Anthropogenic and naturally-produced organobrominated compounds in bluefin tuna from the Mediterranean Sea |
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Authors: | Miren Pena-Abaurrea Liesbeth Weijs Lourdes Ramos Nicoletta Borghesi Simonetta Corsolini Hugo Neels Ronny Blust Adrian Covaci |
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Institution: | aState Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;bFisheries and Illinois Aquaculture Center and Department of Zoology, 171 Life Science II, Southern Illinois University, Carbondale, Illinois 62901, USA |
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Abstract: | In the present study, bioaccumulation potential of two pyrethroid insecticides, bifenthrin and permethrin, was measured using a Lumbriculus variegatus sediment bioaccumulation test. Two sediments differing in their physical characteristics and two different aging periods were tested. Desorption rates measured by Tenax extraction suggested that pyrethroids were bioavailable to L. variegatus, however bioavailability varied among chemicals, sediments and aging time, and was greater for permethrin than bifenthrin. The relatively low biota-sediment accumulation factor (BSAF) values resulted from the extensive biotransformation of pyrethroids by L. variegatus. Biotransformation capacity of L. variegatus to permethrin was further studied with a water-only exposure, and the percentage parent compound dropped to 36.0% after 14 d. These results indicated sediment-associated pyrethroids were bioavailable to L. variegatus, however bioaccumulation was limited because L. variegatus was capable of biotransforming the pyrethroids. |
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Keywords: | Pyrethroid insecticides Sediment toxicity Bifenthrin Permethrin Tenax extraction |
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