不同沉水植物对日本沼虾生长存活及水环境影响特征OA

To reveal the effect of submerged macrophytes on the cultivation of Macrobrachium nipponense,a 90-day microcosmic experiment was conducted.The experiment aimed to simulate the cultivation system of three different macrophytes,namely Hydrilla verticillata(H),Potamogeton crispus(P),and Vallisneria natans(V),both individ-ual and in pairwise combinations.The emphasis was to evaluate the effects of these macrophytes on the growth,sur-vival,and aquatic environment characteristics of M.nipponense.The results of the experiment showed that the pres-ence of H.verticillata,and V.natans,and their combinations effectively enhanced spatial heterogeneity and main-tained water quality parameters,such as pH,dissolved oxygen(DO)levels,and water transparency.However,it was observed that the transparency of the H.verticillata and H.verticillate+V.natans groups significantly increased during the later stages of the experiment,while the chlorophyll a content significantly decreased(P＜0.05)in the later stage of the experiment.The survival rate of M.nipponense was found to be higher in the H.verticillata,V.na-tans,and their combination groups compared to the control group.Additionally,the shrimp's survival rate and bio-mass showed a significantly positive correlation with the biomass of H.verticillata(P＜0.01),indicating that the presence of H.verticillata significantly promoted the growth and survival of M.nipponense.Those findings provide val-uable insights for optimizing ecological aquaculture patterns and improving the overall quality and efficiency of M.nip-ponense cultivation.[Chinese Fishery Quality and Standards,2023,13(6):01-10]