I think we need to make a distinction between enforcement and monitoring.
By monitoring, I'm referring to actually monitoring the ecosystems that are present in the MPAs to make sure that we are achieving our conservation objectives. This can involve doing surveys of the abundance of organisms and their general health.
The enforcement part is something else, where we actually have to manage territorial intrusions into the protected area or manage activities that are not allowed within certain zones. I can't really comment on the enforcement part of this.
What I'm trying to make a point about here is the importance of monitoring the ecosystem itself. If something goes wrong, or if we see that things are going in a direction that we don't wish them to, then we need to look at whether this is a result of natural change that we don't understand at all or a result of uncontrolled human intervention.
If I may, I'll make a second point about the critical importance of monitoring to establish a baseline so that we can understand how quickly things can change naturally within a marine protected area. Before we come along a couple of years later and say that “the area wasn't like this two years ago, so who's to blame?”, we really need to get a grasp of the range of natural change in these MPAs and within these ecosystems, and what is outside of what we would normally expect from natural change. We don't really have that baseline in many of these cases.
Closer to the coast, I think we can make use of traditional knowledge for that, but as we move offshore, where we know very little, there we have to use other, more sophisticated tools, mainly technology.