There have been great successes in New Zealand with these types of projects.
Can you explain the NZ references? I'm an expat Kiwi and just got off the phone with my family in Christchurch to ask about this. MPA's are very new to NZ so I think its way to early to suggest any success let alone implementations. There are some marine sanctuaries along the east coast of the South Island but these are very small when compared to what is proposed here.
Attached is the NZ MPA Q&A...
Ministry of Fisheries Internet | Environmental | Habitat Protection and Research | Marine Protected Areas | MPA Questions and Answers