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Concentrations of metals in surrounding waters adjacent to shrimp farms in tayu sub district, regency of pati, central java

Ruzkiah Asaf*, Rezki Antoni and Erna Ratnawati
Research Institute for Coastal Aquaculture
Jl. Makmur Dg. Sitakka No 129, Maros, South Sulawesi,
Indonesia, 90512.

The quality of surrounding waters has a pivotal role on the success of shrimp aquaculture in most Indonesian shrimp farms. The chemicals applied in the catchment areas may transport by water to the coastal area then increases concentrations of metals in the water. However, information on concentrations of metals around shrimp farms in Indonesia is still scarce. This study was aimed to analyze concentrations of heavy metals of surrounding waters of shrimp farms. A total of 18 stations throughout Tayu sub district which were artesian well, rice fields, fish market, estuarine, coastal and river for K, Na, Ca, Mg, Fe, Mn, Cu, Zn, Pb, Cd, Co, Ni, Cr, As, Hg, B and Mo analysis. Concentrations K, Na, Ca, Mg, Fe, Mn, Cu, Zn, Pb, Cd, Co, Ni, and Cr were analyzed under SSA methods, whereas concentrations of As, Hg, B and Mo were analyzed using MP_AES methods. The results of this study indicated that concentrations of Ca, Mg, Fe, Mn, Pb, Co, Ni, As and Hg in the estuarine, river, coastal and rice fields exceeded the concentrations threshold issued by the Indonesian Government. In contrast, concentrations of K, Na, Cd, Cr, Cu, Zn were in accepted concentrations regulated by the Indonesian Government. The findings of this study indicated chemicals applied in the rice fields and the coastal areas might increase concentrations of these metals in the surrounding waters adjacent to shrimp farms in Tayu sub district. In addition, anticipation on metals contamination on shrimp produced from pond aquaculture should be addressed.

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