Table 1 Levels of heavy metals in Taihu Lake fish
Category
|
Heavy metals (mg/kg dw)
|
Hg
|
Pb
|
Cd
|
As
|
Zn
|
Cr
|
Herbivorous fish
|
Minimum
|
0.0400
|
0.0380
|
0.0050
|
0.1410
|
25.2000
|
0.0377
|
5%percentile
|
0.0435
|
0.0362
|
0.0059
|
0.1413
|
25.7300
|
0.0586
|
Q1
|
0.0575
|
0.0370
|
0.0093
|
0.1425
|
27.8500
|
0.2076
|
Q2
|
0.0750
|
0.0380
|
0.0135
|
0.1440
|
30.5000
|
0.3229
|
Q3
|
0.1030
|
0.1065
|
0.0178
|
0.2015
|
31.2000
|
0.3518
|
95%percentile
|
0.1254
|
0.1613
|
0.0212
|
0.2475
|
31.7600
|
0.4523
|
Maximum
|
0.1310
|
0.175
|
0.0220
|
0.2590
|
31.9000
|
0.4950
|
Mean
|
0.0820
|
0.0833
|
0.0135
|
0.1813
|
29.2000
|
0.2821
|
S.D.
|
0.0372
|
0.0651
|
0.0085
|
0.0549
|
2.8856
|
0.1453
|
Omnivorous fish
|
Minimum
|
0.027
|
ND
|
ND
|
0.102
|
14
|
ND
|
5%percentile
|
0.0834
|
0.02
|
0
|
0.1221
|
18.168
|
0.1275
|
Q1
|
0.042
|
0.08
|
0.01
|
0.2205
|
34.17
|
0.2967
|
Q2
|
0.073
|
0.177
|
0.0218
|
0.4668
|
63.33
|
0.53
|
Q3
|
0.118
|
0.56
|
0.1159
|
1.1325
|
102.7
|
0.9418
|
95%percentile
|
0.2984
|
3.746
|
1.17
|
3.4855
|
348.104
|
4.67
|
Maximum
|
0.32
|
23.88
|
1.58
|
3.77
|
907
|
25
|
Mean
|
0.1029
|
1.4201
|
0.1710
|
0.967
|
105.4297
|
1.2854
|
S.D.
|
0.0298
|
4.2214
|
0.3516
|
1.0814
|
141.5803
|
3.4756
|
Carnivorous fish
|
Minimum
|
0.037
|
ND
|
ND
|
0.04
|
18.3
|
ND
|
5%percentile
|
0.0508
|
0.015
|
0
|
0.1048
|
20.882
|
0.2276
|
Q1
|
0.09
|
0.043
|
0.01
|
0.223
|
33.5404
|
0.3505
|
Q2
|
0.143
|
0.0815
|
0.015
|
0.4309
|
60.55
|
0.46
|
Q3
|
0.2
|
0.184
|
0.039
|
0.78
|
71.95
|
0.62
|
95%percentile
|
0.306
|
3.8438
|
0.529
|
3.801
|
111.676
|
1.4
|
Maximum
|
0.521
|
9.68
|
14.005
|
3.99
|
157.675
|
3.6
|
Mean
|
0.1671
|
0.7235
|
0.4315
|
0.7942
|
60.1443
|
0.6213
|
S.D.
|
0.1078
|
1.8955
|
2.2094
|
1.0923
|
32.8635
|
0.5901
|
Note: S.D. standard deviation, Q1: First quartile, Q2: Second quantile, Q3: Third quantile, ND: not detected, dw: dry wight
Table 2 The PI and MPI value of fish with different habits
Area
|
Species
|
PI
|
|
|
|
|
|
MPI
|
Hg
|
Pb
|
Cd
|
Zn
|
As
|
Cr
|
Upper
|
Hypophthalmichthys molitrix
|
0.273
|
13.618
|
3.579
|
0.383
|
2.586
|
1.309
|
2.003
|
Hemiculter leucisculus
|
0.332
|
0.092
|
0.39
|
0.495
|
0.252
|
0.188
|
0.319
|
Middle-upper
|
Aristichthys nobilis
|
0.184
|
0.256
|
0.172
|
0.331
|
0.27
|
0.111
|
0.259
|
Coilia ectenes Seale
|
0.361
|
16.107
|
6.32
|
0.550
|
3.89
|
0.652
|
2.402
|
Toxabramis swinhonis
|
0.608
|
0.306
|
1.51
|
1.001
|
0.516
|
0.165
|
0.669
|
Cultrichthys erythropterus
|
0.286
|
0.226
|
0.13
|
0.281
|
0.252
|
0.144
|
0.262
|
Culter alburnus
|
0.372
|
0.064
|
0.03
|
0.211
|
0.27
|
0.165
|
0.171
|
Chanodichthys dabryi
|
0.138
|
0.256
|
0.28
|
0.523
|
0.578
|
0.185
|
0.357
|
Acheilognathus rhombeus
|
0.098
|
0.262
|
0.16
|
0.669
|
0.396
|
0.220
|
0.311
|
Middle-lower
|
Parabramis pekinensis
|
0.262
|
0.076
|
0.22
|
0.213
|
0.288
|
0.176
|
0.237
|
Ctenopharyngodon idellus
|
0.15
|
0.072
|
0.05
|
0.203
|
0.282
|
0.248
|
0.175
|
Megalobrama amblycephala
|
0.08
|
0.35
|
0.18
|
0.168
|
0.518
|
0.154
|
0.252
|
Hemibarbus maculatus
|
0.54
|
19.36
|
10.6
|
0.464
|
7.56
|
0.87
|
1.938
|
Saurogobio dabryi
|
0.084
|
0.174
|
0.21
|
0.093
|
0.252
|
0.150
|
0.185
|
Acheilognathus macropterus
|
0.154
|
0.122
|
0.3
|
0.685
|
0.736
|
0.143
|
0.339
|
Neosalanx taihuensis
|
0.074
|
0.166
|
0.38
|
0.444
|
1.138
|
0.215
|
0.352
|
Paracanthobrama guichenoti
|
0.134
|
0.072
|
0.14
|
0.241
|
0.496
|
0.166
|
0.215
|
Bottom
|
Silurus asotus
|
1.042
|
0.264
|
0.15
|
0.207
|
0.08
|
0.158
|
0.272
|
Carassius auratus
|
0.28
|
13.456
|
6.576
|
1.564
|
4.2
|
1.146
|
2.979
|
Cyprinus carpio
|
0.243
|
8.996
|
3.927
|
1.703
|
3.538
|
1.812
|
2.657
|
Pelteobagrus fulvidraco
|
0.422
|
7.578
|
3.32
|
0.496
|
3.778
|
0.541
|
1.852
|
Hemisalanx prognathus
|
0.62
|
13.26
|
4.7
|
0.452
|
4.46
|
0.65
|
2.398
|
Carassius carassius
|
0.204
|
1.103
|
0.554
|
0.857
|
0.204
|
0.130
|
0.469
|
Mean
|
|
0.302
|
4.184
|
1.908
|
0.532
|
1.53
|
0.422
|
|
Table 3 ILCR values for adults and children from exposure to heavy metals in fish from Taihu Lake
|
Herbivorous fish
|
Omnivorous fish
|
Carnivorous fish
|
Adult
|
Child
|
Adult
|
Child
|
Adult
|
Child
|
Pb
|
4.20E-07
|
9.81E-07
|
1.73E-05
|
4.04E-05
|
3.37E-06
|
7.86E-06
|
Cd
|
3.02E-06
|
7.04E-06
|
6.53E-05
|
1.52E-04
|
1.27E-04
|
2.96E-04
|
As
|
2.97E-05
|
6.93E-05
|
1.74E-04
|
4.06E-04
|
9.25E-05
|
2.16E-04
|
Total
|
3.31E-05
|
7.73E-05
|
2.57E-04
|
5.99E-04
|
2.23E-04
|
5.19E-04
|