围圈内外水质变化不大 ;浮游植物分别为 48种和 40种 ;浮游动物分别为 2 0种和 19种 ;浮游植物平均密度分别为 7 14× 10 5个 /L和 9 84× 10 5个 /L ,生物量分别为 1 0 7mg/L和 2 0 5mg/L ;浮游动物平均密度分别为 393个 /L和 6 86个 /L ,生物量分别为 0 79mg/L和 1 15mg/L。结果表明 ,围圈养鱼对水质和浮游生物种类影响不大 ,但对浮游生物的数量有影响 There was no significant change in the water quality inside and outside the circle; 48 and 40 phytoplankton species, 20 species and 19 species of zooplankton, respectively. The average phytoplankton density was 7 14 × 10 5 / L and 9 84 × 10 5, respectively / L, and the biomass was 107 mg / L and 205 mg / L respectively. The average density of zooplankton was 393 / L and 6 86 / L, respectively. The biomass was 0 79 mg / L and 1 15 mg / L, respectively. The results showed that there was little effect on the water quality and plankton species in the perimeter fish culture, but had an impact on the quantity of plankton