Water Quality Characteristic Of Industrial Shrimp Farming And Effects Of Higher Dissolved Oxygen On Its Farming

Industrial shrimp farming is a new kind of higher density and super-intensive culture in semi-closed or closed water. It is advantageous to making use of resources, reducing pollution of the environment, cutting off dissemination of disease and increasing the farming yield as well, which was commended as a new technique revolution of the shrimp farming. Water quality influences directly the growth condition and the economic performance of the shrimp farming. Increasing oxygen in order to maintain the higher dissolved oxygen (DO) concentration in the water body is one of the main adjusting measures in this farming mode. Therefore, the research on the characteristic of the water quality, the toxicity and immunity influence of the familiar harmful factors (non ion-ammonia and nitrite) under the higher DO concentration condition in the farming process, not only can provide the foundation data for the health shrimp farming mode and maintain the ecological farming environment, but also have important instruction meaning towards raising the farming performance.The experiment studied on the water quality characteristic of industrial shrimp farming and the effects of higher DO on its farming in 2004～2005 years in Qingdao Jiaonan Zhuoyue Ocean Science and Technology Incorporated Company. The budget of DO consumption in industrial shrimp farming was taken the lead in domestic and abroad and its water quality characteristic was studied. While the experiment also studied on the toxic mechanism of ammonia-N and nitrite under higher DO condition, and determined shrimp's healthy status taking advantage of the effect on its immune indexes of ammonia-N and nitrite. The main results as follows:1) Compared with the outdoor soiled ponds, the varying scope of temperature and salinity were narrower in industrial shrimp farming ponds; DO maintained always above a high level; the chlorophyll-a content and pH varied greatly; nitrogen and...