Thanks. It's a technical question, but it's a very good question, because salmon have one of the most complicated life histories of any fish that we manage. We have to worry about what happens to them in fresh water, we have to worry about what happens to them as they go into the coastal areas, then we have to worry about what happens to them in the ocean and then all the way back again, so you really do need to take that life-cycle approach.
It means we have to recognize what happens in the ocean, which is probably the area we understand the least, quite frankly. We know there's climate change going on and we know there's acidification. That's why we've been looking at sending science missions to understand, with our international partners, what happens there.
Then on the way back, as some have mentioned, there are some complex predation cycles as well, interactions with sea lions and other potential predators like the SRKW themselves, and then we need to understand, as they go up the river, the impact of deforestation, for instance, and land use practices that affect both the river and where they spawn. Things like water temperature in the spawning areas can also be extremely important.
You have to put together all of these factors when you're modelling the salmon in order to understand why we're seeing some of these general trends or where they are going to go.