You guys make it tough, because you put a five-minute limitation on everything. You just threw out a motherhood statement of a question.
From what we've seen so far in the ocean, it's very hard to tease out the big controlling factor. There are obviously some bottom-up effects and some top-down effects. These are the largest seal populations in eastern Canada that we've seen in 50 to 100 years; for grey seals it's probably 200 years. These large predators are here.
A lot of the other fish predators are missing, and these are important. Shark populations are down, but we don't have good numbers, and they are seal predators. There are interactions.