Navigation Links
Ice Age extinction claimed highly carnivorous Alaskan wolves

The extinction of many large mammals at the end of the Ice Age may have packed an even bigger punch than scientists have realized. To the list of victims such as woolly mammoths and saber-toothed cats, a Smithsonian-led team of scientists has added one more: a highly carnivorous form of wolf that lived in Alaska, north of the ice sheets.

Wolves were generally thought to have survived the end-Pleistocene extinction relatively unscathed. But this previously unrecognized type of wolf appears to have vanished without a trace some 12,000 years ago.

The study, which will be published in the June 21 online issue of Current Biology, combined genetic and chemical analyses with more conventional paleontological study of the morphology, or form, of the fossilized skeletal remains. This multifaceted approach allowed the researchers to trace the ancient wolves’ genetic relationships with modern-day wolves, as well as understand their role in the ancient ecosystem.

“Being able to say all of those things—having a complete picture—is really unusual,” said lead author Jennifer Leonard, a research associate with the Smithsonian Genetics Program, and currently at Uppsala University in Sweden.

The researchers extracted mitochondrial DNA from the fossil wolf bones preserved in permafrost and compared the sequences, called haplotypes, with those of modern-day wolves in Alaska and throughout the world. The fossils showed a wide range of haplotypes—greater in fact than their modern counterpart—but there was no overlap with modern wolves. This was unexpected.

“We thought possibly they would be related to Asian wolves instead of American wolves because North America and Asia were connected during that time period. That they were completely unrelated to anything living was quite a surprise,” Leonard said.

The result implies that the Alaskan wolves died out completely, leaving no modern descendents. After the extinction, the Alas
'"/>

Source:Smithsonian


Page: 1 2

Related biology news :

1. Low level of extinction during ice age linked to adaptability
2. Super predators and mass extinctions
3. Small species back-up giant marsupial climate change extinction claim
4. FSU scientist warns North Atlantic right whale facing extinction
5. Size matters: Preventing large mammal extinction
6. Climate model links higher temperatures to prehistoric extinction
7. Traditional models underestimate extinction rates
8. New study pinpoints epicenters of Earths imminent extinctions
9. Ocean dead zones trigger sex changes in fish, posing extinction threat
10. Genetic study shows humans have pushed orangutans to the brink of extinction
11. Climate change drives widespread amphibian extinctions
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Ice Age extinction claimed highly carnivorous Alaskan wolves

(Date:8/19/2014)... other science courses are increasingly being asked to ... have a new textbook to help them do ... month by Princeton Press and co-authored by scientists ... Synthesis (NIMBioS), teaches readers about basic mathematical and ... and explain biological phenomena. , Suitable for entry-level ...
(Date:8/19/2014)... LIVERPOOL, UK 19 August 2014: An engineer at ... around, despite not having a brain to communicate with ... at Harvard, Professor L Mahadevan, has developed a mathematical ... traditional view of how these soft bodied animals get ... of the central pattern generator (CPG) which states that ...
(Date:8/19/2014)... to treat pain, but its effect on pain ... a recent study reported on the Neural ... rat models of an avulsion injury to the ... neuropathic pain) were given electroacupuncture stimulation at bilateral ... (GB34). After electroacupuncture therapy, chronic neuropathic pain in ...
Breaking Biology News(10 mins):New textbook introduces undergraduates to mathematics for the life sciences 2Secrets of how worms wriggle uncovered 2
... have elucidated a key mechanism by which cancer cells ... and raw materials required to sustain runaway growth. ... Ludwig Cancer Research study also reveals how the aggressive ... therapies that should disrupt this capabilityknown as the Warburg ...
... animals will choose to steer clear of dirt but their ... risk of disease as a result. A study of ... near to used nesting material and droppings left by other mice. ... opportunity to eat outweighs an increased risk of disease from other ...
... to learn that individual "molecular muscles" within cells respond to ... cells "feel" the environment and appropriately adapt their shapes and ... 20 in the journal Nature Materials , specifically sheds ... internal signals. A computer model the researchers developed, ...
Cached Biology News:Targeting cancer's sweet tooth 2Targeting cancer's sweet tooth 3Clean living is a luxury wild animals can't afford, study suggests 2Cells' 'molecular muscles' help them sense and respond to their environments 2Cells' 'molecular muscles' help them sense and respond to their environments 3
(Date:8/18/2014)... 2014 Deep Research Report on Global ... in-depth research report on the China Linalool market. ... its definition, classification, application, and industry chain structure ... the international market analysis, including China’s domestic market ... environment & economic situation analysis. The report on ...
(Date:8/18/2014)... Sterne, Kessler, Goldstein & Fox P.L.L.C. , an intellectual ... , announced today that it has filed eleven petitions ... U.S. Patent and Trademark Office (USPTO) on behalf of ... BRLI).  These IPR petitions aim to nullify eleven patents ... patents have been asserted against GeneDx in patent infringement ...
(Date:8/18/2014)... According to the new ... (Municipal Wastewater Treatment and Industrial Wastewater Treatment), By ... By Configuration (Internal/Submerged and External/Sidestream), and By Region-Trends ... market for membrane bioreactor systems is projected to ... CAGR of 15.28% between 2014 and 2019. ...
(Date:8/18/2014)... 18. August 2014 Vier führende ... internationale klinische Studie auf, in der eine ... soll das Sehvermögen bei allen Entfernungen verbessern, ... möglicherweise keine Lese- oder Gleitsichtbrille mehr benötigen. ... FluidVision Accommodating Intraocular Lens (FluidVision ...
Breaking Biology Technology:Linalool Industry & Diphenylamine Market (Global, China) 2014 Analysis Now Available at DeepResearchReports.com 2Linalool Industry & Diphenylamine Market (Global, China) 2014 Analysis Now Available at DeepResearchReports.com 3Linalool Industry & Diphenylamine Market (Global, China) 2014 Analysis Now Available at DeepResearchReports.com 4Sterne Kessler Files 11 IPR Petitions On Behalf Of GeneDx, Inc., Subsidiary Of BioReference Laboratories, Inc. 2Sterne Kessler Files 11 IPR Petitions On Behalf Of GeneDx, Inc., Subsidiary Of BioReference Laboratories, Inc. 3Membrane Bioreactor Systems Market Worth $2,927 Million by 2019 2Membrane Bioreactor Systems Market Worth $2,927 Million by 2019 3Implantation einer revolutionären akkommodativen Linse bei Katarakt-Patienten in deutschen Augenzentren im Rahmen einer internationalen klinischen Studie 2Implantation einer revolutionären akkommodativen Linse bei Katarakt-Patienten in deutschen Augenzentren im Rahmen einer internationalen klinischen Studie 3Implantation einer revolutionären akkommodativen Linse bei Katarakt-Patienten in deutschen Augenzentren im Rahmen einer internationalen klinischen Studie 4
... Ariz., April 23 ImaRx Therapeutics,Inc. (Nasdaq: ... into an agreement,with Abbott Laboratories pursuant to which ... non-recourse promissory note with Abbott issued in,connection with ... title to,the urokinase assets, including the remaining inventory ...
... (NYSE: SGP ) today announced two agreements ... in Europe. These agreements are,in connection with conditions ... its October 2007 clearance of Schering-Plough,s acquisition of ... In two separate agreements, Pfizer and Virbac, ...
... today,announced that on April 22, 2008 its management ... Emerging Business Awards, known as the "Bennies.",BioNanomatrix won ... group of growing entrepreneurial firms in the Philadelphia ... the,award on behalf of the company., The ...
Cached Biology Technology:ImaRx Therapeutics Satisfies Abbott Note Obligation Associated With the Acquisition of Urokinase 2ImaRx Therapeutics Satisfies Abbott Note Obligation Associated With the Acquisition of Urokinase 3Schering-Plough Announces Planned Divestiture of Select Animal Health Products in Europe 2BioNanomatrix Named 'Best Management Team' at the 2008 Ben Franklin Emerging Business Awards 2
PFK-2 car (P-17)...
... contains 5 ml Dynabeads Epoxy (4.5 m). ... (epoxy) reactive groups. Ideal for coupling of ... hydrophobically on initial coupling with covalent binding ... and sulphydryll groups (SH)) occurring within 16-20 ...
LTBP-2 (7B10)...
... [198C679.2.1] to Presenilin 2 Alzheimer's disease ... the disease carry mutations in the presenilin ... protein (APP). These disease-linked mutations result in ... amyloid-beta (main component of amyloid deposits found ...
Biology Products: