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Two different species of catfish, Twig (Rineloricaria lanceolate) and Bristlenose (Ancistrus

temminckii), eat algae. Both species take in 4000 J of energy from eating algae. Both excrete 2500 J
of feces, but Twig catfish live in a high current area where they need to expend more energy because
they are swimming. Therefore, it takes this catfish 1250 J of energy for respiration, and they only can
add 250 J towards growth. Bristlenose catfish live in a calm lake where they do not swim as much
and can use more of their food towards growth, specifically 350 J. What is the production efficiency
of each fish?

User Idik
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1 Answer

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Twig catfish is 6.25%

Bristlenose catfish is 8.75%.

User Jason Rebelo Neves
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