Table 7 Annual mean ± SD of heavy metals (μg/g wet wt.) in O. niloticus muscles from Burullus Lake

Eastern sector

0.84 ± 0.65^a

4.05 ± 0.73^a

10.28 ± 3.82^ab

0.58 ± 0.11^a

0.37 ± 0.14^ab

0.33 ± 0.13^a

Middle sector

0.49 ± 0.26^a

4.25 ± 0.82^a

13.18 ± 6.14^a

0.51 ± 0.11^ab

0.47 ± 0.08^a

0.56 ± 0.31^a

Western sector

0.72 ± 0.60^a

5.79 ± 3.15^a

8.42 ± 3.32^b

0.46 ± 0.06^b

0.32 ± 0.09^b

0.57 ± 0.28^a

*PL (μg/g wet wt.)

1

100

100

0.5–1

30

2

p value

0.348

0.107

0.083

0.037

0.021

0.095