If we are talking survival, the sky's the limit. You could use nets, fish traps, poison(rotenone kills fish,but not those eating them), hand grenades, or even, a hand crank telephone with wires in the water, or similar electrical source. Fish and Game rules do not apply.

But there are a lot of plants and immobile critters that are easy pickin's. Around here, abalone are immobile and very delicious. Does Alberta support abalone?