Table 4.
Liver concentration (μgg-1) 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 | N | Mean | Median | Minimum | Maximum | Std.Dev. | Mann-Whitney U test |
|---|---|---|---|---|---|---|---|---|
| PERCH | HC | 71 | 0.225 | 0.113 | -0.973 | 2.028 | 0.549 | U = 166 |
| LC | 32 | -0.500 | -0.440 | -0.899 | -0.075 | 0.210 | P < 0.001 | |
|
| ||||||||
| CHUB | HC | 82 | 0.182 | -0.059 | -0.546 | 3.950 | 0.794 | U = 158 |
| LC | 29 | -0.515 | -0.523 | -0.764 | -0.209 | 0.168 | P < 0.001 | |
|
| ||||||||
| ROACH | HC | 91 | 0.123 | -0.037 | -0.323 | 2.669 | 0.473 | U = 46 |
| LC | 32 | -0.349 | -0.341 | -0.473 | -0.239 | 0.062 | P < 0.001 | |
|
| ||||||||
| PREDATOR | HC | 160 | 0.170 | 0.063 | -1.283 | 3.379 | 0.679 | U = 830 |
| LC | 48 | -0.566 | -0.453 | -1.846 | -0.075 | 0.295 | P < 0.001 | |
|
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| NO PREDATOR | HC | 314 | 0.158 | -0.031 | -0.684 | 3.950 | 0.605 | U = 2939 |
| LC | 115 | -0.431 | -0.369 | -1.278 | 0.015 | 0.222 | P < 0.001 | |