So the prediction is a total collapse of our ocean fisheries by 2050?
Yet many are arguing for no MPA's, so we don't need them until all the fish are gone?
If you look at history some of the same arguments now being used against the idea of marine reserves, was also used by those opposed to taking millions of acers of federal land and designating it wilderness areas.
At the time those lands were set aside there wasn't any biological reason to do so.