Data/hora: 10/06/2024 15:08:23

Provedor de dados: | 17
País: | United Kingdom
Título: | Acute Toxicity of Perfluorooctane Sulfonic Acid on Early Life Stages of Daphnia Magna, Siriella Armata, Paracentrotus Lividus Sea Urchin, and Turbot (Scophthalmus Maximus L.).
Autores: | Lazhar Mhadhbi; Sara P&amp;#xe9;rez Fernandez; Diego Real Conde; Moncef Boumaiza; Ricardo Beiras.
Data: | 2010-07-12
Ano: | 2010
Palavras-chave: | Biotechnology; Chemistry; Ecology; Earth &amp; Environment.
Resumo: | Perfluorooctane sulfonate (PFOS) is a persistent organic pollutant whose potential toxicity is causing great concern. In the present study, we used two crustaceans (_Daphnia magna_, _Siriella armata_), echinoid embryos (_Paracentrotus lividus_) and turbot (_Scophthalmus maximus L._) embryos and larvae to investigate the acute toxicity of this compound. The marine species _S. armata_ exhibited greater sensitivity than the freshwater species _D. magna_. In the 48-h acute toxicity test the median lethal concentration was 10.96 mg/L for _S. armata_ and 87.46 mg/L for _D. magna_. In the 96h toxicity test, turbot showed the lowest EC50 (0.155 mgL-1), whilst the EC50 for _S. armata_ was 7.92 mgL-1 which was approximately three times lower than that for sea urchin (24.12 mgL-1). The EC10 values were estimated as 0.032 mgL-1, 4.23 mgL-1 and 45.21 mgL-1 for turbot, Siriella and daphnia, respectively. The LOEC values were 75 &amp;#xb5;gL-1, 2.5 mgL-1 and 75 mgL-1 (p&amp;#x3c; 0.05) for turbot, daphnia, and Siriella, respectively. The NOEC values were estimated at 37.5 &amp;#xb5;gL-1, 1.25 mgL-1 and 50 mgL-1 (p&amp;#x3c; 0.05) for turbot, Siriella and daphnia, respectively. The order of acute toxicity was: turbot &amp;#x3e; _S. armata_ &amp;#x3e; sea urchin &amp;#x3e; _Daphnia magna_. This result highlights the importance of including a marine fish in the battery of species to describe the toxicity of these compounds. Considering the persistent nature of PFOS, more research is required to determine potential consequences of long-term exposure to these compounds in aquatic ecosystems.
Tipo: | Poster

Identificador:

http://precedings.nature.com/documents/4657/version/1

oai:nature.com:10.1038/npre.2010.4657.1

http://dx.doi.org/10.1038/npre.2010.4657.1

Fonte: | Nature Precedings
Fonte: | Creative Commons Attribution 3.0 License