EVERYDAY SCIENCE

Detailed explanation-1: -Freshwater prawns are among the best species for culture because they can be grown in both fresh and low-salinity waters. They are omnivorous and hardy, and have the maximum growth potential among the cultured prawns.

Detailed explanation-2: -The giant freshwater prawn is suitable for cultivation in tropical and subtropical climates. The most commonly cultured species in India is Macrobrachium rosenbergii.

Detailed explanation-3: -The breeding takes place in low saline waters which is also needed for larval and post larval development after incubation. Breeding of M. rosenbergii takes place in estuaries.

Detailed explanation-4: -Fresh Water Prawn (Macrobrachium malcolmsonii), the second largest fast-growing prawn occurs commonly in Indian rivers, draining into Bay of Bengal. They are cultivated under monoculture as well as polyculture systems. Under monoculture systems production levels of 750-1, 500 kg prawns/ha/ 8 months are achieved.

Detailed explanation-5: -Among the given options, Macrobrachium rosenbergii is the only fresh-water prawn.