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Grizzly bears, black bears, wolves, coyotes, cougars/ mountain lions,bobcats, wolverines, lynx, foxes, fishers and martens are the suite of carnivores that originally inhabited North America after the Pleistocene extinctions. This site invites research, commentary, point/counterpoint on that suite of native animals (predator and prey) that inhabited The Americas circa 1500-at the initial point of European exploration and subsequent colonization. Landscape ecology, journal accounts of explorers and frontiersmen, genetic evaluations of museum animals, peer reviewed 20th and 21st century research on various aspects of our "Wild America" as well as subjective commentary from expert and layman alike. All of the above being revealed and discussed with the underlying goal of one day seeing our Continent rewilded.....Where big enough swaths of open space exist with connective corridors to other large forest, meadow, mountain, valley, prairie, desert and chaparral wildlands.....Thereby enabling all of our historic fauna, including man, to live in a sustainable and healthy environment. - Blogger Rick

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Tuesday, December 3, 2013

Certain types of foodstuffs reduce stress levels in all living beings on our planet...........For Grizzlies living in the Coastal regions of British Columbia, Canada, it is all about having enough Salmon to eat............If the Salmon runs are aplenty, then the Griz of this region are relatively stress-free..............Researcher Heather Bryan at The U. of Victoria will be evaluating whether less stressed Bears have more and healthier cubs and if they stay clear of the lure of human settlement foodstuffs


Researchers have found a connection between salmon intake, or a lack of salmon intake, and levels of a stress hormone in B.C.'s coastal bears.
Heather Bryan, a researcher with the University of Victoria's Applied Conservation Science Lab, led a study that sampled hair from 70 grizzly bears from B.C.'s Central Coast.
B.C. Central Coast Regional District

Bryan says the study found bears that consume lower amounts of salmon have higher levels of cortisol, which may be a bad thing.

A grizzly bear is seen with a salmon it just caught along the Atnarko river in Tweedsmuir Provincial Park near Bella Coola, B.C., in 2010. Researchers at the University of Victoria say an analysis of hair collected from 70 Central Coast grizzlies shows that those that consumed less salmon had higher levels of the stress hormone cortisol. (Jonathan Hayward/The Canadian Press

"Cortisol is a common stress hormone, for people as well, and it's essential to the everyday survival of bears. It helps them cope with everyday situations and challenges," she said. "But, in the long term, if it's chronically elevated, it has also been associated with negative effects on health and reproduction."
Bryan is about to embark on the second phase of the study, which aims to measure the effects of higher levels of cortisol on bear behaviour and reproductive health.

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