I like the analogy that I own my backyard but the city has caveats on how big the fence can be. I think the province and Canada have a similar arrangement in terms of the property being the province's and Canada having that overarching responsibility for fisheries sustainability.
The reality is that whatever Canada wants to happen nationally has to happen on provincial crown land in this regard. I also like the saying that you should get on the horse the way it's facing. Use those provincial crown land processes, integrate, and use their experience and knowledge and their delegated responsibility to administer the Fisheries Act.