Stocking density

• The number of fish to stock depends on two main factors:

 The storage capacity of the pond

 The size of the fish we expect when harvesting

• The carrying capacity of a pond is the point at which fish grow slowly or not and is the volume at which the pond can hold fish for culturing (CAST project technical document).

• Example: Culturing in a pond with an area of 1400 cubic meters, the holding capacity of the pond is 3500 kilograms or 2.5 kilograms per cubic meter.

• The size of the fish we expect when harvested is 0.7 kg/head.

• Set a mortality rate of 10%, equivalent to 500 fish, so to compensate for the loss rate, the total number of fish to be cultured is 5,500.

• Farmers can increase the holding capacity of ponds beyond 2.5 kilograms per square meter to 3 or 3.5 kilograms per square meter by changing management measures on feed, water quality, and fish species better than in the previous stage.

 Feed: Ensure that the quality and quantity of feed is provided in sufficient quantity.

 Water quality: Improve water quality through regular water changes.

 Fish Breeds: Change to the fingerling that are resistant to disease and poor water quality.