Navigation Links
Dinosaurs were warm-blooded reptiles
Date:6/28/2012

The journal Nature has published a study analysing the lines of arrested growth (LAG) in the bones of around a hundred ruminants, representative of the specific and ecological diversity of that group of mammals. The results show that the presence of these lines is not an indicator of an ectothermic physiology (does not generate internal heat), as had previously been thought, since all warm-blooded mammals have them. The study therefore dismantles the key argument of the hypothesis that dinosaurs could have been cold-blooded reptiles. The work was carried out by researchers from the Institut Catal de Paleontologia Miquel Crusafont (ICP), in collaboration with a researcher from the Norwegian Polar Institute.

LAGs are seen in bone sections as dark rings, similar to those seen in tree trunks. The rings are formed, both in the studied mammals and in trees, during the unfavourable seasons (winter or dry season) when the growth of the organism is arrested as a result of a lack of resources. The presence of LAGs in bones was, until now, considered to be the clearest indicator of ectothermy since the seasonal arrest of growth was related to the animal's inability to maintain a more or less constant body temperature (endothermy) during the season of scarce resources.

As the ICREA researcher and ICP palaeontologist Meike Khler explains: The study we have carried out is very powerful, both in terms of the amount of material and the diversity of species with which we worked, but we did not design it to find a response to the thermophysiology of dinosaurs. We sought to better understand the physiology of extant mammals and how the environment affects them how their growth changes as a result of external temperatures, rain and the availability of food and water".

Understanding this was the first step to establishing discussions in paleontological research about the physiology of animals that lived several million years ago.

But
'/>"/>

Contact: Maria Jesus Delgado
MariaJesus.Delgado@uab.cat
34-935-814-049
Universitat Autonoma de Barcelona
Source:Eurekalert

Page: 1 2 3 4 5

Related biology news :

1. Duck-billed dinosaurs endured long, dark polar winters
2. Jurassic pain: Giant flea-like insects plagued dinosaurs 165 million years ago
3. Gaseous emissions from dinosaurs may have warmed prehistoric earth
4. Seismic zones, river deltas, landslides, fossil reptiles, and more new Geology science
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/20/2015)... 2015   Sensory, Inc ., a Silicon ... experience and security of consumer electronics through state-of-the-art ... its TrulySecure™ is the first multimodal ... FIDO Certified™. The FIDO (Fast Identification ... FIDO UAF (Universal Authentication Framework) 1.0 specifications, which ...
(Date:8/19/2015)... N.Y. , Aug. 19, 2015  VOXX ... that it has entered into a Definitive Agreement ... property, of iris authentication market leader EyeLock through ... VOXX will have a controlling interest in the ... subject to completion of due diligence.  Expanding on ...
(Date:8/18/2015)... , Aug. 17, 2015 Research and ... of the "Global Biometric Authentication & Identification ... Estimation & Forecast, 2015-2020" report to their ... and identification systems market is expected to grow ... to 2020 and generate over $25 billion (approximately) ...
Breaking Biology News(10 mins):TrulySecure From Sensory Becomes First Face and Voice Biometrics Technology to be FIDO UAF Certified 2TrulySecure From Sensory Becomes First Face and Voice Biometrics Technology to be FIDO UAF Certified 3TrulySecure From Sensory Becomes First Face and Voice Biometrics Technology to be FIDO UAF Certified 4TrulySecure From Sensory Becomes First Face and Voice Biometrics Technology to be FIDO UAF Certified 5VOXX International Corporation Signs Definitive Agreement To Acquire The Assets And A Controlling Interest Of Biometric Leader EyeLock 2VOXX International Corporation Signs Definitive Agreement To Acquire The Assets And A Controlling Interest Of Biometric Leader EyeLock 3VOXX International Corporation Signs Definitive Agreement To Acquire The Assets And A Controlling Interest Of Biometric Leader EyeLock 4VOXX International Corporation Signs Definitive Agreement To Acquire The Assets And A Controlling Interest Of Biometric Leader EyeLock 5Global Biometric Authentication & Identification Market 2015: Focus On Modality, Motility & Application - Estimation & Forecasts to 2020 for the $25 Billion Industry 2
... Advanced Iris Recognition Algorithm Detects and Compensates for ... ... Neurotechnology today,announced the addition of VeriEye iris recognition technology ... products. VeriEye SDK features an advanced iris recognition,algorithm that ...
... Stanley, Inc. (NYSE:,SXE), a leading provider of ... government, announced today that it has entered into ... an,engineering, intelligence operations and information technology services,company. The ... cash,subject to certain working capital and other adjustments ...
... AMBER Alert Safety Centers,Inc. announced today that the Company ... Fair, to be held at the Meadowlands Sport,Complex in East ... the entire family featuring rides, free entertainment, games, exhibits,shopping and ... Patterson -- Chief Executive Officer ...
Cached Biology News:New VeriEye SDK from Neurotechnology Enables Development of Reliable, Cost-effective Biometric Iris Recognition Systems 2New VeriEye SDK from Neurotechnology Enables Development of Reliable, Cost-effective Biometric Iris Recognition Systems 3Stanley to Acquire Oberon Associates 2Stanley to Acquire Oberon Associates 3Stanley to Acquire Oberon Associates 4AMBER Alert Safety Centers to Provide Child Safety Precautions at the New Jersey State Fair at the Meadowlands 2AMBER Alert Safety Centers to Provide Child Safety Precautions at the New Jersey State Fair at the Meadowlands 3
(Date:8/27/2015)... Aug. 27, 2015 The National Necrotizing ... eyes—and life—were saved by doctors at Vanderbilt University Hospital ... NNFF, NovaBay Pharmaceuticals and Dr. John Crew , ... at Seton Medical Center in Daly City, ... a breakthrough approach, pioneered by Dr. Crew, that had ...
(Date:8/27/2015)... ... 2015 , ... Inc. Magazine released its annual list of the 5,000 fastest-growing ... growth for the three years through 2014. Being named to the Inc. 5000 list ... the country. , “We are thrilled to make the Inc. 5000 list for ...
(Date:8/26/2015)... 26, 2015 /PRNewswire/ - iCo Therapeutics ("iCo" or "the ... results for the quarter ended June 30, 2015. ... dollars and presented under International Financial Reporting Standards ... respect to our Oral Amp B program, rapidly ... said Andrew Rae , President & CEO ...
(Date:8/26/2015)... Md. , Aug. 26, 2015 Intrexon ... biology, announced today the closing of its previously announced ... full by the underwriters of their option to purchase ... public offering price of $41.00 per share.  The exercise ... shares of common stock sold by Intrexon to 5,609,756 ...
Breaking Biology Technology:Patient's Life and Eyes Saved from Gruesome Flesh-Eating Infection Consuming Her Face 2Patient's Life and Eyes Saved from Gruesome Flesh-Eating Infection Consuming Her Face 3iLab Solutions Named to 2015 Inc. 5000 List 2iLab Solutions Named to 2015 Inc. 5000 List 3iCo Therapeutics Announces Second Quarter 2015 Financial Results 2iCo Therapeutics Announces Second Quarter 2015 Financial Results 3Intrexon Announces Closing of $230 Million Public Offering of Common Stock including Full Exercise of Underwriters' Option to Purchase Additional Shares 2Intrexon Announces Closing of $230 Million Public Offering of Common Stock including Full Exercise of Underwriters' Option to Purchase Additional Shares 3Intrexon Announces Closing of $230 Million Public Offering of Common Stock including Full Exercise of Underwriters' Option to Purchase Additional Shares 4
... (NASDAQ: XTLB ; LSE: XTL; TASE: XTL) ... Officer, is scheduled to present at the,Acumen BioFin ... Mr.,Bentsur will present an overview of the Company ... compound for the treatment of,neuropathic pain. Mr. Bentsur,s ...
... HOUSTON, Oct. 26, 2007 -- The birth secret of ... a strand of DNA -- has been caught on ... University. An electron microscope video and computer simulations show ... distorted, unstable sheets of graphite, shedding loosely connected threads ...
... catalog of nanoscale technologies, nanowirestiny rows of conductor ... interest for their potential to build unique atomic-scale ... your local Nano Depot, manufacturers will need efficient, ... at the National Institute of Standards and Technology ...
Cached Biology Technology:XTL Biopharmaceuticals to Present at the Rodman & Renshaw 9th Annual Health Care Conference 2Video shows buckyballs form by 'shrink wrapping' 2NIST demos industrial-grade nanowire device fabrication 2
...
... E. coli is an endoribonuclease that specifically ... that have 2-base, 3'-overhangs. Complete digestion ... 12-15 bp. RNase III can digest ... well as DuraScript™ RNA, produced using EPICENTRE's ...
Rabbit polyclonal to Peptide E ( Abpromise for all tested applications)....
Mouse monoclonal [6911] to E. coli K99 pilus ( Abpromise for all tested applications)....
Biology Products: