Table 4.
The cancer risk for heavy metals from consumption of two fish species obtained from Ogun and Eleyele River.
| Site | Specie | Organ | Cancer Risk (10−5) |
||||
|---|---|---|---|---|---|---|---|
| As | Cd | Cr | Ni | Pb | |||
| Ogun River | Clarias gariepinus | Liver | 10.0 | 2.91 | – | 1.52 | 0.0045 |
| Muscle | 7.94 | – | 0.074 | 2.01 | 0.010 | ||
| Gills | 130.0 | 0.78 | 0.030 | 3.07 | 0.0089 | ||
| Sarotherodon melanotheron | Liver | 43.0 | 3.06 | 0.089 | 2.6 | 0.012 | |
| Gills | 52.0 | 3.97 | 0.030 | 2.99 | 0.011 | ||
| Muscle | 29.0 | 3.01 | 0.059 | 2.33 | 0.0065 | ||
| Eleyele River | Clarias gariepinus | Gills | 16.0 | 3.12 | 0.089 | 2.25 | 0.011 |
| Liver | – | 2.47 | 0.030 | 2.25 | 0.0089 | ||
| Muscle | 31.0 | 2.03 | 0.089 | 1.11 | 0.0057 | ||
| Sarotherodon melanotheron | Gills | 4.56 | 2.70 | 0.0089 | 2.56 | 0.0015 | |
| Liver | – | – | – | 2.27 | 0.0033 | ||
| Muscle | – | 0.62 | 0.012 | 1.07 | 0.011 | ||