I can tell you the striped bass have been in that river for a long time. In 1874 there was a winter fishery of striped bass on the Miramichi, just for your information.
However, the other thing I would suggest is that striped bass, like the salmon, need a sustainable number. I don't think they need 300,000 in order to survive. I wouldn't be averse to removing some of those fish out of there, but I certainly wouldn't be interested in eradicating them, because they have an important part to play in the ecosystem as well. I think there should be some scientific parameters set around to make sure that it was done properly.