Toxicity of dispersed weathered crude oil to early life stages of Atlantic herring (Clupea harengus)
| Autor: | Stephen McIntosh, Thomas King, Dongmei Wu, Peter V. Hodson |
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| Rok vydání: | 2010 |
| Předmět: |
Atlantic herring
Embryo Nonmammalian Time Factors biology Health Toxicology and Mutagenesis Fishes Aquatic animal Clupea biology.organism_classification Toxicology Germ Cells Petroleum Animal science Water column Human fertilization Toxicity Animals Environmental Chemistry Chronic toxicity Corexit Water Pollutants Chemical |
| Zdroj: | Environmental Toxicology and Chemistry. |
| ISSN: | 1552-8618 0730-7268 |
| DOI: | 10.1002/etc.134 |
| Popis: | Reports of the chronic toxicity of dispersed crude oil to early life stages of fish perpetuate uncertainty about dispersant use. However, realistic exposures to dispersed oil in the water column are thought to be much briefer than exposures associated with chronic toxicity testing. To address this issue, the toxicity of dispersed weathered oil to early life stages of Atlantic herring (Clupea harengus) was tested for short exposure durations, ranging from 1 to 144 h. Toxicity was a function of concentration and duration of exposure, as well as of the life stage exposed. Medium South American crude oil dispersed with Corexit 9500 caused blue sac disease in embryos, but not in free-swimming embryos. The age of embryos was negatively correlated with their sensitivity to oil; those freshly fertilized were most sensitive. Sensitivity increased after hatch, with free-swimming embryos showing signs of narcosis. Gametes were also tested; dispersed oil dramatically impaired fertilization success. For exposures of less than 24 h, gametes and free-swimming embryos were the most sensitive life stages. For those of more than 24 h, young embryos ( |
| Databáze: | OpenAIRE |
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