Histopathology of liver and intestine of pangkilan bare fish (Oryzias matanensis) Polluted by nickel and iron in Lake Matano, South Sulawesi

Abstract

Abstract Pangkilan Bare fish or Matano Medaka fish ( Oryzias matanensis ) is one of the most endemic species of freshwater fish that lives on Lake Matano. The purpose of this study was to determine the histopathology of the liver and intestines of the Matano Medaka fish contaminated by iron and nickel. The samples used were 6 fish with average size was 48.36 mm ± 0.74 mm. Samples were then processed with host technique analysis. Based on the results of this study obtained histopathological change that occurs in the liver and intestine in the form of hemorrhage, necrosis, fat degeneration, hydropic degeneration, lysis of hepatocytes and numerous melano macrophage. The results of measuring the water content of Matano lake contain iron (Fe) <0.03 mg / L and nickel (Ni) <0.07 mg / L. Therefore, the results of measurements of metal content in Matano lake sediments contain iron (Fe) 3.08% and nickel (Ni) 0.15%. The results of these measurements averaged above the threshold. Therefore, the high concentration of metals is thought to have a relationship with the abnormal tissue of fish organs observed in this study.

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