The fate of North America's most valuable freshwater system rests in the hands of dedicated scientists working across political boundaries. Greg McClinchey from the Great Lakes Fishery Commission returns to Under the Canopy to reveal the fascinating story of how this binational organization has battled invasive sea lamprey for nearly 70 years while coordinating fisheries management across multiple jurisdictions.

Greg reveals the remarkable impact these parasitic invaders have had on Great Lakes ecosystems. Each sea lamprey consumes approximately 40 pounds of fish during its lifetime, while females produce around 100,000 eggs. Left unchecked for just 3-5 years, these invaders would collapse fish stocks throughout the basin. Through dedicated control efforts using targeted lampricides in tributary streams, the Commission has reduced lamprey populations by about 90% from their peak.

The conversation takes unexpected turns, including the surprising story of how lamprey from the Great Lakes became part of a royal pie for Queen Elizabeth II's Golden Jubilee when lamprey couldn't be harvested from their native English waters due to conservation concerns. While European lamprey are considered delicacies, Greg explains why Great Lakes lamprey are unsafe for human consumption due to accumulated heavy metals.

We explore cutting-edge science initiatives like the Great Lakes Acoustic Telemetry Observation System (GLATOS), which tracks fish movements throughout the lakes, and the potential for mass-marking hatchery fish. Most impressively, Greg shares news that lake trout populations in Lake Superior have been fully restored – a landmark conservation achievement after decades of work.

What stands out most is how this international organization maintains unanimous, science-based decision-making even during periods of political tension between the U.S. and Canada. The Great Lakes Fishery Commission stands as a model for how shared commitment to natural resources can transcend politics to achieve remarkable conservation outcomes.