In this research, effect of productive stages in nitrogen and phosphorus excretion in wastewater from hyperintensive tilapia (Oreochromis niloticus) culture was evaluated. Fish were cultivated considering three development stages (fingerling of 1.79 g, juvenile of 36.13 g, and adult of 72.96 g). Nitrite, nitrate, ammonium, and phosphorus concentration were determined in order to know the amount of nutrients excreted per productive stage of the fish at a high stocking density. Biometric data were recorded during the experiment with the purpose of determining the growth behavior of fish, as well as the measurement of the aerobic metabolism. Results showed that survival, growth, and health of fish are not affected by hyperdensity of culture; as well, combined catabolism of proteins and lipids was presented as substrates for energy with value for O:N ratio ranging between 20 and 60. In addition, higher concentration in excretion of nitrogen compounds and phosphorus per gram of fish was recorded in wastewater from a hyperintensive culture in fingerlings than in juveniles and adults. These results suggest the use of this wastewater in the early stages of fish growth, aiming to enhance sustainable systems with maximum use of the resources, such as aquaponics systems.

在本研究中，生产阶段对超集约化罗非鱼 ( Oreochromis niloticus)废水中氮和磷排泄的影响) 文化进行了评估。养殖鱼考虑三个发育阶段（幼鱼 1.79 g，幼鱼 36.13 g，成鱼 72.96 g）。测定亚硝酸盐、硝酸盐、铵和磷的浓度是为了了解在高放养密度下鱼在每个生产阶段排泄的营养物质的量。在实验过程中记录了生物特征数据，目的是确定鱼的生长行为，以及有氧代谢的测量。结果表明，鱼的存活、生长和健康不受高密度养殖的影响；同样，蛋白质和脂质的组合分解代谢被呈现为能量的底物，其 O:N 比值在 20 到 60 之间。此外，在鱼种超集约化养殖的废水中，记录到的每克鱼的氮化合物和磷的排泄浓度高于幼鱼和成鱼。这些结果表明在鱼类生长的早期阶段使用这种废水，旨在通过最大限度地利用资源来增强可持续系统，例如鱼菜共生系统。