Yale Environment 360 highlights a hopeful aquaculture advance. We need farmed fish for the future, so we badly need farming technologies that avoid the severe negatives of most coastal saltwater farming of predator fish (e.g., Atlantic Salmon). I am surprised that they have achieved a 1:1 input/output ratio; typically farms feed 4 to 5 kilos of fish meal to yield one kilo of salmon. And the imprint of the Monterey Bay Aquarium is a big deal — they are very serious about the whole life cycle of the farms:
(…) The salmon are raised in closed pens on land, rather than in open net pens near coastlines, eliminating dangers from the spread of disease to wild fish and ending the problem of farmed salmon escaping and breeding with wild salmon. The AquaSeed salmon also are raised in freshwater, as opposed to saltwater, and the company uses Pacific salmon rather than Atlantic salmon — currently the most common pen-reared form of salmon. In addition, through advances in breeding and changes in feed formulas, AquaSeed says it can raise a pound of salmon using roughly a pound of fish food; traditional salmon farms use about four pounds of fish meal to produce one pound of Atlantic salmon.
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