Dynamics and Composition of Plankton in Superintensif Shrimp Ponds Litopenaeus vannamei

The problem with superintensive vannamei shrimp cultivation is the increase in N and P concentrations which can cause eutrophication and blooming algae. Therefore, this research aims to obtain data and information regarding plankton dynamics and water quality in super intensive vannamei shrimp cultivation at different densities. The research used 3 pond plots with a shrimp density of 750 individuals/m2 (A); 1,000 heads/m2 ; and 1,250 heads/m2 . Plankton data was collected through observation by filtering pond water at five points using planktonnet no. 25, 20 liters at 5 sampling points or 100 liters of water per plot, and sampling was carried out every 7 days. The results of statistical analysis show spearman correlation analysis showed that shrimp density did not have a significant effect on plankton abundance, phytoplankton abundance, zooplankton abundance, TAN, NO2 , NO3 , PO4 , and TSS because the sig value. 2-tailed P > 0.05. however, the abundance of phytoplankton had a significant influence on the abundance of zooplankton (P < 0.05). while zooplankton abundance was influenced by NO2 (P < 0.05). The close relationship between shrimp density and the abundance of plankton, phytoplankton, zooplankton, and water quality (TAN, NO2 , NO3 , PO4 , and TSS) is very low (-0.85–2.79). positive and very close correlation between plankton density, phytoplankton density and zooplankton density (0.68–0.956), and negative correlation with water quality (TAN, NO2 , NO3 , PO4 , and TSS). This causes the distribution of low levels of diversity (H) and evenness (E), so that the average dominance index is below 1, which indicates the absence of dominant individuals. Therefore, in the three treatments no dangerous plankton blooming was found.