ASSESSMENT OF HEAVY METALS AND NONESSENTIAL CONTENT OF SOME EDIBLE AND SOFT TISSUES

ASSESSMENT OF HEAVY METALS AND NONESSENTIAL
CONTENT OF SOME EDIBLE AND SOFT TISSUES
HODA H.H. AHDY, ALY M. ALY ABDALLAH AND FATHY T. TAYEL
National Institute of Oceanography and Fisheries, Alexandria, Egypt
E-mail: [email protected]
Keywords: Heavy metals, Crustacea, Cephalopoda, Bivalve, Fish, Mediterranean Sea.
ABSTRACT
The level concentrations of heavy metals (essential and nonessential) were measured in
different marine biota including cephalopoda, bivalve, crustacean and fish. The results
reveal that these organisms show more or less the same order of distribution for each of the
metals studied. The average concentrations of heavy metals exhibited the following
decreasing order: cephalopoda > bivalve > crustacean > fish. The levels of metals in all
studied samples are still comparable to those in their corresponding in the Mediterranean
Sea. K (98-181µg/g) and Ca (547-1472 µg/g) were present at the highest concentrations in
all investigated samples. Octopus and Sepia do not follow the general pattern. The highest
value of Metal Pollution Index (MPI) in cephalopod was recorded in octopus (9.55)
followed by sepia (7.62). Among investigated bivalve, the highest values of MPI were
recorded in Mactra coralline (2.87).