Nur Kusuma Dewi, BIOLOGI UNNES and Rosi Prabowo, BIOLOGI UNNES (2017) Determination of Liver Somatic Index (LSI) and Gonadosomatic Index (GSI) Value of Crap (Cyprinus carpio) and Nile tilapia (Perca fluviatilis). International Journal of Scientific and Research Publications, 7 (6). pp. 220-223. ISSN 2250-3153

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Abstract

Heavy metal contamination in water is very dangerous because of its toxicity. Exposure of heavy metal can accumulate in the body tissues of living things lived there. Cadmium (Cd), Lead (Pb) and Mercury (Hg) are heavy metals which highly toxic compared to other heavy metals. Carcinogenic properties of these metals potentially cause cancer in various organs. Kaligarang river is one of the rivers in Semarang which include to the target of Program Kali Bersih (Clean River Program). Its flow is met with the flow of Kreo river which is contamined by heavy metals. This study aimed to determine the exposure of Cd and Pb heavy metals in the Kaligarang river using Cyprinus carpio (Crap) and Perca fluviatilis (Nile tilapia) as a bioindicator. 200 samples of Crap and 200 sampels of Nile tilapia was used in this study to measure their Liver Somatic Index (LSI) and Gonadosomatic Index (GSI). The result showed that the LSI values of Crap in treatment and control group were respectively respectively (1.930 ± 0.186) and (2.756 ± 0.230). LSI values of Nile tilapia in treatment group and control group were respectively (2.244 ± 0.348) and (2.612 ± 0.451). GSI values of Crap in the control group and treatment group were respectively (0.268 ± 0.051) and (0.160 ± 0.039). GSI values of Nile tilapia in the control group and treatment group was respectively (0.230 ± 0.028) and (0.136 ± 0.026). The conclusion of this study is that there was a significant difference of the crap’s LSI value of the control and treatment group, while there was no significant difference on the nile tilapia. For the GSI value, there was a significant difference between the control and treatment group of both the crap and nila tilapia.

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