I couldn't agree more with your caution that we shouldn't mistake correlation with cause and effect. What we've heard from many of our witnesses, from what we loosely call environmental activist groups, was their immediate and positive assertion of the negative effects of aquaculture, as if the question had been completely settled and now it's time to move on and deal with it. So your caution as a scientist is greatly appreciated.
As for your research on food sources for aquaculture, I see you've done some work on replacing fish oil with canola oil for growth. What percentage of the feed can be canola oil, or some other plant-derived protein?