The last 30 years is an example of what's going on. The graphic I showed of the decreasing salmon population is pretty dramatic. You can put that against...and it's an inverse relationship to what's going on with the population of seals and sea lions on our coast. They're eating them and a whole bunch of other species. They're having a major impact.
I don't think it bodes well for fisheries in the future, if we're not going to manage them somehow.