Maybe I'll just give an example of the work we did with herring. Why did herring require rebuilding? They were in a really low state. What was the explanation?
We spent three years looking at how we should manage herring, but also at what the cause of the decline was. There was no clear answer or reason why. There are limitations in science, and science was unable to explain the high abundance of herring we saw in the fifties in Haida Gwaii. Also, traditional knowledge talked about a higher abundance back in the thirties and forties, before DFO started keeping records of herring.
Both those things informed what a reasonable policy would be, moving forward, to rebuild herring.