Authors Specie

Origin

Pb (ppm)

Cu (ppm)

Zn (ppm)

Cd (ppm)

Tuncer and Mg Yaramaz^** (1982) [36]

Bay of Izmir (Turkey)

1.36

6.92

2791.1

Asso^** (1984) [37] Pp

Bay of Algiers (Algeria)

6.31

13.1

200

1.26

Coimbra ^**et al. (1991) [38] Me

Littoral of Portugais

-

13.4

542

1.25

Pempkowiak^** et al. Me (1999) [39]

Sea of Baltic

5.22

13.40

269

-

Tahiri ^***et al. (2005) [34] Mg

Bouregreg (Morocco)

4.08

8.77

225

0.48

Our study^*** Mg

Port of Oran (Algeria)

7.85

0.37

4.59

0.97