Document Detail

Chronic exposure to coal fly ash causes minimal changes in corticosterone and testosterone concentrations in male southern toads Bufo terrestris.
MedLine Citation:
PMID:  16783624     Owner:  NLM     Status:  MEDLINE    
More than 50% of the electricity in the United States is produced by coal-burning power plants. The byproduct of coal-burning plants is coal fly ash, which contains increased concentrations of trace metals and is disposed of in collection basins. Southern toads (Bufo terrestris) frequently use these basins for reproduction. Male toads were collected in spring 2001 and 2002 from an ash basin and a reference site and divided into four groups: toads collected at the control site and maintained on (1) control substrate and food or (2) ash and contaminated food and toads collected at the ash site and maintained in (3) control or (4) ash conditions. Blood was collected periodically during 5 months to determine testosterone and corticosterone concentrations. Reference to ash toads exhibited a significant, transient increase in corticosterone at 4 weeks, but neither corticosterone nor testosterone continued to increase beyond this time. In contrast, toads caught and maintained on ash did not exhibit increased corticosterone. Testosterone in these toads appeared to be unrelated to ash exposure. This unexpected lack of a corticosterone response and no effect on testosterone suggests that toads chronically exposed to trace metals can acclimate to a polluted environment, but they may still experience subtle long-term consequences.
C K Ward; M T Mendonça
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2006-06-01
Journal Detail:
Title:  Archives of environmental contamination and toxicology     Volume:  51     ISSN:  0090-4341     ISO Abbreviation:  Arch. Environ. Contam. Toxicol.     Publication Date:  2006 Aug 
Date Detail:
Created Date:  2006-06-19     Completed Date:  2006-09-08     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0357245     Medline TA:  Arch Environ Contam Toxicol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  263-9     Citation Subset:  IM    
Department of Biology, Auburn University Montgomery, P. O. Box 244023, Alabama 36124-4023, USA.
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MeSH Terms
Bufonidae / blood*
Carbon / toxicity*
Corticosterone / blood*
Environmental Pollutants / analysis
Industrial Waste
Metals / analysis
Particulate Matter
Testosterone / blood*
Reg. No./Substance:
0/Coal; 0/Environmental Pollutants; 0/Industrial Waste; 0/Metals; 0/Particulate Matter; 50-22-6/Corticosterone; 58-22-0/Testosterone; 68131-74-8/fly ash; 7440-44-0/Carbon

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

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