Document Detail

Growth and energy storage in juvenile fathead minnows exposed to metal mine waste water in simulated winter and summer conditions.
MedLine Citation:
PMID:  20413157     Owner:  NLM     Status:  MEDLINE    
Juvenile fathead minnows (Pimephales promelas) were exposed from 10 to 100 days post-hatch (dph) to metal mining effluent under simulated summer (20 degrees C and 16/8 light/dark) or winter (4 degrees C and 8/16 light/dark) conditions in order to test the winter stress syndrome hypothesis. The condition factor of fish at 100 dph was similar between seasons, and was greater in the summer effluent exposure group compared to the summer control. Whole body triglycerides were lower in the effluent exposure group compared to control under winter conditions, but not summer. Whole body burdens of several trace metals, notably Cu, Rb and Se, were greater in the effluent exposed fish at 100 dph and displayed seasonal differences in bioaccumulation. Fathead minnows were also exposed from 10 to 100 dph to graded concentrations of ammonia (0.02-0.40 mg unionized NH(3)/L) under summer conditions in order to investigate potential effects of this component of the effluent. There was no effect of ammonia exposure on growth parameters, but an increase in whole body triglycerides was observed at the highest exposure. The seasonal differences in bioaccumulation and biological responses suggest that winter conditions may be an important modifying factor in aquatic toxicological studies.
Kimberlea Driedger; Lynn P Weber; Carrie J Rickwood; Monique G Dubé; David M Janz
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-04-21
Journal Detail:
Title:  Ecotoxicology and environmental safety     Volume:  73     ISSN:  1090-2414     ISO Abbreviation:  Ecotoxicol. Environ. Saf.     Publication Date:  2010 Jul 
Date Detail:
Created Date:  2010-08-04     Completed Date:  2010-11-24     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7805381     Medline TA:  Ecotoxicol Environ Saf     Country:  United States    
Other Details:
Languages:  eng     Pagination:  727-34     Citation Subset:  IM    
Copyright Information:
Copyright (c) 2010 Elsevier Inc. All rights reserved.
Toxicology Centre, 44 Campus Drive, University of Saskatchewan, Saskatoon, SK, Canada.
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MeSH Terms
Ammonia / toxicity
Body Burden
Cyprinidae / physiology*
Energy Metabolism / drug effects*
Growth and Development / drug effects*
Metals / metabolism,  toxicity*
Waste Disposal, Fluid
Water Pollutants, Chemical / metabolism,  toxicity*
Reg. No./Substance:
0/Metals; 0/Water Pollutants, Chemical; 7664-41-7/Ammonia

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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