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We collected blubber samples from bottlenose dolphins stranded on Spain’s Mediterranean coasts over a 25-year period (1978–2002). Samples were analyzed to determine time trends in levels of: HCB (hexachlorobenzene), PCB (polychlorinated biphenyls) and tDDT (dichlorodiphenyltrichloroethane and its metabolites). Overall, levels were high relative to other areas. This reflects both the ubiquity of organochlorine...
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