Answer: Mrigal.
- A Catla
- B Silver carp
- C Rohu
- D Mrigal
Correct answer: D. Mrigal
Explanation: Mrigal is a bottom feeder and occupies the bottom zone in composite fish culture systems.
Different fish species occupy different feeding depths in the same pond without competing for food: Catla feeds near the surface, Rohu in the middle zone, and Mrigal or common carp at the bottom - letting a single pond support far more total fish than one species alone.
Concept context
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