Comparison of physico- chemical parameters from two different shrimp ponds (special reference with penaeus monodon and litopenaeus vannamei) along the South east coast of Tamilnadu

Shrimp culture in ponds has been one of the major sources of livelihoods for the fish farmers whereas shrimp disease is the most serious problem that the farmers have been facing. Although shrimp farming has been quite successful and the technology has continually improved, it has caused some environmental damage such as eutrophication, sedimentation in coastal area, chemical bioaccumulation in waterborne and deleterious pond bottom soil. In the present study fluctuation of pH ratio was between 7.9 and 8.8 in the early morning, while fluctuation of pH value was between 8.0 and 8.4 in the station 1 and 7.5 to 8.2 in the station 2. In station 1 DO values fluctuated varied between 5.5 mg/l and 3.5 mg/l in the morning and between 5.5 mg/l to 6.5 mg/l in the evening and in the station 2 DO values vary from 2.7 to 5.5 in the morning and 5.0 to 7.0 mg/l in the evening. The high survival rate was recorded in station 2 (70%) and the low survival was recorded in station 1 (70%). Maximum production was station 1 and 2 was 31grm, 37grms respectively. The highest microbial load recorded in the station 1 was 150 and station 2 was 80. The present study confirming that, if we maintain the microbial population and water quality parameters in proper way, definitely famers can achieve their production and profit.