That's an excellent question. It's a question that is actively researched currently in Canada and internationally. Obviously some species cover a range that is far greater than the size of the protected areas, but that does not mean that you cannot identify specific sites that are important for the life cycle of those species—nursing, spawning, and all that. That's currently the strategy, trying to aim for places that are specifically important for the life cycle of some species, acknowledging that you cannot necessarily cover the entire range of the species.
Evidence of meeting #80 for Fisheries and Oceans in the 42nd Parliament, 1st Session. (The original version is on Parliament’s site, as are the minutes.) The winning word was mpas.
A recording is available from Parliament.