In this project, we build up the ecological aquaculture system to cultivate Paralichthys olivaceus、Caulerpa lentillifera、Oplegnathus fasciatus and Botryocladia leptopoda. According to the results, the growth performance of Paralichthys olivaceus demonstrate that there is no significant difference between groups. The growth performance of Caulerpa lentillifera, the group 2000g/m2 demonstrate that the final weight of experiment group was 3355.33±41.63g, significantly better than the final weight of control group, 2758.67±151.77g. The growth performance of Oplegnathus fasciatus, the final weight of experiment group was 4.62±0.39g, significantly better than the final weight of control group, 4.14±0.52g. The growth performance of Botryocladia leptopoda, the final weight of experiment groups(group 500g/m2:Ctrl-1180.33±154.62g、Exp-2357.00±185.81g、group 1000g/m2:Ctrl- 2275.33±194.25g、Exp3558.67±118.46g、group 2000g/m2:Ctrl- 3357.00±160.39g、Exp3848.00±70.77g) were all significantly better than the final weight of control group. The weight gain rate of Caulerpa lentillifera, (group 2000g/m2:Ctrl-37.93±7.59%、Exp-67.77±2.08%) demonstrate that the values of experiment group were significantly better than the values of control group. The weight gain rate of Oplegnathus fasciatus, (Ctrl-72.62±6.69%、 Exp-91.14±8.84%) demonstrate that the values of experiment group were significantly better than the values of control group. The weight gain rate of Botryocladia leptopoda, (group 500g/m2:Ctrl-136.07±30.92%、Exp371.40±37.16%;group 1000g/m2:Ctrl-1.95±0.21%、Exp-3.02±0.08%;group 2000g/m2:Ctrl-67.85±8.02%、Exp-92.40±3.54%)demonstrate that the values of experiment group were all significantly better than the values of control group. The specific growth rate (SGR%) of Caulerpa lentillifera, (group 2000g/m2:Ctrl-0.76±0.13、Exp-1.23±0.03) demonstrate that the values of experiment group were significantly better than the values of control group. The specific growth rate of Oplegnathus fasciatus, (Ctrl1.30±0.09、Exp-1.54±0.11) demonstrate that the values of experiment group were significantly better than the values of control group. The specific growth rate of Botryocladia leptopoda, (group 500g/m2:Ctrl-2.03±0.31、 Exp-3.69±0.19;group 1000g/m2:Ctrl-1.95±0.21、Exp-3.02±0.08;group 2000g/m2:Ctrl-1.23±0.11、Exp-1.56±0.04)demonstrate that the values of experiment group were all significantly better than the values of control group. According to the data of growth performance, the values of Caulerpa lentillifera、Oplegnathus fasciatus and Botryocladia leptopoda demonstrate that cultivate with the ecological aquaculture system were significantly better than without the system.
On the other hand, the benefit of water saving, take this experiment as an example, the water volume of the aquaculture facility was 4 ton per pond (2.8m*2.3m*0.65m). We compose 4 ponds as an group, and change the water 6 times per day, it means that each group needs 24(4 ton *6 times) tons of water per day. If cultivate without the system, but cultivate same species and using the same size of aquaculture facilities, the water consumption will be 96 (4 ponds*4 tons*6 times) tons per day. Therefore, cultivate with the ecological aquaculture system may saving 72 tons of water per day. It means the effectiveness of water saving can reach 75%.