Nitrogen and phosphorus budgets of a polyculture system containing <i>Penaeus vannamei</i> , <i>Siganus guttatus</i> , and <i>Selenotoca multifasciata</i>

The study was designed and conducted to optimize the structure of polyculture for Penaeus vannamei, Siganus guttatus (omnivorous fish), Selenotoca multifasciata (carnivorous compare changes in yield, survival, utilization rates nitrogen (N) phosphorus (P). Five treatments were performed as follows: Control (C) (0.0719 kg/m3, 0, 0), PSS1(0.0719 0.0018 0.0008 kg/m3), PSS2 0.0033 0.0016 PSS3 0.0047 0.0023 PSS4 0.0064 0.0031 kg/m3) (with P:Penaeus S:Siganus guttatus, S: multifasciata). yield survival P. vannamei different significantly (P<0.05), with highest yields being (718.75 kg/hm3), S. (32.97 (15.63 kg/hm3) treatment PSS2. 89.4 ± 1.6% PSS2, while N P 27.7% 37.5% PSS3. mode when using a suitable density can improve production well