Ryan Kokokopenace and other residents of Grassy Narrows First Nation rely on fish from the Wabigoon River system, where provincial data reveals mercury levels far above recommended daily limits. ( Todd Korol / Toronto Star file photo )For the residents of Grassy Narrows who have fished Clay Lake and the river downstream for generations, walleye is a dietary staple. Kokokopenace and his family fish for walleye in the Wabigoon River, which is connected to Clay Lake. Current advisories issued by the province generally say walleye from Clay Lake should not be eaten. The Star asked Swanson, who specializes in mercury levels in fish, to analyze the data set.

Source: thestar November 23, 2016 10:00 UTC