Table 8 Seasonal mean ± SD of heavy metals in water (μg/L) and in O. niloticus muscles (μg/g wet wt.) from Burullus Lake during 2014

Winter

1.03 ± 0.96

17.0 ± 13.49

14.05 ± 5.44

3.66 ± 0.70

1.64 ± 0.77

1.80 ± 1.54

1.10 ± 0.47

4.73 ± 0.87

13.32 ± 4.04

0.47 ± 0.09

0.45 ± 0.12

0.55 ± 0.31

Summer

1.15 ± 1.01

4.01 ± 1.18

44.70 ± 30.9

10.08 ± 1.13

2.46 ± 0.83

8.07 ± 3.73

0.27 ± 0.07

4.67 ± 2.77

7.93 ± 4.13

0.56 ± 0.09

0.32 ± 0.09

0.37 ± 0.18

p value

0.842

0.041

0.038

< 0.0001

0.108

0.030

< 0.0001

0.937

0.001

0.012

0.002

0.066