Fig. 2
Concentrations of As, Cd, Hg and Pb in AM (white box) and WB (grey box) of crayfish from CRCS and CICS (µg/kg, dry weight). The line in the box represents the median value; the bottom and the top of each box represent 5th and 95th percentiles, respectively; ** represents p < 0.01. Heavy metal concentration below the LOQ was substituted by half the LOQ during the analysis. LOQ of As, Cd, Hg and Pb were 1 µg/kg, 1 µg/kg, 1 µg/kg and 5 µg/kg, respectively