Our approach to MPA establishment is to take it site by site. We identify our conservation objectives and we understand the human uses, and we prohibit those human uses that are posing a risk to the conservation objectives. In some cases there will be impacts to fishers. They may have to be displaced to the area outside or may not be allowed to continue to fish because that particular activity is posing a risk.
I wouldn't say there are no impacts to fishers as a result of MPA establishment.