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Heavy Metals in Some Fish Species and Bivalves from the Mediterranean Coast of Egypt

DOI: 10.4236/jep.2015.61001    5,514 Downloads   6,558 Views   Citations

ABSTRACT

Biota samples were collected seasonally during three consecutive years from the Egyptian costal region along the Mediterranean Sea for analysis of Zn, Cu, Cd, Pb and Hg. In addition to bivalve Donax, seven commercially important species of fish were examined to provide a comprehensive assessment for the concentrations of these metals in the Mediterranean coastal region of Egypt. Despite of the presence of several land-based sources of contamination, particularly at El-Mex Bay and El-Maadiya, the results showed very weak increase in the concentration of copper, lead and mercury revealing no accumulation of these metals in the biological material, even in non-migrant bivalve species such as Donax. However, an increase in the concentration of zinc and cadmium in fish tissues was measured from 1993 to 1995. Regardless of the fish species, no significant differences were observed in concentrations of most metals between different locations and from season to season. Regarding concentrations of most metals, no interspecies differences could be also measured in either fish tissues or in bivalve Donax. The study indicated that the concentration of these heavy metals were well below the documented toxic levels for human consumption and represent baseline levels against which possible future heavy-metal contamination can be measured.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Shreadah, M. , Fattah, L. and Fahmy, M. (2015) Heavy Metals in Some Fish Species and Bivalves from the Mediterranean Coast of Egypt. Journal of Environmental Protection, 6, 1-9. doi: 10.4236/jep.2015.61001.

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