Abstrak Lead and Cadmiun Concentration in Catfish (Pangasius polyuronodon) of the Lower Part of Siak River
Chapter 2010 with 414 download times
Siak River is one of four big rivers in Riau Province suffered from anthropogenic substances deriving from various human activities. The substances not only degrade the water quality but also influence aquatic organisms such as fish. The effect of this substances not only directly such as sudden mass mortality of fish but also indirectly through bioaccumulation and biomagnification in fish body which could increase the exposure to public health risks. Study on two heavy metals (lead and cadmium) concentration in fish gill, liver and muscle was conducted in the lower part of Siak River starting from Pelita Pantai to Siak lndrapura. It can be concluded that concentration of cadmium in fish gill in four sampling sites, Pelita Pantai, Maredan, Perawang, and Buatan was exceeded of the acceptable limits by the National Drug and Food Standards of Indonesia, more than 0.2 mg/kg dry weight. The similar concentration was also recorded in the fish liver in Buatan site, and in fish muscle in Siak lndrapura site. To sustain the existence of some economical fish such as cat fish, broad study on heavy metal accumulation in fish organs and its effect on reproduction of the fish should be considered.
KEYWORDS: heavy metals, accumulation, catfish, Siak River