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Age- and sex-dependent distribution of persistent organochlorine pollutants in urban foxes.(Research)
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The colonization of urban and suburban habitats by red foxes (Vulpes vulpes) provides a novel sentinel species to monitor the spread of anthropogenic pollutants in densely populated human settlements. Here, red foxes were collected in the municipal territory of Zurich, Switzerland, and their perirenal adipose tissue was examined for persistent organochlorine residues. This pilot study revealed an unexpected pattern of contamination by polychlorinated biphenyls (PCBs), with significantly higher levels of the predominant congeners PCB-138, PCB-153, and PCB-180 in juvenile foxes ...
<0.005 0.006
Dieldrin 0.154 0.017 0.141
DDT 4.361 0.016 0.077
Endosulfan 0.027 0.010 0.026
Hexachlorobenzene 0.033 0.006 0.008
heptachlor epoxide 0.013 0.082 0.008
Mean(a) (mg/kg)
J Y A
[sigma]PCB (138, 153, 180) 0.235 0.186 0.146
PCB-28 0.006 0.005 NA(b)
PCB-101 0.013 NA(b) 0.006
Dieldrin 0.024 0.082 0.022
DDT 0.115 0.007 0.015
Endosulfan 0.010 0.007 0.012
Hexachlorobenzene 0.007 0.005 0.006
heptachlor epoxide 0.007 0.017 0.007
Abbreviations: A, adult (>
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