From the Park's Facebook page today:

We are monitoring fisheries in some of Quetico’s lakes this season in order to better manage our aquatic ecosystems.
When you check in at an entry station, our rangers will have the most up-to-date information and will inform you if your trip may encounter a research crew. Estimated research dates and locations will also be posted at all six of our stations.
For more information on the broad-scale monitoring program in Quetico please see our 2024 park tabloid.
More generalized information about the program is also available at   (You need to Login or Register