In my first outline, I named three agents that are associated with cultured fish. As managers, we're able to deal with the anthropogenic activities that we can control. Obviously one of those is control of cultured fish. We can control how many hatchery fish we release. We can control the health and condition of those releases. We can control where and when farms are occurring and under what regulations.
There's also good evidence that both the freshwater environment and the pathogens that are coming out in salmon from fresh water can be important pathogens in the marine environment. There is mounting evidence in our program that areas of the coast that have more industrial activities may be where salmon are undergoing the highest levels of infection.
I think we need to be focusing not only on what we can control anthropogenically but also on identifying the critical areas along the coast where salmon are most infected and most stressed, and then on remediating the stresses in those habitats.