Concentrations (µg/g)    
LIVER GILLS STOMACH FLESH
o, p'-DDE 6.32a ± 0.19 5.43b ± 0.27 5.11c ± 0.43 4.32d ± 0.87
p,p’-DDD 5.66a ± 1.09 4.32b ± 0.87 3.54c ± 0.58 2.43a ± 0.11
o,p’-DDD 3.72a ± 0.18 3.22a ± 0.08 2.86b ± 0.37 2.32c ± 0.16
p,p’-DDT 4.55a ± 0.06 4.21a ± 0.23 3.67b ± 1.21 2.76c ± 0.15
Alpha BHC 7.56a ± 1.73 6.54b ± 1.27 5.34c ± 0.66 4.33d ± 0.14
Gamma BHC 6.22a ± 0.37 4.77b ± 1.03 4.35c ± 0.63 3.65d ± 0.24
Metoxichlor 3.54a ± 0.27 2.66b ± 0.13 1.87c ± 0.44 1.45d ± 0.11
Lindane 4.07a ± 1.31 3.25b ± 0.42 3.78c ± 0.01 2.65d ± 0.37
Endosulfan 8.98a ± 0.02 7.45b ± 0.22 5.43c ± 1.11 4.81d ± 0.71
Aldrin 3.45a ± 0.55 3.07a ± 0.15 2.42b ± 0.61 1.72c ± 0.02
Dieldrin 5.65a ± 1.25 5.22a ± 0.52 4.66b ± 0.82 4.07c ± 0.18
Within rows mean and standard deviation with difference letters are statistically significant P<0.05.
Table 4: Mean Concentrations of Some Organochlorine Pesticide Residues in different organs of Oreochromis niloticus from Alau Dam.