There is always a decrease when it comes to wild Atlantic salmon. There are examples where fish biomass increases, and certainly in the St. John River, one of the great salmon rivers of the world just 30 or 40 years ago, the salmon are virtually gone. There is a huge enhancement program, a hatchery on the St. John that DFO operates, and we still have very poor returns of Atlantic salmon, despite a multi-million dollar hatchery program.
We now have all kinds of pickerel, pike, and smallmouth bass. That's great if you're a smallmouth bass fisherman. The problem is that nature did not intend the smallmouth bass, the pike, and the pickerel to be in the St. John River. That is an Atlantic salmon river and a brook trout river. The wild native species are going down the tube at the expense of a fish obstruction. There is an increase in fish biomass, but not wild native fish.