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Dadan Kurnia Wibawa*, Warih Hardanu, Atri Triana K dan Agus Dwiono
Karawang Aquaculture Business Development Center
Pusakajaya Utara, Cilebar, Karawang, Jawa Barat, Indonesia 41353  


A source of problems in shrimp farming activities may come from internal factors of cultivation environment itself. Changes in environmental quality can directly affect to cultivated organisms. Important internal factor is the change in water quality caused by the accumulation of organic matter derived from the residual feed and shrimp feces. The organic material will be converted by microbes into ammonia which is a limiting factor in the life of vannamei shrimp. Disorders of ammonia indicates delays in the process of oxidation of ammonia to nitrite and nitrate so that the process of decomposition of organic material in the form of ammonia is increasing. One effort that can be done using bioremediation method using the plant or algae (seaweed) as well as using other organism which utilize organic material as a food source. This study aims to determine the effectiveness of seaweed (Gracilaria sp.) And blood clams (Anadara granosa) as bioremediator in the change of N and P in vannamei shrimp culture (Litopenaeus vannamei). The research was conducted from August to November 2015. The treatment in this activity using two ponds (1,000m2). The first Pond (treatment A) with shrimp farming vannamei (5 indv/m2) and the second pond (treatment B) with cultivation polyculture shrimp vannamei (5 indv/m2), Shellfish blood (5 g/m2) and Seaweed (10 g/m2). The parameters tested pH, DO, salinity, alkalinity, BOT, the concentration of nitrogen and phosphate. Water quality data were analyzed descriptively. Based on the results of the study found that the treatment of B is more effective in reducing the concentration of nitrate and nitrite and can absorb phosphate concentrations compared to treatment A. This is due to the provision bioremediator (phytoremediator) seaweed and shells visible blood from the initial maintenance vannamei shrimp (Litopenaeus vannamei) , It can be concluded that the seaweed and shellfish can absorb blood concentrations of nitrate, nitrite and phosphate and serves as bioremediator in the changes of N and P on shrimp farming vannamei.

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