Posted by **Aidan** on Thursday, September 20, 2012 at 4:54pm.

Assume that the fish have an average mass of 280g. The average caloric value is 8kcal/g. The heron

is able to digest 60% of the fishesâ€™ mass. How many will it need to eat to sustain its caloric intake of

3,000kcal/day?

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