Yes, no-take zones have been the focus of a lot of attention in the scientific literature in the last 15 or 20 years. There have been a number of papers showing multiple benefits, including, for instance, a significant increase in biomass, so the weight of the fish inside the no-take area is significantly larger than for an area that has partial protection. At some point, those fish can leave the area and then fuel the surrounding waters. That is something called spillover, which has been studied and is taking place in many environments. If you establish stronger protection using no-take, you have more probability, more chances, that your population is going to grow and create a higher biomass. Hence, it is going to be contributing to a healthy ecosystem that will benefit the surrounding waters.
On November 30th, 2017. See this statement in context.