Fishes   Metals Tissues Muscle Gill Liver   C A T F I S H Cd 0.31 ± 0.01 0.84 ± 0.06 0.41 ± 0.03 Co 3.65 ± 0.03 7.05 ± 0.06 5.28 ± 0.25 Cu 2.53 ± 0.03 4.04 ± 0.08 3.29 ± 0.05 Mn 3.82 ± 0.04 5.16 ± 0.23 7.90 ± 0.29 Fe 55.12 ± 1.13 31.52 ± 1.19 71.55 ± 1.38 Pb 0.73 ± 0.03 5.16  ± 0.12 3.42  ± 0.05 Zn 32.29 ± 1.12 41.84 ± 1.16 53.87 ± 1.5 Cr 0.76 ± 0.02 1.46  ± 0.06 0.83 ± 0.04 Ni 2.17 ± 0.13 3.21  ± 0.03 2.73 ± 0.03     T I L A P I A Cd 0.23 ± 0.01 0.51  ± 0.01 0.32 ± 0.02 Co 3.18 ± 0.07 4.63  ± 0.03 5.15 ± 0.04 Cu 2.13 ± 0.03 3.12  ± 0.02 3.54 ± 0.04 Mn 4.23 ± 0.03 3.61  ± 0.02 6.28 ± 0.05 Fe 24.98 ± 1.27 22.26 ± 1.22 37.96 ± 1.14 Pb 0.52  ± 0.01 3.34  ± 0.04 2.45  ± 0.03 Zn 21.74 ± 1.01 34.56 ± 1.24 27.62 ± 1.01 Cr 0.53  ± 0.01 1.05 ± 0.05 0.73 ± 0.03   Ni 1.87  ± 0.12 1.42 ± 0.12 2.06 ± 0.05   B A R B U S Cd 0.18 ± 0.01 0.24 ± 0.01 0.16 ± 0.01 Co 2.21 ± 0.04 4.43 ± 0.03 6.20 ± 0.04 Cu 1.26 ± 0.02 2.32 ± 0.03 2.23 ± 0.02 Mn 2.11 ± 0.01 4.62 ± 0.05 3.27 ± 0.03 Fe 18.27 ± 0.24 15.13 ± 0.30 25.07 ± 1.03 Pb 0.33  ± 0.01 0.84  ± 0.04 0.41 ± 0.02 Zn 12.60 ± 0.06 15.76 ± 0.08 13.58 ± 0.05 Cr 0.25 ± 0.02 0.74 ± 0.01 0.81  ± 0.02   Ni 1.23 ± 0.04 2.14  ± 0.01 1.56  ± 0.07

Table 3: Levels of trace metals (average ± Sd, n =3, in μg/g, dry weight) in commercially important fishes’ tissue of Tendaho reservoir.