Climate change is a big one. That's the big threat. They can't do anything much in the ocean about that, but for the things they can control, effective fisheries management is much more effective than simply closing areas.
Evidence of meeting #20 for Fisheries and Oceans in the 45th Parliament, 1st session. (The original version is on Parliament’s site, as are the minutes.) The winning word was area.
A recording is available from Parliament.
