Preliminary Assessment of Legacy and Current-Use Pesticides in Franciscana Dolphins from Argentina
The change towards intensive agriculture has led to an increase in the use of pesticides. In addition, legacy pesticides, such as organochlorines are still present in the environment. Ten Franciscana dolphins were accidentally killed by netting in a coastal area of Argentina in Buenos Aires province...
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Veröffentlicht in: | Bulletin of environmental contamination and toxicology 2018-07, Vol.101 (1), p.14-19 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The change towards intensive agriculture has led to an increase in the use of pesticides. In addition, legacy pesticides, such as organochlorines are still present in the environment. Ten Franciscana dolphins were accidentally killed by netting in a coastal area of Argentina in Buenos Aires province. From these animals, organochlorine, organophosphate and pyrethroid pesticides were analyzed in liver, bubbler and melon tissues. The concentrations of Σendosulfan ranged from not detectable values (nd) to 3539 ng g
−1
lw, with the maximum level in melon tissue. DDE was present in 60% of all samples at concentrations from nd to 6672 ng g
−1
lw, indicating historical DDT contamination. The presence of endosulfan and heptachlor in a nursling calf indicated a transfer of these pesticides through lactational and placental transport. The concentrations of organophosphates and pyrethroids were below the limit of detection, reflecting the low persistence of these compounds. |
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ISSN: | 0007-4861 1432-0800 |
DOI: | 10.1007/s00128-018-2352-2 |