Question

Why is it beneficial that many predatory fish have larval and juvenile stages that feed at a low trophic level, while the adults feed at a tertiary or quaternary trophic level

Answer 1

By having them feed at different trophic levels they are not competing for the same foods. The foods the adults eat are not the foods the juvenile eats so they are not intruding and competing against each other. That separation in trophic levels assists in the survival of the juveniles to the adult stage.

Answer 2

I had put that as my first answer but she said it was wrong or something. she told me to put the food web energy in it?