Okay.
One of the things that we were really interested in with regard to sea lice is this. A lot of the studies on the impact of sea lice are correlative studies, and we wanted to know what the specific effect of sea lice was on these juvenile, out-migrating pink salmon, which are of concern. What we did was to rear pink salmon, both wild-caught pink salmon and pink salmon leaving the river system, exposing them to different sea lice densities, from one to four lice per fish. We found something interesting. When the juvenile pink salmon were very small, less than about 0.5 grams, they were more sensitive than when they were larger than 0.5 grams. So we adopted a no-effect threshold, where we started to see effects of even one louse on the swimming performance of a juvenile pink salmon of less than 0.5 grams. But in our studies where we had fish exposed for up to a month, with one to four sea lice, we only experienced about 6% mortality. Mortality was not nearly as high as we expected, and once fish were greater than about 0.5 grams or 0.7 grams and started to develop scales, they seemed to be much more able to defend themselves against sea lice.
There is a lot of work that needs to be done to get at that exact question of how much of an impact sea lice have on the juvenile pink salmon, because we did different studies that found very different things. And the more studies that are done, the greater the body of evidence we can put together to really make an informed decision on what the impacts are.