This article was written by Michael Hugall for CBC News
Researchers aim to limit the amount of mercury in the ecosystem in the Northwest Territories by removing contaminated fish from lakes, leaving young, healthy fish to grow mercury-free.
The University of Waterloo, Environment Canada and the Dehcho First Nations are leading this work, dubbing Sanguez Lake, near Jean Marie River, N.W.T. as the test site for the project.
Heidi Swanson, the lead researcher and assistant professor at the University of Waterloo, said older fish usually have a higher concentration of mercury and isolating them could help lower the overall mercury levels in the ecosystem.