According to The Globe and Mail, researchers tested the whales' main food supply, chinook salmon, and found pollutants that are jeopardizing the large orcas that eat them.
Peter Ross of the federal Institute of Ocean Sciences in Sidney said previous research has shown that the whales have dangerously high levels of pollutants.
Killer Whales Poisoned by PCB Tainted Fish
US - A new study has found that resident killer whales off the western coasts of Canada and the United States are being poisoned by eating salmon laced with toxic PCBs.
