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Table 2 Maximum and Minimum Heavy Metals Concentration in Chrysichthys nigrodigitatus and Oreochromis niloticus

From: Bioaccumulation of heavy metals in silver catfish (Chrysichthys nigrodigitatus) and tilapia fish (Oreochromis niloticus) from the brackish and freshwater in South-West, Nigeria

Heavy Metal Max. mean (mg g−1) Fish spp. by location Mini. mean (mg g−1) Fish spp. By location Recommended limits in fish
Fe 2.02 ± 0.64 LLCN 0.34 ± 0.09 ONLL 146.00 mg (IAEA-407; Wyse et al., 2003)
Cr 0.08 ± 0.00 ARCN 0.05 ± 0.00 ARON (0.020 mg/g) (WPCL, 2004)
Zn 9.56 ± 0.96 LLCN 3.93 ± 0.36 LLON 3.00 mg g−1 (WHO, 2003)
Pb 0.27 ± 0.12 ARCN 0.1 ± 0.00 LLON 0.12 mg g−1 (IAEA-407; Wyse et al., 2003)
Cu 0.89 ± 0.23 LLCN 0.30 ± 0.13 ARCN 3.28 mg g−1 (IAEA-407; Wyse et al., 2003) 0.03 mg g−1 (Khayazadeh and Abbasi, 2010)
  1. LLCN (Lagos Lagoon Chrysichthys nigrodigitatus); ARCN (Asejire Reservoir Chrysichthys nigrodigitatus); LLON (Lagos Lagoon Oreochromis niloticus); ARON (Asejire Reservoir Oreochromis niloticus);