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Table 2 Metal composition of water samples of ten selected aquaculture ponds (mg/L)

From: Metal contamination and coexistence of metal and antibiotic resistance in Vibrio species recovered from aquaculture ponds with and without history of antibiotic usage in Southwest Nigeria

Metal Pond 1 Pond 2 Pond 3 Pond 4 Pond 5 Pond 6 Pond 7 Pond 8 Pond 9 Pond 10 NESREA limit
Cu 0.01 ± 0.00 0.01 ± 0.02 0.01 ± 0.00 0.01 ± 0.00 0.04 ± 0.01 0.01 ± 0.00 0.01 ± 0.00 0.09 ± 0.01 0.06 ± 0.01 0.01 ± 0.00 0.001
Zn 0.19 ± 0.04 0.22 ± 0.02 0.48 ± 0.04 0.15 ± 0.01 4.58 ± 0.03 0.89 ± 0.06 2.31 ± 0.05 1.96 ± 0.01 1.07 ± 0.03 2.82 ± 0.04 0.01
Pb 0.01 ± 0.00 0.01 ± 0.00 0.01 ± 0.00 0.02 ± 0.00 0.07 ± 0.01 0.19 ± 0.02 0.26 ± 0.02 0.19 ± 0.00 0.29 ± 0.02 0.29 ± 0.02 0.01
Ni ND ND ND ND 0.47 ± 0.03 0.80 ± 0.01 0.22 ± 0.00 0.28 ± 0.03 0.17 ± 0.02 0.39 ± 0.01 0.01
Cr 0.35 ± 0.00 0.87 ± 0.03 1.36 ± 0.11 1.14 ± 0.04 1.43 ± 0.02 1.14 ± 0.05 2.11 ± 0.13 2.63 ± 0.03 2.57 ± 0.00 1.79 ± 0.03 0.001 (Cr6+)
  1. Note: Each value is a mean of three replicate samplings. Ponds 1–5: ponds with history of antibiotic usage; Ponds 6–10: ponds without history of antibiotic usage
  2. Cu copper, Zn zinc, Pb lead, Ni nickel, Cr chromium, ND Not detected, NESREA National Environmental Standards and Regulations Enforcement Agency