In agreement with the literature, the hepatopancreas (Hep, detoxification tissues) of the red swamp crayfish showed a higher concentration of heavy metals in comparison to the abdominal muscle (AbM, not detoxification tissues) in the sites under scrutiny.
Specifically we found that Hep/AbM ratio decreases as follows: Cd (11.7) N Cu (5.5) N Pb (3.6) N Zn
(1.0) and Pb (4.34) N Cd (3.66) N Zn (1.69) N Cu (0.87) for the industrial and reference sites, respectively