Changes in Zooplankton Community Structure in Industrial Shrimp Farming Ponds

Abstract:

To explore the variations in zooplankton community in the shrimp factory aquaculture process, effectively manage water quality, and improve aquaculture efficiency, the characteristics and succession of zooplankton community structure, as well as the relationship between the community and Vibrio, phytoplankton, and the environment were analyzed. A total of 21 species, belonging to 4 categories were identified from August to November 2018. Protozoan zooplankton species were the most diverse, accounting for 61.9% of the total species, followed by Rotifera (14.3%), Copepoda (14.3%), and Cladocera (5%). The average density and biomass of zooplankton in the experimental pond was about 0.71×103 ind./L and 11.72 mg/L, respectively. The Shannon-Wiener diversity index (H') of the zooplankton fluctuated between 0.52 and 1.64. Correlation analysis showed that the zooplankton density was significantly negatively correlated with the phytoplankton density (P<0.05). Canonical correspondence analysis showed that temperature, pH, nutrients, etc. are important factors influencing the succession of dominant species of zooplankton. The results provide basic data for understanding the zooplankton community structure in the factory aquaculture of Litopenaeus vannamei.