Bioaccumulation of Cadmium in Channa striata Fish from the Miai River, Banjarmasin, South Kalimantan

Nurhilaliyyah Nurhilaliyyah (Department of Biology, Faculty of Mathematics and Natural Sciences, Lambung Mangkurat University, Banjarbaru, South Kalimantan, Indonesia)
Heri Budi Santoso (Biology Study Program, Faculty of Mathematics and Natural Sciences, Lambung Mangkurat University)
Muhamat Muhamat (Department of Biology, Faculty of Mathematics and Natural Sciences, Lambung Mangkurat University, Banjarbaru, South Kalimantan, Indonesia)
Hameda Dhaka Kusuma Taufiq (Department of Biology, Faculty of Mathematics and Natural Sciences, Lambung Mangkurat University, Banjarbaru, South Kalimantan, Indonesia)

Jurnal Biologi Tropis
Vol. 26 No. 2 (2026): April - Juni

The Miai River in Banjarmasin is a habitat for the snakehead fish (Channa striata) located in a densely populated area with high human activity, potentially polluted by heavy metals such as cadmium. This study is important to monitor heavy metal concentration & their risks to the health & sustainability of the river ecosystem. The method used was purposive sampling with samples in the form of river water & snakehead fish (C. striata) at two different stations. Heavy metal analysis used Atomic Absorption Spectrophotometry (AAS). The results showed that kadmium concentration in water & fish at both stations were still safe or below the established quality st&ards. There was a significant negative correlation between the two (r=-0.472) & between cadmium concentration in fish & fish weight (r:-0.424). The conclusion of this study is that cadmium concentration in water can reduce fish quality & potentially pose a health risk to humans. The implications of this study emphasize the need for routine monitoring & preventive measures for heavy metal contamination.