| Pb | Cd | As | Cr | Hg |
Basal part | 0.82 | 0.028 | 0.022 | 0.42 | ― |
Meat | 0.35 | 0.017 | 0.015 | 0.13 | ― |
Shell | 0.41 | 0.0039 | 0.0079 | 0.41 | ― |