Pert a into those which totally or partially rely on naturally occurring food organisms in ponds. Occasionally, this type may require
Addition of small amount of feeds and fertilizers to stimulate the food chain. Its yield normally ranges from100-300kg/ha/ yr. for the extensive and
600-1,800kg/ha/yr. for the semi-intensive. Intensive farms, on the other hand, depend solely on commercial diets for most of their nutrient equire Ment sand production yield normally exceeds 6,000kg/ha/yr.(Table4).