... but wouldn't the conversion rate be better for smaller fish that are gaining weight faster than larger fish?
Very good question - I don't know. I have never seen that addressed. If the small fish are eating more to sustain that faster rate of growth then maybe the same conversion rate. But the data I have seen is either as a % of body weight or to satiation. You could get opposite results just based on that. There is very little data on larger fish in a controlled environment. That is why we want the data from Purina and Cargill.
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