Comparative Studies on Primary Productivity of Sewage Fed Freshwater Fishpond in Relation to Production Efficiency of Phytoplankton

The present study emphasizes to measure the gross and net primary productivity of productive freshwater fish culture pond and a nonproductive one and also studied the qualitative and quantitative analysis of the primary producers of the sewage fed fishpond in relation to the production efficiency of phytoplankton. The fertility of any natural water body depends on the productivity of the green plants within it. Thus, primary productivity is the rate at which sunlight is used by plants to produce carbon containing compounds, typically polysaccharides. This study includes the analysis of physicochemical properties of water quality, GPP, NPP and Community respiration and planktonic analysis of sewage fed freshwater fish pond and a non productive pond. Results of Gross Primary Production (GPP) and Net Primary Production (NPP) in sewage fed fishpond are comparatively higher than the non productive one. Community respiration also indicates the positive correlation among the two ponds. Therefore, phytoplankton abundance in sewage fed fish pond shows considerable diversities and densities as compared to nonproductive one. Statistical analysis of outcome result also revealed the significant correlation at 0.01% and 0.05% level.