Having worked on these related issues for a long time, 20 years or so, the improvement is noticeable. There have been great strides. We still face the same issues, and we've reduced the number of escapes, but we have also produced many more salmon in net pens. The levels of escapes in total numbers probably remains fairly stable, though the percentage from an escapement is lower.
There are improvements in technology that can be made, standards that can be introduced, and moorings and collapse of cages that can be addressed. There are pesticide treatments whereby you close-contain the net pen when you're applying the pesticides, so that it doesn't escape into the environment, or it reduces the amount that escapes into the environment and reduces the amount you need to put into the environment in order to control things like sea lice.
There are all these incremental steps that are improving it.
As long as we have open-net pen culture, we're going to have escapes and we're going to have disease transmission, because it's an incomplete barrier. We can reduce it, but we can't eliminate it.