The IUCN guidance is global, so it needs to be interpreted in a northern developed country. In many cases in the world, the fisheries are local. They just provide for local needs, and that could be the case in Canada. It's all about scale, really. All of these impacts are about scale. If it has a very large scale, it becomes commercial.
We're not talking about commercial fishery, but neither in the IUCN world are we too concerned if somebody is selling a few fish to a neighbouring village.