Acute toxicity of polybrominated diphenyl ethers (PBDEs) for turbot (Psetta maxima) early life stages (ELS)
| Autor: | José Fumega, Moncef Boumaiza, Ricardo Beiras, Lazhar Mhadhbi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Embryo
Nonmammalian Polybromodiphenyl ethers (PBDE) Health Toxicology and Mutagenesis Polybrominated Biphenyls Embryonic Development Aquaculture Ecotoxicology Risk Assessment Lethal Dose 50 Random Allocation Brominated flame retardants (BFR) Early life stage (ELS) Polybrominated diphenyl ethers Flatfish Halogenated Diphenyl Ethers Toxicity Tests Acute Animals Environmental Chemistry Seawater Ecotoxicity Flame Retardants No-Observed-Adverse-Effect Level Dose-Response Relationship Drug biology Chemistry business.industry Turbot (Psetta maxima) General Medicine biology.organism_classification Pollution Acute toxicity Early life Turbot Teratogens Larva Environmental chemistry Flatfishes business Water Pollutants Chemical |
| Zdroj: | e-IEO: Repositorio Institucional Digital de Acceso Abierto del Instituto Español de Oceanografía Instituto Español de Oceanografía e-IEO. Repositorio Institucional Digital de Acceso Abierto del Instituto Español de Oceanografía instname |
| Popis: | Background, aim and scope The environmental presence of polybrominated diphenyl ethers (PBDEs), among which BDE-47 and BDE-99 are particularly abundant, makes toxicity data necessary to assess the hazard risk posed by PBDE to aquatic organisms. This study examines the effects of BDE-47 and BDE-99 on embryo-larval stages of the marine flatfish turbot. Materials and methods The turbot embryos were exposed at nominal concentrations of BDE-47 and BDE-99 for 6 days. Selected dose levels were relevant for investigating sublethal and lethal effects. Results Both tested compounds caused lethal toxicity as well as non-lethal malformations during embryo development. We found a high toxic potency of BDE-47 compared to BDE-99 (LC50 values for embryos and larvae, respectively, BDE-47: 27.35 and 14.13 μg L−1; BDE-99: 38.28 and 29.64 μg L−1). Discussion The present study shows high sensitivity of fish early life stages (ELS) to PBDE compounds. Based on environmental concentrations of dissolved PBDEs from various aquatic ecosystems, waterborne BDE-47 and BDE- 99 pose little risk of acute toxicity to marine fish at relevant environmental concentrations. Conclusions Turbot fish ELS proved to be an excellent model for the study of ecotoxicity of contaminants in seawater. The results demonstrate harmful effects of PBDE on turbot ELS at concentrations in the range of parts per billion units. Recommendations and perspectives In the perspective of risk assessment, ELS endpoints provide rapid, costeffective and ecologically relevant information, and links should be sought between these short-term tests and effects of long-term exposures in more realistic scenarios. MAE-PCI CTM2009-10908 Versión del editor 2,6510 |
| Databáze: | OpenAIRE |
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