Culture of the giant freshwater prawn [Macrobrachium rosenbergii de Man] in three different systems
1981
Piamsak Menasveta | Somkiate Piyatiratitivokul
Culture of the giant freshwater prawn in three different systems were comparatively studied. These culture systems are: 1) a large earthen pond; 2) nylon cages submerged in an irrigation canal; and 3) a longitudinal ditch located in an orchard. Each culture system was initially stocked with juvenile prawns at 5 prawns/m2. The prawns were fed with a compound diet at the same ratio for the experimental period of six months. The results showed a significant difference on growth among these three systems. The prawns reared in cages exhibited the poorest growth while those of the other two systems exhibited better and comparable growth. Nevertheless, the prawn reared in cages showed the best survival (52.5%). Survival of prawn reared in the earthen pond and the longitudinal ditch were 48.0% and 35.2%, respectively. The yield per rai (0.16 ha) per crop (six months) of these three systems were 210 kg, 138 kg, and 74 kg, respectively. The factors affecting growth, survival, and production of the prawn are discussed.
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