Document Detail


Time to death response in carabid beetles exposed to multiple stressors along a gradient of heavy metal pollution.
MedLine Citation:
PMID:  11383341     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
We investigated the responses of invertebrates inhabiting polluted environments to multiple stressors. Carabid beetles (Pterostichus oblongopunctatus F.) were subjected to food deprivation and insecticide treatment (dimethoate) to resolve trends associated with a gradient of heavy metal pollution. Metal concentrations along the gradient of five sites ranged from approximately 150 to 10,500 mg/kg Zn, 136 to 2600 mg/kg Pb, and 0.84 to 81.9 mg/kg Cd. There was no difference in body mass along the pollution gradient. However, the beetles originating from the most contaminated sites were significantly less tolerant to food deprivation than beetles from the reference site. Median survival time was 120 h for the two most polluted sites, compared with 168 h at the reference site. Beetles from the two most polluted sites were also significantly more susceptible to dimethoate at 0.1 microgram active ingredient/beetle. Median survival times were 12 and 123 h for beetles from the two most polluted sites and 359 h for the reference site. Carabid beetles exposed to chronic pollution, therefore, exhibit elevated susceptibility to additional stressors.
Authors:
D Stone; P Jepson; P Kramarz; R Laskowski
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Environmental pollution (Barking, Essex : 1987)     Volume:  113     ISSN:  0269-7491     ISO Abbreviation:  Environ. Pollut.     Publication Date:  2001  
Date Detail:
Created Date:  2001-05-31     Completed Date:  2001-06-14     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8804476     Medline TA:  Environ Pollut     Country:  England    
Other Details:
Languages:  eng     Pagination:  239-44     Citation Subset:  IM    
Affiliation:
Department of Environmental and Molecular Toxicology, Oregon State University, 1007 ALS, Corvallis, OR 97331-2907, USA.
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MeSH Terms
Descriptor/Qualifier:
Adaptation, Physiological
Animals
Beetles / physiology*
Dose-Response Relationship, Drug
Food Deprivation
Lethal Dose 50
Metals, Heavy / toxicity*
Mortality
Survival Analysis
Time Factors
Water Pollutants, Chemical / toxicity*
Chemical
Reg. No./Substance:
0/Metals, Heavy; 0/Water Pollutants, Chemical

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


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