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:7/30/2015)... VIEW, Calif. , July 30, 2015 /PRNewswire/ ... and services for gene function analysis and biomarker ... Guide RNA (sgRNA) Knockout Library targeting all human ... specifically and permanently "knock out" a gene,s function. ... provides a high throughput screening tool so that ...
(Date:7/21/2015)... , July 21, 2015 Today, ZTE ... Already received as well as expected revenues in 2015 that relate ... FPC,s communicated revenue guidance of approximately 2,200 MSEK for 2015. ... is a leading smartphone manufacturer in China ... FPC1 02 5 for Axon , ...
(Date:7/13/2015)... , Jul. 13, 2015 NXT-ID, Inc. (NASDAQ: ... biometric authentication company focused on the growing mobile ... provisional patent 62/188684 for BEHAVIORAL-DIRECTED AUTHENTIATION ... new convenient and secure method to make payments.  ... payment methods, introduced with its groundbreaking voice-direct payment ...
Breaking Biology News(10 mins):CELLECTA, INC. Announces Launch of Human Whole Genome CRISPR Knockout Library 2FPC's Touch Fingerprint Sensor FPC1025 in ZTE's Smartphone Axon 2NXT-ID Patents Behavior-Directed Payments 2NXT-ID Patents Behavior-Directed Payments 3NXT-ID Patents Behavior-Directed Payments 4
... a climate as prone to extremes as Canada,s, buildings ... innovative solutions are being explored through the NSERC Smart ... initiative headquartered at Concordia, which has just received $1 ... "Through the ecoENERGY Innovation Initiative, our Government ...
... MNMay 2, 2013UnitedHealth Group and the Minneapolis Heart Institute ... of New Ulm, Minn., recently announced two grants from ... will fund weight management and nutrition initiatives for Hearts ... a research and demonstration project with a goal of ...
... to announce the launch of Environmental Science & ... accelerate the pace of research across the environmental field ... leading publishing outlet to highlight urgent critical findings in ... release its first issue January 2014 and open for ...
Cached Biology News:$1 million for smart energy solutions 2UnitedHealth Group grants more than $1 million for the heart of New Ulm project 2New ACS journal Environmental Science and Technology Letters to rapidly publish urgent research 2New ACS journal Environmental Science and Technology Letters to rapidly publish urgent research 3
(Date:8/3/2015)... 2015 E-QURE Corp. (OTCQB: EQUR), ... Bio-electrical Signal Therapy device ("BST Device"), a new and ... heal chronic wounds, today announced that the Company has ... distributor specializing in medical devices, for the marketing and ... a 70 years old, sales, marketing and distribution company ...
(Date:8/3/2015)... NEW YORK , August 3, 2015 ... "Global Market Study on 3D Cell Culture: ... published by Persistence Market Research, the global 3D cell culture ... is expected to expand at a CAGR of 29.1% ... View Full Report with TOC:  http://www.persistencemarketresearch.com/market-research/3d-cell-cultures-market.asp ...
(Date:8/3/2015)... ... 2015 , ... Sterlitech Corporation introduces the compact, quiet, and ... laboratory equipment. With optimized features, such as PTFE-coated contact surfaces, an oil-free design, ... solution for a broad range of vacuum filtration applications. , Featuring a 1/7 ...
(Date:7/31/2015)... ... July 31, 2015 , ... Global ... and premium industry insights on the global resorcinol industry. The report highlights the ... of vivid market scenarios and analysis of primary and secondary inputs from the ...
Breaking Biology Technology:E-QURE Corp Signs Second Distribution Agreement in Israel 2E-QURE Corp Signs Second Distribution Agreement in Israel 3Global 3D Cell Culture Market Will Reach US$ 2,717.6 Million by 2020: Persistence Market Research 2Global 3D Cell Culture Market Will Reach US$ 2,717.6 Million by 2020: Persistence Market Research 3Global 3D Cell Culture Market Will Reach US$ 2,717.6 Million by 2020: Persistence Market Research 4Sterlitech Launches New Line of Vacuum Pumps 2Resorcinol Market to Grow at 6% CAGR to 2019 Says New Research Report at ReportsnReports.com 2Resorcinol Market to Grow at 6% CAGR to 2019 Says New Research Report at ReportsnReports.com 3Resorcinol Market to Grow at 6% CAGR to 2019 Says New Research Report at ReportsnReports.com 4
... Area Economic Development Corporation 's annual business-plan contest is starting ... the best business ideas from Eau Claire County. , ,For ... on March 29. Then entrants in the Creating Your ... prepare their applications. , ,Businesses judged to have the best ...
... Metavante Corporation has completed its acquisition of ... says it is expanding its Healthcare Payments Solutions ... Reynolds, who previously served as senior vice president ... Wells Fargo Institutional Trust Service, will become president ...
... , a local software and consulting firm, has teamed ... a new geographic information systems application, the companies said ... to create and distribute land records data through a ... challenges faced by organizations trying to maintain and distribute ...
Cached Biology Technology:
... ULS cDNA Synthesis and Labeling Kit generates ... experiments. First unmodified cDNA is made via ... using an Oligo(dT) primer. Unlike other methods, ... in the reverse transcription reaction. This unmodified ...
... enables fully automated hybridization of microarrays on ... been designed to offer researchers improved reproducibility, ... perform a wide range of applications. ... 485C; denaturations of up to 99C. The ...
... The user-friendly Eppendorf Thermomixer R offers ... that require shaking, heating, and cooling. ... expanded its application and temperature control ... each accommodate 24 micro test tubes, ...
... a high quality microarray scanner based on patented ... and spatial resolution. The DNAscope LM is ... microarray scanner that is upgradeable to a total ... Includes control module (computer), monitor, ...
Biology Products: