Certainly there is some tourism built around the mackerel and cod stocks, depending on the season, but that's what a lot of the seasonal charters do in a number of the harbours.
The tuna charters are more of a specialty. They will do those other species also, but a number of the organizations focus only on the tuna. But they can do both.
The structural costs in terms of what a day costs are quite a bit higher for tuna, which is mainly related to going out longer distances and more time being spent on the boat. However, they are both contributing industries to the P.E.I. economy.