reality and virtual reality
The bulk of money made in salmon farm production is made by harvesting wild fish, only small amounts are made by selling farmed salmon. Highly unlikely the industry would continue to exist if the commercial harvest for feed ended. Fishmeal discards and algae are for now pipe dreams.Salmon farming could soon be conducted using cultured algae to provide omega 3's ect. and all fishmeal could come from commercial discards and offal from processing wild fish.
Would it be OK then?
I see technology being utilised/created for the recovery and use of "waste" products from other fisheries, or new forms of feed production, happening long before the challenges of taking fish out the ocean are overcome.