International Journal of Marine Science 2016, Vol.6, No.26, 1-13
6
Table (2): Duncan’s multiple range test showing significant differences of metals in sediments at different stations.
St.1
St.2
St.3
St.4
St.5
St.6
Cd
St.1
St.2
St.3
St.4
St.5
St.6
St.7
0.7962
0.0819
0.7782
0.1949
0.1151
0.0892
0.0580
0.6052
0.1406
0.0819
0.1180
0.1190
0.5312
0.7962
0.0063*
0.2707
0.1650
0.0628
0.6907
0.0134*
0.0084*
Pb
St.1
St.2
St.3
St.4
St.5
St.6
St.7
0.0584
0.6270
0.6830
0.9366
0.4905
0.3972
0.0304*
0.0984
0.0631
0.1414
0.0179*
0.3966
0.5868
0.2688
0.6819
0.7301
0.7563
0.2354
0.5319
0.3656
0.1553
Cu
St.1
St.2
St.3
St.4
St.5
St.6
St.7
0.0018*
0.8170
0.2979
0.7378
0.4083
0.6785
0.0015*
0.0048*
0.0024*
0.0041*
0.0013*
0.2214
0.5880
0.3101
0.8411
0.4466
0.7932
0.1694
0.5903
0.4731
0.2404
Zn
St.1
St.2
St.3
St.4
St.5
St.6
St.7
0.1396
0.2126
0.2117
0.6796
0.5155
0.2462
0.0216*
0.7478
0.0796
0.3338
0.0251*
0.0326*
0.3597
0.0864
0.8976
0.1225
0.4818
0.0379*
0.3182
0.4063
0.1010
Heavy metals in sediments of the present study area were lie within the range of those recorded in other Egyptian
coastal areas and elsewhere (El-Moselhy and Gabal, 2004; Hamed and Emara, 2006; El-Moselhy and Hamed,
2006; Sany
et al
., 2011; Abouhend, 2013; Zaghloul, 2015 and Saad
et al
., 2016). By comparing the present data
with the background concentrations and typical levels of metals in sediments which were 0.30, 39.0, 19.0 and 98.0
µg/g (Bryan, 1985), it can be noticed that the levels of metals in the present study showed lower concentrations,
except Cd(II) ion in sediments of all stations, Pb(II) and Cu(II) ions in station 2 which were higher than the
background concentration.
4.2 Heavy metals in
Brachidontes variabilis
The concentrations of Cd, Pb, Cu and Zn in bivalve
B. variabilis
collected during summer and winter from
different stations along the western side of the northern part of the Gulf of Suez are presented in Table (3). Zn was
the highest recorded metal in the investigated species followed by Cu and Pb, while Cd was the lowest one. Cd,
Pb and Zn exhibited their high mean values during summer season; while, Cu was found in winter season (Fig. 3).
