Document Detail

Exposure of brown trout (Salmo trutta L.) to tunnel wash water runoff--chemical characterisation and biological impact.
MedLine Citation:
PMID:  20381128     Owner:  NLM     Status:  MEDLINE    
Washing and cleaning of road tunnels are a routinely performed maintenance task, which generate significant amount of polluted wash-water runoff that normally is discharged to the nearest recipient. The present study was designed to quantify chemical contaminants (trace metals, hydrocarbons, PAH and detergents) in such wash water and assess the short term impact on brown trout (Salmo trutta L.) based on in situ experiments. Selected endpoints were accumulation of trace metals in gills, haematological variables and hepatic mRNA transcription of five biomarkers reflecting defence against free radicals, trace metals, planar aromatic hydrocarbons and endocrine disruptions which were measured prior (-3h), during (1 and 3h) and after the tunnel wash (14, 38 and 86h). Our findings showed that the runoff water was highly polluted, but most of the contaminants were associated with particles which are normally considered biologically inert. In addition, high concentrations of calcium and dissolved organic carbon were identified in the wash water, thus reducing metal toxicity. However, compared to the control fish, a rapid accumulation of trace metals in gills was observed. This was immediately followed by a modest change in blood ions and glucose in exposed fish shortly after the exposure start. However, after 38-86h post wash, gill metal concentrations, plasma ions and glucose levels recovered back to control levels. In contrast, the mRNA transcription of the CYP1A and the oxidative stress related biomarkers TRX and GCS did not increase until 14h after the exposure start and this increase was still apparent when the experiment was terminated 86h after the beginning of the tunnel wash. The triggering of the defence systems seemed to have successfully restored homeostasis of the physiological variables measured, but the fish still used energy for detoxification four days after the episode, measured as increased biomarker synthesis.
Sondre Meland; Lene S?rlie Heier; Brit Salbu; Knut Erik Tollefsen; Eivind Farmen; Bj?rn Olav Rosseland
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-04-09
Journal Detail:
Title:  The Science of the total environment     Volume:  408     ISSN:  1879-1026     ISO Abbreviation:  Sci. Total Environ.     Publication Date:  2010 Jun 
Date Detail:
Created Date:  2010-05-05     Completed Date:  2010-06-17     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0330500     Medline TA:  Sci Total Environ     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  2646-56     Citation Subset:  IM    
Copyright Information:
Copyright (c) 2010 Elsevier B.V. All rights reserved.
Department of Plant and Environmental Sciences, Norwegian University of Life Sciences, As, Norway.
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MeSH Terms
Detergents / analysis,  metabolism,  toxicity
Environmental Monitoring
Gills / drug effects,  metabolism
Liver / drug effects,  metabolism
Metals / analysis,  metabolism,  toxicity
Polycyclic Hydrocarbons, Aromatic / analysis,  metabolism,  toxicity
Trout / metabolism*
Water Pollutants, Chemical / analysis,  metabolism,  toxicity*
Reg. No./Substance:
0/Detergents; 0/Metals; 0/Polycyclic Hydrocarbons, Aromatic; 0/Water Pollutants, Chemical

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