By replacing the fish oil in our salmon’s diet with omega-3 derived from yeast, we’ve been able to reduce our need for feeder fish significantly. Typically it takes 4 or more pounds of feeder fish to raise one pound of salmon—what’s known as the “fish in, fish out” ratio. We’ve dropped the “fish in” number from 4 down to 1, which means we’re conserving 75% of the feeder fish other farms need to raise their salmon.
Our salmon still get their protein from fishmeal, and their omega-3 content comes from a more renewable source. With this one significant innovation, we’ve dramatically reduced our dependence on feeder fish while maintaining the salmon’s optimal health.
- The State of World Fisheries and Aquaculture 2008, Part 3: Highlights of Special Studies.