That is a good question.
As far as I know, the oversight for our waterways is rather good. Many of our lakes are part of what we call structured land—part of an outfitter operation, in a controlled development area, or in a Sépaq wildlife preserve—that covers a large part of southern Quebec. This allows us to conduct relatively precise oversight on anglers. These establishments often have fishery guardians, wildlife protection officers who are in the field, or wildlife protection assistants that help them monitor what anglers do. The fact that many lakes are part of this structured land allows us to monitor what anglers do.
In the far north of Quebec, the land is open to use by all but is often inaccessible due to the distance that must be travelled to reach it. We are not aware of any current problems in the lakes in northern Quebec.