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

In the period just before they went extinct, the American lions and saber-toothed cats that roamed North America in the late Pleistocene were living well off the fat of the land.

That is the conclusion of the latest study of the microscopic wear patterns on the teeth of these great cats recovered from the La Brea tar pits in southern California. Contrary to previous studies, the analysis did not find any indications that the giant carnivores were having increased trouble finding prey in the period before they went extinct 12,000 years ago.

The results, published on Dec. 26 in the scientific journal PLOS ONE, contradicts previous dental studies and presents a problem for the most popular explanations for the Megafaunal (or Quaternary) extinction when the great cats, mammoths and a number of the largest mammals that existed around the world disappeared.

"The popular theory for the Megafaunal extinction is that either the changing climate at the end of the last Ice Age or human activity or some combination of the two killed off most of the large mammals," said Larisa DeSantis, assistant professor of earth and environmental sciences at Vanderbilt, who headed the study. "In the case of the great cats, we expect that it would have been increasingly difficult for them to find prey, especially if had to compete with humans. We know that when food becomes scarce, carnivores like the great cats tend to consume more of the carcasses they kill. If they spent more time chomping on bones, it should cause detectable changes in the wear patterns on their teeth."

In 1993, Blaire Van Valkenburgh at UCLA published a paper on tooth breakage in large carnivores in the late Pleistocene. Analyzing teeth of American lions, saber-tooth cats, dire wolves and coyotes from La Brea, she found that they had approximately three times the number of broken teeth of contemporary predators and concluded, "...these findings suggest that these species u
'/>"/>

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:7/22/2014)... Institute of Standards and Technology (NIST), working with ... technique for analyzing biological cells and tissues based ... technique is an advanced form of the widely ... signals that are 10,000 times stronger than obtained ... than obtained from comparable "coherent Raman" instruments, and ...
(Date:7/22/2014)... commercial diet programs and pills, the Weight Watchers program ... the money. The Jenny Craig regimen generated the greatest ... tested, according to researchers at Duke-National University of Singapore ... the June issue of the journal Obesity , ... per dollar spent as insurance carriers consider coverage for ...
(Date:7/22/2014)... Nancy Buccola, MSN, APRN, PMHCNS-BC, CNE, Assistant Professor ... New Orleans School of Nursing, contributed samples used ... material associated with schizophrenia and also suggesting a ... The study, Biological insights from 108 schizophrenia-associated genetic ... Nature , available at http://www.nature.com/nature/journal/vaop/ncurrent/full/nature13595.html., ...
Breaking Biology News(10 mins):Enhanced NIST instrument enables high-speed chemical imaging of tissues 2Enhanced NIST instrument enables high-speed chemical imaging of tissues 3Study compares cost-effectiveness of weight-loss programs and drugs 2Study compares cost-effectiveness of weight-loss programs and drugs 3LSUHSC contributes to work identifying new DNA regions associated with schizophrenia 2
... of an embryonic stem cell, which has the potential to ... complex interaction of genes, proteins that bind DNA, and molecules ... paper, biologists from MIT and the University of California at ... of stem cells into mature heart cells. The study, the ...
... ultrasound waves, MIT engineers have found a way to ... drug delivery more efficient. This technology could pave the ... to the researchers. "This could be used for ... systemic drugs and proteins such as insulin, as ...
... Alps that are not native to that region? Which ... How big a threat will they become to local ... today by the European Commission,s in-house science service, the ... answering these and other questions related to 16 000 ...
Cached Biology News:Probing matters of the heart 2Probing matters of the heart 3Getting (drugs) under your skin 2Getting (drugs) under your skin 3Environment: Pooling information to combat the threat of alien species in Europe 2Environment: Pooling information to combat the threat of alien species in Europe 3
(Date:7/22/2014)... SHENZHEN, China , July 22, 2014 /PRNewswire/ ... a subsidiary of BGI, the world,s largest genomics ... new human whole exome sequencing service based on ... includes in-depth bioinformatics analysis and SNP validation, and ... 2014. Complete Genomics, highly regarded ...
(Date:7/22/2014)... CAMBRIDGE, Mass. , July 22, 2014 /PRNewswire/ ... of $650 million from philanthropist Ted Stanley ... disorders and bringing new treatments based on molecular ... the world. The Stanley commitment ... among the largest for scientific research in general ...
(Date:7/22/2014)... PLAINS, New Jersey , 22. Juli 2014 ... für die Life-Sciences-Industrie, hat die Ernennung von Marcus ... bekanntgegeben. Herr Bergler hat die europäischen kommerziellen ... Lösungen unterstützt. Bevor er sich Qforma anschloss, war ... bei Cegedim Customer Information, als Vertriebsteam-Leiter Deutschland bei ...
(Date:7/21/2014)... Lawrence Livermore National Laboratory ... and Las Positas College (LPC) recently established a ... hands-on training for veterans, officials recently announced. , ... Positas is designed to help veterans develop ... careers, and establishes a pipeline of qualified candidates ...
Breaking Biology Technology:BGI Tech Launches Human Whole Exome Sequencing Service on Complete Genomics' Advanced Platform 2BGI Tech Launches Human Whole Exome Sequencing Service on Complete Genomics' Advanced Platform 3$650 million commitment to Stanley Center at Broad Institute aims to galvanize mental illness research 2$650 million commitment to Stanley Center at Broad Institute aims to galvanize mental illness research 3$650 million commitment to Stanley Center at Broad Institute aims to galvanize mental illness research 4$650 million commitment to Stanley Center at Broad Institute aims to galvanize mental illness research 5$650 million commitment to Stanley Center at Broad Institute aims to galvanize mental illness research 6$650 million commitment to Stanley Center at Broad Institute aims to galvanize mental illness research 7$650 million commitment to Stanley Center at Broad Institute aims to galvanize mental illness research 8$650 million commitment to Stanley Center at Broad Institute aims to galvanize mental illness research 9$650 million commitment to Stanley Center at Broad Institute aims to galvanize mental illness research 10Qforma gibt Schaffung des neuen Postens als General Manager in Europa bekannt 2Engineering Program Established for Veterans 2Engineering Program Established for Veterans 3
... MOUNTAIN VIEW, Calif., Feb. 25 Alexza,Pharmaceuticals, ... that it has initiated,its first Phase 3 ... an inhalation product candidate being developed for ... schizophrenia or bipolar disorder. Alexza,believes the novel, ...
... t2cure, a clinical,stage biopharmaceutical company developing novel regenerative ... it has appointed,Dr. Petra Rueck Head of Clinical ... join our company", said Manfred Ruediger,CEO of t2cure. ... be of critical importance to t2cure as we ...
... SAN DIEGO, Feb. 25 Speid & Associates, ... is hosting,a six session Webinar series on diabetes ... and April. Speakers will include former Food and,Drug ... Lipicky, as,well as a distinguished list of other ...
Cached Biology Technology:Alexza Initiates First Phase 3 Clinical Trial for AZ-004 (Staccato(R) Loxapine) 2Alexza Initiates First Phase 3 Clinical Trial for AZ-004 (Staccato(R) Loxapine) 3Alexza Initiates First Phase 3 Clinical Trial for AZ-004 (Staccato(R) Loxapine) 4Alexza Initiates First Phase 3 Clinical Trial for AZ-004 (Staccato(R) Loxapine) 5Stem Cell Company t2cure Appoints Dr Rueck Head of Clinical Operations 2The Diabetes Series 2008: Experts Speak About Developing Diabetes Therapeutics 2
... T Squareds patented high efficiency dynamic valve ... With the most compact, lightweight package in ... use in portable air and gas applications., ... high efficiency. , Includes DC Motor. ...
...
Alkaline Phosphatase (E. coli C75), 100 units. Removes 5'-phosphates from DNA. Category: Nucleotides & Enzymes & Biochemicals, Modifying Enzymes, Alkaline Phosphatases....
... CyScribe First-Strand cDNA Labeling System - ... 50 reactions. For the generation and ... reagents are packaged together for complete ... protocols can be used for performing ...
Biology Products: