Navigation Links
Evidence contradicts idea that starvation caused saber-tooth cat extinction
Date:12/26/2012

tilized carcasses more fully and likely competed more intensely for food than present-day large carnivores."

The latest study uses a new technique, called dental microwear texture analysis (DMTA), developed by co-authorPeter Ungar at the University of Arkansas. It uses a confocal microscope to produce a three-dimensional image of the surface of a tooth. The image is then analyzed for microscopic wear patterns. Chowing down on red meat produces small parallel scratches. Chomping on bones adds larger, deeper pits. Previous methods of dental wear analysis relied on researchers to identify and count these different types of features. DMTA relies on automated software and is considered more accurate because it reduces the possibility of observer bias.

DeSantis and Ungar, with the assistance of Blaine Schubert from East Tennessee State University and Jessica Scott from the University of Arkansas, applied DMTA to the fossil teeth of 15 American lions (Panthera atrox) and 15 saber-tooth cats (Smilodon fatalis) recovered from the La Brea tar pits in Los Angeles.

Their analysis revealed that the wear pattern on the teeth of the American lion most closely resembled those of the present-day cheetah, which actively avoids bones when it feeds. Similarly, the saber-tooth cat's wear pattern most closely resembled those of the present-day African lion, which indulges in some bone crushing when it eats. (This differs from a previous microwear study using a different technique that concluded saber-tooth cats avoided bone to a far greater extent.)

The researchers examined how these patterns changed over time by selecting specimens from tar pits of different ages, ranging from about 35,000 to 11,500 years ago. They did not find any evidence that the two carnivores increased their "utilization" of carcasses throughout this period. If anything, their analysis suggests that the proportion of the carcasses that both kinds of cats consumed ac
'/>"/>

Contact: David Salisbury
david.salisbury@vanderbilt.edu
615-343-6803
Vanderbilt University
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. Chinese scientists discover evidence of giant pandas population history and local adaptation
2. First evidence of fish sensing geomagnetic fields from a Czech Christmas market
3. First evidence of ocean acidification affecting live marine creatures in the Southern Ocean
4. New evidence of dinosaurs role in the evolution of bird flight
5. More evidence needed to support use of autism interventions
6. Mobile phones and wireless networks: No evidence of health risk found
7. Researchers find first evidence for a genetic cause for Barretts oesophagus
8. First photo evidence of snub-nosed monkey species in China
9. Alpine Fault study shows new evidence for regular magnitude 8 earthquakes
10. Caltech researchers find evidence of link between immune irregularities and autism
11. Cancer Cell article shows first evidence for targeting of Pol I as new approach to cancer therapy
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Evidence contradicts idea that starvation caused saber-tooth cat extinction
(Date:7/30/2014)... published new research from Bjorn Brembs, professor of neurogenetics ... with a proof-of-concept figure allowing readers and reviewers to ... This represents an important leap forward for scientific publishing, ... quality of a scholarly output. , Figure 3 in ... and their code to F1000Research , and the ...
(Date:7/30/2014)... therapies for spinal cord injury (SCI), traumatic brain injury ... great deal has been learned over the past 30 ... factors that regulate axon growth, but this large body ... therapeutics. Prof. Lemmon and his team from University of ... root causes, but a consensus is emerging that one ...
(Date:7/30/2014)... a paper published online today in the journal ... researchers Evan Kodra and Auroop Ganguly found that while ... variability in temperature extremes. For instance, while each year,s ... averages will also tend to fall within a wider ... are currently being observed. This means that even as ...
Breaking Biology News(10 mins):F1000Research brings static research figures to life 2Big data confirms climate extremes are here to stay 2
... 11, 2013 Elsevier, a world-leading provider of scientific, ... launch of Journal of Forensic Radiology and Imaging ... the International Society of Forensic Radiology and Imaging (ISFRI). ... of forensic radiology and imaging, JOFRI aims ...
... Discovery , the flagship journal of the American Association ... American research centres, presents significant results in treating cancer ... This marks the first time that the therapeutic effect ... Barcelona, 11 February 2013. A study led by Dr ...
... By thinking of cells as programmable robots, researchers at Rice ... tiny blood vessels that feed the brain and help people ... Amina Qutub and her colleagues simulate patterns of microvasculature cell ... their lab. Eventually, they want to develop the ability to ...
Cached Biology News:Elsevier announces the launch of a new journal: Journal of Forensic Radiology and Imaging 2First-in-man study demonstrates the therapeutic effect of RNAi gene silencing in cancer treatment 2First-in-man study demonstrates the therapeutic effect of RNAi gene silencing in cancer treatment 3Rice University lab show how blood vessels regroup after stroke 2Rice University lab show how blood vessels regroup after stroke 3
(Date:7/30/2014)... 2014 With the accelerated aging ... health expenditure as well as the improved medical ... diagnostic reagent industry has been developing quickly, especially ... 2013, Chinese in vitro diagnostics market size reached ... in vitro diagnostic reagents. , Read complete ...
(Date:7/30/2014)... Vycom announces the addition of Thermax PVC to ... Mutual (FM) 4910 fire propagation and smoke generation criteria ... tools, fume hoods, furniture and cabinetry. These criteria reduce ... used in electronic chip manufacturing. , Flametec ... workability and superior aesthetics. It is available in a ...
(Date:7/30/2014)...  Dyadic International, Inc. ("Dyadic") (OTCQX: DYAI), is ... technologies are used to discover, develop, manufacture and ... bio-based chemical, biopharmaceutical and industrial enzyme industries, announced ... Vice President and Chief Financial Officer. Tom will ... technology operations for Dyadic and will succeed ...
(Date:7/30/2014)... July 30, 2014  AtheroNova Inc. (OTCBB: AHRO), ... development of compounds to safely regress atherosclerotic plaque ... that its partner, CardioNova, has accomplished first dosing ... with AtheroNova,s lead compound, AHRO-001.  This Phase 1b ... Phase 1 safety trial completed in February 2014, ...
Breaking Biology Technology:China Diagnostic Reagent Industry Report, 2013-2016 | Researchmoz 2China Diagnostic Reagent Industry Report, 2013-2016 | Researchmoz 3Vycom Announces Flametec® Thermax PVC (FM4910 Listed) For a Variety of Clean Room Applications with Excellent Workability and Aesthetics 2Thomas Dubinski joins Dyadic as Chief Financial Officer 2Thomas Dubinski joins Dyadic as Chief Financial Officer 3Thomas Dubinski joins Dyadic as Chief Financial Officer 4AtheroNova Announces Milestone with Initiation of Phase 1b Clinical Trial of AHRO-001 2AtheroNova Announces Milestone with Initiation of Phase 1b Clinical Trial of AHRO-001 3AtheroNova Announces Milestone with Initiation of Phase 1b Clinical Trial of AHRO-001 4
... 9 Boston Scientific,Corporation (NYSE: BSX ) ... has revised its Rating Outlook on the Company, ... long-term credit rating of,BB+., Fitch said the ... is making toward stabilizing its drug-eluting stent and ...
... Pressure,BioSciences, Inc. (Nasdaq: PBIO ) ("PBI") ... (PNNL), the Harvard School of,Public Health (HSPH), the ... Drug Administration (FDA) presented data generated through the,use ... last week,s,(June 1-5) American Society for Mass Spectrometry,s ...
... Inc. (Nasdaq:,NUVA), a medical device company focused on developing ... today,that Kevin O,Boyle, Executive Vice President and Chief Financial ... Annual Growth Stock,Conference at the Four Season Hotel, Chicago, ... A live Web cast of the presentation will ...
Cached Biology Technology:Boston Scientific Welcomes Revised Outlook From Fitch Ratings 2Boston Scientific Welcomes Revised Outlook From Fitch Ratings 3Four Independent Research Groups Present Data Generated by Pressure Cycling Technology (PCT) at the ASMS Conference on Mass Spectrometry and Allied Topics in Denver, CO 2Four Independent Research Groups Present Data Generated by Pressure Cycling Technology (PCT) at the ASMS Conference on Mass Spectrometry and Allied Topics in Denver, CO 3Four Independent Research Groups Present Data Generated by Pressure Cycling Technology (PCT) at the ASMS Conference on Mass Spectrometry and Allied Topics in Denver, CO 4NuVasive to Present at William Blair 28th Annual Growth Stock Conference 2NuVasive to Present at William Blair 28th Annual Growth Stock Conference 3
MMP-20 Immunogen: Activated recombinant human MMP-2 Storage: -20 C, Avoid Freeze/Thaw Cycles...
Rabbit anti-T-box 6...
Anti-Rsk2/MAPKAP Kinase 1b, #0 SK2/MAPKAP K1 beta Smartpool&t 3T3 cell lysate Non-specific Control Pool , #D 1X Universal Buffer...
...
Biology Products: