It’s a big concern,” said Kevin DuPuis, Fond du Lac tribal council chairman. “It’s something we talk about at nearly every (tribal government) meeting.” Biologists from both the Fond du Lac Band and …It’s a big concern,” said Kevin DuPuis, Fond du Lac tribal council chairman. “It’s something we talk about at nearly every (tribal government) meeting.” Biologists from both the Fond du Lac Band and …