Navigation Links
Ice Age extinction claimed highly carnivorous Alaskan wolves

kan habitat was probably recolonized by wolves that survived south of the ice sheet in the continental United States, Leonard said.

The ancient Alaskan wolves differed from modern wolves not only in their genes, but also in their skulls and teeth, which were robust and more adapted for forceful bites and shearing flesh than are those of modern wolves. They also showed a higher incidence of broken teeth than living wolves.

“Taken together, these features suggest a wolf specialized for killing and consuming relatively large prey, and also possibly habitual scavenging,” Leonard said.

Chemical analyses of the bones back up this conclusion. Carbon and nitrogen isotope values of the Alaskan wolf bones are intermediate between those of potential prey species—mammoth, bison, musk ox and caribou—suggesting that their diet was a mix of these large species.

The cause of Pleistocene extinction (called the “megafaunal” extinction because of the large size of many of its victims) is controversial. It has been variously blamed on human hunting or climate change, or on a combination of factors as the Ice Age waned.

For the specialized Alaskan wolves, the story is perhaps less complicated. “When their prey disappeared, these wolves did as well,” Leonard said. But the results of this study also imply that the effects of the extinction were broader than previously thought. “There may be other extinctions of unique Pleistocene forms yet to be discovered,” she added.
'"/>

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:8/29/2014)... Davis have made some surprising discoveries about the ... immunodeficiency virus (SIV), the team found that specialized ... early responders to viral invasion and are the ... called interleukin-1 beta (IL-1β). , Though aimed ... of the gut epithelium that provides a barrier ...
(Date:8/29/2014)... (Aug. 29, 2014) Scientists at the Barshop Institute ... of Medicine at the UT Health Science Center at ... the tissues of the longest-lived rodent, the naked mole ... the cells of naked mole rats protects and alters ... damaged and obsolete proteins. , The factor also protects ...
(Date:8/29/2014)... about what genetic changes transform wild animals into domesticated ... is a University of Montana assistant professor, has made ... of the brain and the nervous system were particularly ... 28 in Science and gives answers to ... ., The domestication of animals and plants, a prerequisite ...
Breaking Biology News(10 mins):The early cost of HIV 2Factor in naked mole rat's cells enhances protein integrity 2New research reveals how wild rabbits were genetically transformed into tame rabbits 2New research reveals how wild rabbits were genetically transformed into tame rabbits 3
... NY, September 4, 2012The use of RNA in nanotechnology ... development of new therapeutic compounds. Key technical challenges remain, ... use of RNA molecules in nanotechnology approaches are presented ... , a peer-reviewed journal from Mary Ann Liebert, ...
... appliances in Spain are processed out of the Integrated ... of Salamanca exposes how many manufacturers are not registered ... According to the European directive on waste electrical ... the waste they generate during their activity until reaching ...
... fungal species, called , Hebelomagriseopruinatum , has now officially ... whose name can be translated into ,the grey-dewy tear ... mushroom-hunting tour headed by postdoc Jacob Heilman-Clausen from the ... 2009, postdoc Jacob Heilman-Clausen from the Center for Macroecology, ...
Cached Biology News:More than 70% of electronic waste management is uncontrolled 2More than 70% of electronic waste management is uncontrolled 3New Danish fungal species discovered 2
(Date:8/29/2014)... SAN DIEGO, Aug. 29, 2014  Pfenex Inc. ... in the development of high-value and difficult to ... business update and reported financial results for the ... "With the successful completion of our initial public ... advance our biosimilar product candidates, derived from our ...
(Date:8/29/2014)... but one of the most promising technologies for future ... light (photons) instead of electrons. First, it is necessary ... photons and control their direction. Researchers around the world ... control, but now scientists at the Niels Bohr Institute ... emitted one at a time and in a particular ...
(Date:8/29/2014)... York (PRWEB) August 29, 2014 ... at $5.6 billion in 2019. It is expected ... 2013 to 2019, and was valued at $1.8 ... published by Transparency Market Research. , For more ... http://www.transparencymarketresearch.com/companion-diagnostics-market.html . , The research report, titled ...
(Date:8/29/2014)... York (PRWEB) August 29, 2014 According to ... Orthobiologics Market” the global orthobiologics market was valued at USD ... market worth USD 5,519.9million in 2019at a CAGR of 5.9% ... aged 50 years and above is afflicted by bone and ... by the year 2020. This has and will continue to ...
Breaking Biology Technology:Pfenex Reports Second Quarter 2014 Results and Provides Business Update 2Pfenex Reports Second Quarter 2014 Results and Provides Business Update 3Pfenex Reports Second Quarter 2014 Results and Provides Business Update 4Pfenex Reports Second Quarter 2014 Results and Provides Business Update 5Pfenex Reports Second Quarter 2014 Results and Provides Business Update 6Pfenex Reports Second Quarter 2014 Results and Provides Business Update 7Pfenex Reports Second Quarter 2014 Results and Provides Business Update 8Breakthrough in light sources for new quantum technology 2Companion Diagnostics Market to Hit $5.6 Billion in 2019: Transparency Market Research 2Companion Diagnostics Market to Hit $5.6 Billion in 2019: Transparency Market Research 3Global Orthobiologics Market to Reach $5,519.9 Million by 2019: Transparency Market Research 2Global Orthobiologics Market to Reach $5,519.9 Million by 2019: Transparency Market Research 3
... China, Jan. 31 /Xinhua-PRNewswire/ -- WuXi PharmaTech ... acquisition of AppTec Laboratory,Services, Inc., a US-based ... industries. AppTec offers testing, contract research and,development, ... highly,differentiated, fully integrated platform., (Logo: ...
... Pharmaceuticals,Inc. (Nasdaq: AMLN ) will be presenting at ... in New York on,Wednesday, February 6, 2008 at 1:00 ... Vice President, Finance and Chief Financial Officer of,Amylin Pharmaceuticals, ... presentation and breakout session will be webcast, and a,recording ...
... International,Inc. (Nasdaq: CHDX ) a leading independent ... the People,s Republic of China,announced that it intends ... ended December 31, 2007, on Friday, February 8, ... conference call on Friday,February 8, 2008 at 10:00 ...
Cached Biology Technology:WuXi PharmaTech Completes Acquisition of AppTec 2Chindex International Announces Conference Call to Discuss Its Fiscal 2008 Third Quarter Results on Friday, February 8, 2008 2Chindex International Announces Conference Call to Discuss Its Fiscal 2008 Third Quarter Results on Friday, February 8, 2008 3
Request Info...
...
Request Info...
Agarose-LE, 500 g. Suitable for soft agarose cloning. Nuclease-free.Gel point (1.5%): 36 1.5 C, EEO (-mr): 1200 g/cm2. Category: Nucleotides & Enzymes & Biochemicals, Ultrapure Biochemicals ....
Biology Products: