As I said, the farmers have changed their operations to recognize the out-migration periods of the wild salmon. There is early harvest, before the out-migration. There's the addition of therapeutants to the feed at the right time so that the lice don't exist on the fish in as great numbers as they used to. That has helped.
There's a heightened awareness of the wild fish that wasn't there 10 years ago. It's improving. But on the overall impact, I can't tell you whether that has resulted in a 50% decline in the mortality of wild smolts over that period of time or whether it's been 25%. It certainly isn't a full answer; it's not like closed containment, where there is no interaction, but it will be some factor lower than it was five years ago.
To me, the open net cages are just a ticking time bomb. Eventually, if it hasn't already happened, you're going to have a pathogen outbreak in those farms just because of the density in the farms and because of the number of farms involved.
I think the farmers do their best. Obviously, they want to keep their crop alive. They want to get it to grow to market size so that they can sell it. They use antibiotics in their feed to try to control the pathogens. They use SLICE to try to control their lice infestations. They've made a lot of those moves. But the research shows that the pathogens are mutating more quickly than they can catch them. It is very similar to what's happening in the human population.
If you leave the status quo in place--and I can't tell you whether it will be next week or 10 years from now--there will eventually be a major problem that we as humans will not be able to control.