Coastal Aquaculture and Mariculture (2+1)

5.1.7. Supplementary feeding and Harvesting

Unit 5 - Finfish culture systems

5.1.7. Supplementary feeding

• The fish fed are a mixture of rice bran and oil cakes at the rate of 2-3% of the body weight.
• Feeding should be avoided on over cast days and when oxygen levels fall below 2 ppm.

Harvesting

• Over wintered fry of 100 to 150 g reach marketable size of 300 to 450 g in eight weeks.
• New fry reach market size in 5 months.
• After 2 months of stocking fish can be partially harvested by dragging gill nets.
• Final harvest is carried out when all the fry reach marketable size.
• A production of 2000-5000 ka/ha/year can be expected from semi-intensive culture of milkfish.