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High accumulation of perfluorooctane sulfonate (PFOS) in marine tucuxi dolphins (Sotalia guianensis) from the Brazilian coast Dorneles, P.R.; Lailson-Brito, J.; Azevedo, A.F.; Meyer, J.; Vidal, L.G.; Fragoso, A.B.; Torres, J.P.; Malm, O.; Blust, R.; Das, K. (2008). High accumulation of perfluorooctane sulfonate (PFOS) in marine tucuxi dolphins (Sotalia guianensis) from the Brazilian coast. Environ. Sci. Technol. 42(14): 5368-5373. http://dx.doi.org/10.1021/es800702k In: Environmental Science and Technology. American Chemical Society: Easton. ISSN 0013-936X; e-ISSN 1520-5851

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Beschikbaar in	Auteurs
VLIZ: Open Marine Archive 141552 [ download pdf ]

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Trefwoorden

Aquatic organisms > Marine organisms > Aquatic mammals > Marine mammals Biological phenomena > Accumulation > Bioaccumulation Chemical compounds > Organic compounds Properties > Biological properties > Toxicity Secretory organs > Glands > Exocrine glands > Digestive system > Digestive glands > Liver Water pollution effects Mammalia [WoRMS]; Sotalia guianensis (Van Beneden, 1864) [WoRMS] ASW, Brazil, Rio de Janeiro, Guanabara Bay [Marine Regions] Marien/Kust

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Auteurs		Top
Dorneles, P.R. Lailson-Brito, J. Azevedo, A.F. Meyer, J.	Vidal, L.G. Fragoso, A.B. Torres, J.P.	Malm, O. Blust, R. Das, K.

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Abstract

Perfluorooctane sulfonate (PFOS) and other perfluoroalkyl compounds (PFCs) were measured in liver samples from 29 marine tucuxi dolphins from Rio de Janeiro state (RJ), Brazil. PFC measurement combined liquid chromatography and mass spectrometry, using a CapLC system connected to a Quadrupole-LIT mass spectrometer. PFOS was the only PFC detected and it was so in all samples. PFOS concentrations (ng x g(-1) dw) of dolphins (n=23) from the highly contaminated Guanabara Bay (in RJ) varied between 43 and 2431 as well as between 76 and 427 from areas of RJ other than the quoted bay (n=6). Concentrations of three fetuses and one neonate varied between 664 and 1590. Fetus/mother ratios were calculated in two situations (2.75 and 2.62). It seems that mother-to-calf transference plays important role for relationships between PFOS and age. When a one-year-old male calf presenting 2431 ng x g(-1) dw was excluded from the test, significant correlations were observed between PFOS concentrations and both age and total length. Despite the placental transference, PFOS concentrations were not significantly lower in females than in males. PFOS levels in marine tucuxi dolphins from Guanabara Bay are among the highest detected to date in cetaceans, and this may represent a threat to the small population concerned.

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