Effect of pond fertilization on growth performance of pirarucu (Arapaima gigas) during grow-out phase

Fertilization of aquaculture ponds has been pointed out as an efficient practice to improve fish feed conversion and growth performance. In this way, the present study aimed assess effect pond fertilization on performance, body composition, water quality juvenile pirarucu Arapaima gigas reared in earthen (600 m²) during grow-out phase. Two fertilized two non-fertilized were stocked with 208 pirarucus (19.9 ± 3.6 g 15.0 0.9 cm) for 100 days. All four limed before study. Ponds weekly until end experiment, offered apparent satiation. Pirarucu presented higher final weight (20%) biomass (19%), further lower intake rate (1.31) than (1.61). Pond did not affect coefficient variation, which was reduced over culture cycle. The composition content, protein, energy retention rates lowered crude fat energy. Fertilized transparency levels pH from 50th day culture, whereas ammonia concentration first 25 Therefore, is a recommended