Table 2.
Liver/ muscle index in three indicator fish species, predators and non-predators, from heavily (HC) and lightly contaminated (LC) localities (effect of age subtracted).
| Fish species | Locality contamination | N | Mean | Median | Minimum | Maximum | Std.Dev. | Mann-Whitney U test |
|---|---|---|---|---|---|---|---|---|
| PERCH | HC | 71 | 0.202 | 0.139 | -0.791 | 1.514 | 0.549 | U = 268 |
| LC | 32 | -0.448 | -0.554 | -0.892 | 2.170 | 0.535 | P < 0.001 | |
|
| ||||||||
| CHUB | HC | 82 | 0.148 | 0.068 | -0.553 | 2.537 | 0.488 | U = 230 |
| LC | 29 | -0.420 | -0.487 | -0.783 | 0.835 | 0.320 | P < 0.001 | |
|
| ||||||||
| ROACH | HC | 90 | 0.242 | -0.105 | -0.738 | 5.669 | 1.075 | U = 187 |
| LC | 32 | -0.680 | -0.721 | -1.002 | -0.005 | 0.197 | P < 0.001 | |
|
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| PREDATOR | HC | 160 | 0.154 | 0.055 | -1.592 | 3.190 | 0.687 | U = 1192 |
| LC | 48 | -0.512 | -0.506 | -1.658 | 2.170 | 0.542 | P < 0.001 | |
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| NO PREDATOR | HC | 313 | 0.217 | 0.028 | -0.963 | 5.669 | 0.812 | U = 3931 |
| LC | 115 | -0.590 | -0.581 | -1.959 | 1.189 | 0.409 | P < 0.001 | |