The Canadian Press
EDMONTON–Newly-published research suggests conflict between humans and grizzlies in the mountains and foothills of southwestern Alberta has been growing for more than a decade.
“We started to see substantial increase in the incidents starting in about 2006,” said Andrea Morehouse, a scientist at the University of Alberta.
“Not only are we seeing these incidents increase in number and frequency, we’re also seeing them occur on increasingly eastern areas of the landscape,” she added.
Morehouse and her colleagues went through more than 6,300 provincial government documents that recorded human contact with grizzlies, black bears, wolves, and cougars from 1999-2014.
That contact ranged from a distant sighting to a dangerous or destructive encounter.
They found little change in the contact with black bears, wolves, and cougars.
But grizzlies recorded a dramatic increase. The number of contacts went from fewer than 50 to about 200–a fourfold increase.
Yet land use in the area has been consistent and the human population is stable or decreasing.
“We eliminate human population increase and changes in demographics as the main reasons behind increasing carnivore conflicts,” the report said.
One reason for the growth could be the elimination of the spring grizzly hunt in 2006. After that date, farmers and ranchers no longer simply could kill a grizzly they believed was harming their operations.
Producers now may be calling in about bears they previously would have dealt with on their own, suggested Morehouse.
As well, people who aren’t used to seeing bears also may be more likely to report them.
“We might expect those people are going to call more frequently as opposed to people who are used to living with bears,” she remarked.
Or there may simply be more bears. Morehouse previously has published research that suggested grizzly populations in the area were increasing at about three percent a year.
The latest study found grain bins–full of tasty carbohydrates–are a major site for bear-human encounters.
“Bears can peel off the doors on those grain bins,” Morehouse said. “It’s like they’re opening a sardine can.”
Some farmers have installed electric fencing around their bins or put bear-proof doors on them.
Bear-proof bins also are available for dead animals that otherwise might attract predators.
Producers also can get reimbursed for the cost of a visit from a rendering truck to deal with carcasses.
Morehouse found that one government program definitely didn’t work. The province used to airlift roadkill carcasses to bear dens in the spring hoping that would keep the hungry bruins in the high country.
Morehouse concluded there was no evidence it did so.
However, most people in the region are keen to keep living with large predators, said Morehouse.
“One of the really exciting things about southwest Alberta is that there is an extremely proactive group of people down here that are working on these issues,” she noted.
They already may be making a difference. Early data from 2015-16 suggests grizzly-human encounters in the area may be down for the first time this century.
“Maybe we’re starting to have a bit of an impact,” Morehouse said.