," ... Chemical and Physical Sciences. "We found the algal record shows ...
... City, November 18, 2013 Ph.D. student Karita ... Environnement Research Centre, in collaboration with other Canadian, ... emissions produced by thawing permafrost in the Canadian ... climate models. Their findings, published in the journal ...
Cached Biology News:China National Genebank initiates collaboration to sequence transcriptomes of 1,000 fish species 2Underwater 'tree rings' 2Global warming in the Canadian Arctic 2
(Date:12/24/2014)... , Dec. 23, 2014  Rock Creek Pharmaceuticals, Inc., ... has filed a Clinical Trial Application (CTA) with the ... Regulatory Agency (MHRA) seeking regulatory approval to initiate clinical ... Anatabine Citrate. Contingent on the Company receiving ... Phase I trial to assess the safety, tolerability and ...
(Date:12/22/2014)... , Dec. 22, 2014  Alternative Energy ... that it has signed a letter of intent ... has developed and patented a nanotechnology-based development platform ... products that enable rapid on-site collection and testing ... and health issues in an immediate, non-invasive and ...
(Date:12/22/2014)... 22, 2014 Fertility Associates of Memphis ... Bank USA , a network of more than 20 ... partnership, patients have fast access to a national pool ... IVF . Fertility Associates of Memphis is the only ... treatment option. , Dr. William Kutteh , director ...
(Date:12/19/2014)... 19, 2014  Roche (SIX: RO, ROG; OTCQX: RHHBY) ... (Bina), a privately held company based in ... provides a big data platform for centralized management ... Bina,s proprietary on-market Genomic Management Solution, Bina-GMS 1 ... perform fast and scalable analyses to maximize the ...
Breaking Biology Technology:Rock Creek Pharmaceuticals Files Clinical Trial Application in the UK for Clinical Trials of Anatabine Citrate Formulations 2Rock Creek Pharmaceuticals Files Clinical Trial Application in the UK for Clinical Trials of Anatabine Citrate Formulations 3ALNE Announces Intention To Acquire BioTechPharma 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 3Roche acquires Bina Technologies and enters the genomic informatics market 2Roche acquires Bina Technologies and enters the genomic informatics market 3
... SPRING, Md., Aug. 24, 2011 United Therapeutics ... the completion of its FREEDOM-C(2) Phase 3 trial ... release oral formulation of treprostinil, a stable synthetic ... hypertension (PAH).  Preliminary analysis demonstrates that the trial ...
... the Trudeau Institute may help to explain why live ... protection. The research is published in this month,s ... entitled "Live attenuated influenza vaccine (LAIV) impacts innate and ... scientist Dr. Laura Haynes and her colleagues. "Our ...
... ANN ARBOR, Mich.---A delicate balance of atomic forces can ... in size---an attribute that,s important for many nanotech applications ... The same type of forces are at ... the inorganic supercluster structures in this research are in ...
Cached Biology Technology:FREEDOM-C(2) Trial of Oral Treprostinil in Pulmonary Arterial Hypertension Does Not Meet Primary Endpoint 2FREEDOM-C(2) Trial of Oral Treprostinil in Pulmonary Arterial Hypertension Does Not Meet Primary Endpoint 3FREEDOM-C(2) Trial of Oral Treprostinil in Pulmonary Arterial Hypertension Does Not Meet Primary Endpoint 4Trudeau Institute announces a discovery in how FluMist elicits protection 2Engineers discover nanoscale balancing act that mirrors forces at work in living systems 2
Chaperone Sampler Kit 10 mu g each...
Zonula Adherens Sampler Kit 10 mu g each...
Tumor Suppressor Sampler Kit 10 mu g each...
Umbilical cord blood eosinophils, For immunohistochemistry (IHC)...
Biology Products: