Yes. I will submit what I consider to be the key papers on this.
The interesting thing is that when you start extracting a lot of fish biomass out of an ecosystem, you change the ecosystem rather fundamentally because you change the trophic structure of the ecosystem. You often take the large predators out of the system first. We all know from land examples that when you take large predators out of the system, the system is different. Having an area unfished as a reference benchmark system is kind of fundamental.
Our recent study in Nature showed that we get strong benefits, even in lightly fished areas—though not as large as in an unfished area but significant—and we saw that throughout.
That would disagree with Edgar et al., who said that you have to have all five—and I don't think Edgar said that you have to have all five. You get better results when you have all five of those factors, but simply reducing the pressure on an area gives you significant benefits. There is no question about that.
The benefits aren't merely that you're catching fewer fish. The benefits are broader in the ecological sense.