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  • Title: PCB and DDT levels do not appear to have enhanced the mortality of striped dolphins (Stenella coeruleoalba) in the 2007 Mediterranean epizootic.
    Author: Castrillon J, Gomez-Campos E, Aguilar A, Berdié L, Borrell A.
    Journal: Chemosphere; 2010 Sep; 81(4):459-63. PubMed ID: 20800263.
    Abstract:
    In 2007, 17 years after the first reported Mediterranean epizootic of striped dolphins (Stenella coeruleoalba), a new strain of the morbillivirus caused the deaths of dozens of striped dolphins that appeared dead on Western Mediterranean beaches. DDT and PCB levels were determined in these dolphins, and in individuals from sporadic strandings in the surrounding years. Comparison between the two epidemic events showed that organochlorine (OC) levels in the dolphins from 1990 epizootic were more than 10-fold higher for tPCB and 6-fold higher for tDDT than levels in dolphins from the 2007 outbreak. In contrast to what occurred in 1990, OCs from individuals affected by the second outburst fit well with curves of OC trends in the Mediterranean. Because the virulence of the 2007 epizootic was much lower, and the deceased dolphins affected by it did not present OC concentrations that were more elevated than in presumably healthy individuals, this second outburst is not believed to have been enhanced by OC pollutants.
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