Effects of post-Hurricane Katrina New Orleans (LA, USA) sediments on early development of the Japanese medaka (Oryzias latipes).
Environ Toxicol Chem
; 27(12): 2557-64, 2008 Dec.
Article
en En
| MEDLINE
| ID: mdl-18620474
ABSTRACT
When Hurricane Katrina struck the U.S. Gulf Coast, levees surrounding New Orleans, Louisiana, USA, were breached, leading to widespread flooding of the city and potential contamination from industrial spills, residential sources, and redistribution of pre-existing pollutants. We chemically characterized sediment samples from five New Orleans locations and used early development and mutagenesis in Japanese medaka (Oryzias latipes) as metrics of the toxic effects of these sediments. Sediment samples were analyzed for organohalogen pesticides, polycyclic aromatic hydrocarbons, polychlorinated biphenyls, and metals. One month after Hurricane Katrina, four of the five sites had unsafe concentrations of arsenic and one or more pesticides, pesticide metabolites, or polycyclic aromatic hydrocarbons. Medaka embryonic mortality and time to hatching both increased during exposure to aqueous extracts of sediments, with the greatest toxicity observed for the most heavily contaminated sediment. Exposure to sediment extracts did not, however, result in significantly elevated rates of mutagenesis. When the most contaminated site was resampled 4.5 months later, the sediment had lower contaminant concentrations and fewer deleterious effects on medaka development. Using the medaka bioassay, therefore, we demonstrate toxic effects of post-Hurricane Katrina sediments immediately following the storm, with some amelioration over time of contaminant concentrations and their negative biological effects.
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Contaminantes del Suelo
/
Contaminantes Químicos del Agua
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Oryzias
/
Sedimentos Geológicos
/
Tormentas Ciclónicas
Límite:
Animals
País/Región como asunto:
America do norte
Idioma:
En
Revista:
Environ Toxicol Chem
Año:
2008
Tipo del documento:
Article
País de afiliación:
Estados Unidos