I personally would score the salmon on the test with a higher percentage than you have given them. Salmon eggs are very durable, have you ever tried to squish one in your finger? They are a lot harder to break than it seems. As long as you keep clean tanks, lots of oxygen, and cold water, salmon seem pretty content to live in raceways. I would bump up the scores on these two, to probably a 5 and 4, changing the percentage to at least a 72% on the test.