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:7/11/2014)... 2014 Researchers have pioneered a revolutionary new ... technology, called Virtual Finger, allows scientists to move ... and synapses using the flat surface of their ... imaging studies orders of magnitude more efficient, saving ... across many areas of experimental biology. The software ...
(Date:7/11/2014)... hippocampus, the marginal division of the striatum is ... the impact degree of substance P in the ... Yan Yu and his team, College of Biophotonics, ... staining, that substance P receptor, neurokinin 1 was ... division of normal rats. Unilateral or bilateral injection ...
(Date:7/11/2014)... DUBLIN , July 11, 2014 ... the "International Biometrics Technology Market - Industry Analysis ... report to their offering. ... attacks and crimes has created a need for high ... methods used for personnel authentication such as username and ...
Breaking Biology News(10 mins):Virtual finger enables scientists to navigate and analyze complex 3D images 2International Biometrics Technology Market - Industry Analysis Size Share Growth Trends and Forecast to 2019 2
... the Hebrew University of Jerusalem have achieved, for the ... cells of Fragile X patients. The discovery paves the ... gene expression in Fragile X patients. Fragile X ... retardation, affecting hundreds of thousands of patients worldwide. The ...
... differences between plants and animals, subtle ones lie concealed within ... animal cells, the nucleus contains DNA, which condenses into ... counted at that stage, revealing the chromosome number ... number spans a relatively short range across animal species (2-296: ...
... (Santa Barbara, Calif.) After an announcement by federal ... searching for a way to treat Alzheimer,s Disease are ... them to test a therapy for a genetically predestined ... incredible," said UC Santa Barbara neuroscientist Ken Kosik, who ...
Cached Biology News:Stem cell research paves way for progress on dealing with Fragile X retardation 2Does polyploidy play a role in the onset of the Italian endemic flora? 2Clinical trials for Alzheimer's disease preventative drug to begin early 2013 2Clinical trials for Alzheimer's disease preventative drug to begin early 2013 3
(Date:7/11/2014)... July 11, 2014 BCC Research ( ... DIGITAL POLYMERASE CHAIN REACTION (PCR) TECHNOLOGY: GLOBAL MARKETS , ... technology reached nearly $140 billion in 2013. This is ... a five-year compound annual growth rate (CAGR) of 28.6%. ... of interesting and exciting possibilities within the broader PCR ...
(Date:7/11/2014)... 11, 2014 Cayenne Medical, Inc., ... in the soft tissue reconstruction segment, announced the ... for surgeries involving the shoulder and extremities. The ... novel, inserter-controlled deployment method. The unique delivery eliminates ... anchor pull-out, or anchor displacement (also commonly know ...
(Date:7/10/2014)... 2014 Understanding the need for better ... and the gap that currently exists in this area, ... industry-leading portfolio of validated ion channel and GPCR cell ... lines, as ion channels control many critical physiological functions ... creates the potential to treat a variety of human ...
(Date:7/10/2014)... (PRWEB) July 10, 2014 OMICS Group’s ... techniques during 18-20 August, 2014 at Double Tree by ... the recent developments in Analytical & Bioanalytical research methods ... , Speaking on this occasion, Dr. Srinubabu Gedela, MD ... Acta conference is a remarkable one in bringing a ...
Breaking Biology Technology:Global Market for Digital Polymerase Chain Reaction Technology to Reach $490 Billion by 2018; Equipment Sector Accounts for the Fastest Growing Segment With 33% CAGR 2Global Market for Digital Polymerase Chain Reaction Technology to Reach $490 Billion by 2018; Equipment Sector Accounts for the Fastest Growing Segment With 33% CAGR 3Cayenne Medical Launches SureLock™ All-Suture Anchor System for Shoulder and Extremity Surgery 2Cayenne Medical Launches SureLock™ All-Suture Anchor System for Shoulder and Extremity Surgery 3Leader in Ion Channel Research Announces Newly Validated and Re-Engineered Cells 2Leader in Ion Channel Research Announces Newly Validated and Re-Engineered Cells 3A Critical Review of Analytical Techniques for Improved Living Standards 2A Critical Review of Analytical Techniques for Improved Living Standards 3A Critical Review of Analytical Techniques for Improved Living Standards 4
... Madison Internet service provider SupraNet plans to ... the Aidmatrix Foundation, a global disaster-relief firm run by ... CEO Bryan Chan said in a press release that ... number of recent disasters the charity is responding to, ...
... of Wisconsin-Madison MBA program was ranked 51st in ... U.S. public university programs by the London Financial Times ... , ,These rankings are based on alumni careers and ... data provided by the schools and a survey of ...
... development assessment group for its high quality of life and ... States, released last week by the non-profit Corporation for Enterprise ... in business vitality and development capacity, based on 2004 data. ... subcategories that made up those three overall marks. , ,Perhaps ...
Cached Biology Technology:
Syd-2 (cL-19)...
Anti-MD-2 (IN) Host: rabbit polyclonal Species Reactivity: human, mouse, rat Applications: WB, IHC Storage: 4C...
TNFalpha-IP 2 (G-17)...
The product contains 2 ml Dynabeads® Epoxy (4.5 μm). Supplied at 4 x 10e8 beads/ml...
Biology Products: