Concentrations (µg/g)    
LIVER GILLS STOMACH FLESH
o, p'-DDE 2.17a ± 0.05 1.05b ± 0.07 0.56c ± 0.04 0.22a ± 0.01
p,p’-DDD 2.45a ± 0.33 1.44b ± 0.05 1.05c ± 0.01 0.54d ± 0.03
o,p’-DDD 1.31a ± 0.01 1.04a ± 0.07 0.33b ± 0.02 0.26c ± 0.04
p,p’-DDT 0.77a ± 0.05 0.54a ± 0.01 0.25b ± 0.02 0.16c ± 0.03
Alpha BHC 3.44a ± 0.11 2.15b ± 0.24 1.34c ± 0.08 0.43d ± 0.12
Gamma BHC 4.21a ± 0.44 3.06b ± 0.16 2.21c ± 0.16 1.65d ± 0.22
Metoxichlor 0.35a ± 0.18 0.22b ± 0.01 0.17c ± 0.02 0.12d ± 0.01
Lindane 2.32a ± 0.23 1.65b ± 0.33 1.22c ± 0.07 0.65d ± 0.01
Endosulfan 4.55a ± 0.23 2.43b ± 0.17 2.11c ± 0.43 1.27d ± 0.47
Aldrin 0.85c ± 0.22 0.54b ± 0.06 0.41c ± 0.02 0.13 ± d0.01
Dieldrin 3.43a ± 0.77 2.89b ± 0.51 2.65c ± 0.28 2.23d ± 0.66
Within rows mean and standard deviation with difference letters are statistically significant P<0.05
Table 3: Mean Concentrations of Some Organochlorine Pesticide Residues in different organs of Heterotis niloticus from Alau Dam.