| Life cycle responses of the midge Chironomus riparius to polycyclic aromatic compound exposure. | |
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MedLine Citation:
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PMID: 17644226 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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During acute exposure, polycyclic aromatic compounds (PACs) act mainly by narcosis, but during chronic exposure the same compounds may exert sublethal life cycle effects. The aim of this study was therefore to evaluate the chronic effects of sediment spiked PACs on the emergence of the midge Chironomus riparius. Three isomer pairs were selected, and 28-day LC50 values and 50% emergence times (EMt50) were determined. Concentration-response relationships were observed for phenanthrene, acridine, phenanthridine and acridone. Anthracene and phenanthridone had no effect on total emergence, but did cause a delay in emergence. Calculated porewater LC50 values correlated well with logKow values, suggesting narcosis as mode of action. In contrast, effect concentrations for delay in emergence (EMt50) deviated from narcosis, suggesting a specific mode of action during chronic exposure. It is concluded that emergence is a powerful endpoint to detect life cycle effects of PACs on a key sediment inhabiting invertebrate. |
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Authors:
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Miriam León Paumen; Eefje Borgman; Michiel H S Kraak; Cornelis A M van Gestel; Wim Admiraal |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2007-07-17 |
Journal Detail:
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Title: Environmental pollution (Barking, Essex : 1987) Volume: 152 ISSN: 0269-7491 ISO Abbreviation: Environ. Pollut. Publication Date: 2008 Mar |
Date Detail:
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Created Date: 2008-03-03 Completed Date: 2008-06-17 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8804476 Medline TA: Environ Pollut Country: England |
Other Details:
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Languages: eng Pagination: 225-32 Citation Subset: IM |
Affiliation:
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Department of Aquatic Ecology and Ecotoxicology, Institute of Biodiversity and Ecosystem Dynamics, University of Amsterdam, Kruislaan 320, 1098 SM Amsterdam, the Netherlands. mleon@science.uva.nl |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Chironomidae / drug effects, growth & development* Environmental Monitoring / methods Geologic Sediments Larva Life Cycle Stages Polycyclic Hydrocarbons, Aromatic / toxicity* Soil Pollutants / toxicity* Toxicity Tests, Chronic |
| Chemical | |
Reg. No./Substance:
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0/Polycyclic Hydrocarbons, Aromatic; 0/Soil Pollutants |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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