BIOLOGY IN HUMAN WELFARE
IMPROVEMENT IN FOOD PRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Catla
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Mrigal
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Rohu
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Silver carp
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Detailed explanation-1: -Rohu feeds in the middle zone of the water body, while Mrigal and Common carp are bottom feeders.
Detailed explanation-2: -A proportion of 30-40% surface feeders (silver carp and Catla), 30-35% mid-water feeders (rohu and grass carp) and 30-40% bottom feeders (common carp and mrigal) are commonly adopted depending on the productivity of the pond.
Detailed explanation-3: -During the fry stage rohu is predominantly a planktivorous surface feeder. From the fingerling stage onwards the feeding habit changes and the fish feed in the water column and on the bottom, mainly on filamentous algae, decomposed vegetation, mud and sand (Chondar, 1999).
Detailed explanation-4: -Solution : Rohu is middle zone feeder, and Mrigal and common carp are bottom feeders.