I would not recommend that open-net pen aquaculture be banned on Canada's coasts. I think the report meant to—and tries to—take a balanced perspective of the realized and potential environmental impacts of open-sea net pen aquaculture vis-à-vis the alternatives from a closed containment perspective. So to answer your question, the society report does not advocate a ban on open-sea net pen aquaculture.
On March 12th, 2012. See this statement in context.