In a study on 8 earthen ponds as a try to reduce feeding costs in fish production under semi-intensive system by integration with duck production. One-day Peking ducklings were purchased and reared for 2 weeks in a closed pen before swimming learning. Thereafter, they were divided onto special pens on the banks of 6 ponds only at 80, 40, and 20 duck/pond No. 1-2, 3-4, and 5-6, respectively. Pond No. 7 was offered artificial feed only for its fish, whereas pond No. 8 was manured only by fish duck droppings. Ducks were fed twice daily in their pens and spent most of day hours on the fish ponds. Ducks were bought at 2 Kg average weight (ca. 2.5 month old). The obtained results revealed the superiority of the integrated ducks on most of the fish ponds, concerning final weight, weight gain, dressing weight, boneless meat weight than the control (non integrated) ducks. Protein content decreased but fat content increased in thigh, breast, and livers of ducks on ponds No. 3 to 6 than the control and ducks on ponds No. 1 and 2. The return reduced by decreasing the stocking rate of ducks on the ponds; therefore, the total return from fish and ducks reduced too by decreasing  stocking rate of the ducks. The first 2 treatments (250 duck / feddan) were the best concerning total return from an integrated farm, with lowest working rate and highest % for return / outputs and % of outputs / inputs (except the manure treatment, without ducks).