Wolves of Alaska became extinct 12,000 years ago, scientists report

The scientists analyzed DNA samples, conducted radio carbon dating and studied the chemical composition of ancient wolves at the Smithsonian Institution’s National Museum of Natural History. They then compared the results with modern wolves and found that the two were genetically distinct.

“The ancient Alaskan gray wolves are all more similar to one another than any of them is to any modern North American or modern Eurasian wolf,” said study co-author Blaire Van Valkenburgh, UCLA professor of ecology and evolutionary biology.

The research was federally funded by the National Science Foundation.

The ancient gray wolves lived in Alaska continuously from at least 45,000 years ago —probably earlier, but radio carbon dating does not allow for the establishment of an earlier date — until approximately 12,000 years ago, Van Valkenburgh said.

The ancient gray wolves were not much different in size from modern Alaskan wolves, although their massive teeth and strong jaw muscles were larger. They were capable of killing large bison, Van Valkenburgh said.

The ancient wolves suffered many broken teeth and tooth fractures, she said.

Van Valkenburgh has also studied tooth fractures in ancient animals at Los Angeles’ Rancho La Brea Tar Pits and in modern lions, tigers, leopards, puma and wolves. The ancient large mammals broke their teeth frequently when they ate, crunching the bones of their prey much more often than their modern counterparts. Why”

“Because they were hungry, which may have been because it was difficult to catch and hold onto prey when there was much competition and theft among carnivores, forcing them to eat quickly,” said Van Valkenburgh, who won a UCLA distinguished teaching award in June. “They were probably living at such high densities that we have difficulty even imagining, with frequent encounters between carnivores.”

The ancient wolves’ competitors for food included lions, saber-toothed cats and enormous short-faced bears, she said.

The saber-toothed cat and other large mammals became extinct about 10,000 to 11,000 years ago when their prey disappeared due to factors that included human hunting and dramatic global warming at the end of the Pleistocene, Van Valkenburgh said.

Prior to the new research, it was not known whether today’s gray wolves in Alaska and elsewhere descended from ancient gray wolves that roamed those areas in the Pleistocene or whether there was an extinction or near extinction of the gray wolves from northern North America.

Does the research have implications for global warming today”

“When environmental change happens very rapidly, animals cannot adapt, especially when the few places for them to move as habitats shrink; they are more likely to go extinct,” Van Valkenburgh said. “It was a rapid climate change in the late Pleistocene.”

Media Contact

Stuart Wolpert EurekAlert!

More Information:

http://www.ucla.edu

All latest news from the category: Life Sciences and Chemistry

Articles and reports from the Life Sciences and chemistry area deal with applied and basic research into modern biology, chemistry and human medicine.

Valuable information can be found on a range of life sciences fields including bacteriology, biochemistry, bionics, bioinformatics, biophysics, biotechnology, genetics, geobotany, human biology, marine biology, microbiology, molecular biology, cellular biology, zoology, bioinorganic chemistry, microchemistry and environmental chemistry.

Back to home

Comments (0)

Write a comment

Newest articles

Lighting up the future

New multidisciplinary research from the University of St Andrews could lead to more efficient televisions, computer screens and lighting. Researchers at the Organic Semiconductor Centre in the School of Physics and…

Researchers crack sugarcane’s complex genetic code

Sweet success: Scientists created a highly accurate reference genome for one of the most important modern crops and found a rare example of how genes confer disease resistance in plants….

Evolution of the most powerful ocean current on Earth

The Antarctic Circumpolar Current plays an important part in global overturning circulation, the exchange of heat and CO2 between the ocean and atmosphere, and the stability of Antarctica’s ice sheets….

Partners & Sponsors