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Tag: "elk" at biology news

Fibril Shape Is The Basis Of Prion Strains And Cross-species Prion Infection

...etween previously separate animals like humans and elk and deer, which suffer from a prion disease called chronic wasting disease. Surewicz stresses, however, prion infection between species is still rare. "Fortunately, transmission by eating is very ineffective. There have been hundreds of thousands of...

Gray wolves maintain the food chain in winter

... grizzly bears, wolves abandon their prey (usually elk or moose) once sated, leaving much-coveted leftovers for ravens, eagles, coyotes, bears, and other scavengers. Altogether, their modeling studies show that shorter winters without wolves will create intermittent food supplies that no longer track the...

Ocean climate predicts elk population in Canadian Rockies

... from the north Pacific Ocean and tell you how the elk are doing in Banff National Park. The University o...climate is more complex. Hebblewhite analyzed the elk population in Banff National Park from 1985 to 2000 and cross-referenced his results with NPO values...

Expanding forests darken the outlook for butterflies, study shows

... the meadow areas, which animals such as sheep and elk like to inhabit. The offshoot is that it also helps smaller animals, such as the butterflies," Roland said. ...

Proposal would allow wild animals to roam North America

... shifted. The loss of wolves and grizzlies allowed elk populations to soar. Elk, in turn, ate willows, a ...avorite food of beavers. As a result, along winter elk ranges in Colorado, beaver populations have declined by 80 to 90 percent. With fewer beavers to crea...

Wolves' top-down effect

..., Alberta, Canada. But once wolves left this area, elk grew more plentiful, browsing heavily on young wil...gues found that in the low-wolf area of Bow Valley elk populations were 10 times as high as in the high-wolf area. "We also found that as elk populations ...

Students discover 11,000 year old remains of Irish Elk

...ed, the position of the remains indicates that the elk (Megaloceros giganteus) lived around 11,000 years ...retreated northwards. The students who found the elk were taking part in a field trip examining the Manx landscape. Dr Peter Davey, Director of the Centr...

UGA researchers find that hunting can increase the severity of wildlife disease epidemics

...pean foxes and chronic wasting disease in deer and elk populations in the American West. The researchers note that in each instance, disease outbreaks have worsened in response to the hunting. One reason the policies failed, Choisy and Rohani said, is that they didn't take into account an ecological pr...

Cougar predation key to ecosystem health

...n sizes of native grazing animals such as deer and elk ?they also have indirect effects in changing their...his ?the way cougars affect deer and wolves affect elk ?continue to mount, land managers may have to acknowledge the potentially enormous impact of these g...

Over a century after disappearing, wild elk return to Ontario

...ario due to over hunting in the 19th century, wild elk have returned to the province thanks to the efforts of the Ontario elk restoration program. According to a report on the program’s success, published in the March issue of...

Vaccine prevents prion disease in mice

...nt outbreak of chronic wasting disease in deer and elk occurs and if it were transmissible to humans, then we would need a vaccine like this to protect people in hunting areas." He also noted that a vaccine that decreases the spread of prion disease in animals also reduces the possibility that the di...

Prey not hard-wired to fear predators

Are Asian elk hard-wired to fear the Siberian tigers who stalk t...y caused a cascade of events including a change in elk distribution, more wariness in moose, and a change in coyote densities. By contrast , where wolves ...

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