Here’s your weekly Science Matters column by David Suzuki with Faisal Moola.
Bearing down on grizzlies
Years ago, I was surprised to learn that a grizzly bear is protected in
the United States, but if it walks across the border into British
Columbia, it can be killed for sport. So we did a program on them for
The Nature of Things. I was amazed to see pictures from the 1800s of
immense piles of skulls from grizzlies that were slaughtered to make
room for early settlers on the prairies. Grizzlies were not just
mountain animals; they flourished on bison all the way across Canada to
Manitoba and south to Texas and California (where the only place you’ll
find one now is on the state flag)! Grizzlies need space – tagged
animals have been known to travel over hundreds of kilometres in a
season. But the cumulative impacts of habitat loss and fragmentation
from logging, mining, road building, urbanization, and other land-use
pressures have forced them into isolated patches of territory.
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