Answer: Catla.
- A Rohu
- B Mrigal
- C Common carp
- D Catla
Correct answer: D. Catla
Explanation: Catla feeds at the surface zone in composite fish culture (polyculture) 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
Learn about animal husbandry, plant breeding, tissue culture, biofortification, and single cell protein.
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