Extensive fish farming system

• Is the least-managed form of fish farming in which little care is taken about its improvement.
• Large ponds measuring 1 to 5 hectares in area with stocking density limited to only less than 7000 fish/ha.
• No supplemental feeding or fertilization.
• Yield is poor ( 1-2 tons/ha/year).
• Survival is low with low investment cost and income.

Advantages

• Less investment is required.
• Less labor is required.
• Low risk of oxygen depletion
• Low chances of disease and parasite outbreak.

Disadvantages

• Low production
• Less control over the size of fish
• Large water surface area required
• Risk of predation
• Difficult to control weeds and diseases
• Difficult to harvest