Table 2: Pearson Correlation Coefficient of metals in C. nigrodigitatus.

Cr Cd Fe Ni Cu Zn Pb
Cr 1
Cd -0.292 1
Fe 0.922 -0.246 1
Ni 0.627 0.56 0.577 1
Cu 0.962* -0.055 0.841 0.794 1
Zn 0.887 -0.282 0.996** 0.515 0.786 1
Pb 0.985* -0.197 0.856 0.699 0.990* 0.807 1

*Correlation is significant at the 0.05 level (2-tailed); **Correlation is significant at the 0.01 level (2-tailed).