I don't think the first nations fishermen can sell them, can they? They're supposed to be caught for personal/familial consumption only hence why they have such high limits.
You're right, the regular First Nations fisheries usually allow them to catch a huge number of fish for food and cultural purposes (it is their constitutional right, in fact).
However, there are different types of fisheries. If things are going well in terms of the fishery, First Nations are often granted "economic opportunity" fishery licenses that allow them to catch and sell.
Edited by jonny, 19 August 2014 - 11:14 AM.