Table 1 Accumulation concentration and toxicity equivalent (pg/g) of dioxins and dioxin-like polychlorinated biphenyls in eel culture system

farm-1

eel

19.49 ± 0.97^b

511.49 ± 25.57^b

0.37 ± 0.02^b

0.72 ± 0.04^b

fodder

7.89 ± 0.39^b

27.95 ± 1.40^c

0.05 ± 0.00^c

0.09 ± 0.00^d

water

6.81 ± 0.34^b

18.04 ± 0.90^c

0.48 ± 0.02^b

0.51 ± 0.03^bc

plant

13.84 ± 0.69^b

28.41 ± 1.42^c

0.33 ± 0.02^bc

0.41 ± 0.02^c

soil

5553.32 ± 277.67^a

5557.86 ± 277.89^a

6.72 ± 0.34^a

6.74 ± 0.34^a

farm-2

eel

1.69 ± 0.08^b

201.61 ± 10.08^b

0.13 ± 0.01^c

0.33 ± 0.02^bc

fodder

1.43 ± 0.07^b

72.1 ± 3.61^b

0.03 ± 0.00^c

0.1 ± 0.01^c

water

11.68 ± 0.58^b

24.26 ± 1.21^b

0.52 ± 0.03^b

0.54 ± 0.03^b

plant

7.14 ± 0.36^b

23.02 ± 1.15^b

0.3 ± 0.02^bc

0.34 ± 0.02^bc

soil

7741.39 ± 387.07^a

7743.53 ± 387.18^a

8.55 ± 0.43^a

8.57 ± 0.43^a

farm-3

eel

30.11 ± 1.51^b

616.56 ± 30.83^b

0.54 ± 0.03^b

1.05 ± 0.05^b

fodder

1.51 ± 0.08^b

86.76 ± 4.34^b

0.03 ± 0.00^b

0.12 ± 0.01^c

water

6.05 ± 0.30^b

17.74 ± 0.89^b

0.56 ± 0.03^b

0.59 ± 0.03^bc

plant

49.45 ± 2.47^b

73.14 ± 3.66^b

0.35 ± 0.02^b

0.43 ± 0.02^bc

soil

15,044.76 ± 752.24^a

15,046.51 ± 752.33^a

15.74 ± 0.79^a

15.75 ± 0.79^a

farm-4

eel

4.38 ± 0.22^b

351.57 ± 17.58^b

0.15 ± 0.01^cd

0.5 ± 0.03^c

fodder

1.55 ± 0.08^b

128.91 ± 6.45^c

0.01 ± 0.00^d

0.07 ± 0.00^e

water

8.94 ± 0.45^b

18.81 ± 0.94^c

0.72 ± 0.04^b

0.74 ± 0.04^b

plant

6.9 ± 0.35^b

45.5 ± 2.28^c

0.17 ± 0.01^c

0.25 ± 0.01^d

soil

2626.08 ± 131.30^a

2626.21 ± 131.31^a

3.19 ± 0.16^a

3.2 ± 0.16^a