Document Detail


Presence and implications of chemical contaminants in the freshwaters of the Canadian Arctic.
MedLine Citation:
PMID:  1514104     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Hydrocarbons, stable organochlorines, metals and radionuclides are widespread in the freshwaters of the Canadian Arctic. Petroleum-associated hydrocarbon sources include natural seepage, wastes and effluents from exploration, production and refining at Norman Wells and spills. Hydrocarbons also originate from combustion of carbon-based fuels, generally at lower latitudes and then reach the Arctic with air movements. Organochlorine compounds also move throughout the hemisphere by aerial pathways and have become distributed widely in Arctic fish. The organochlorine at highest concentration in Arctic freshwater is alpha-HCH, while those generally at highest concentrations in the fish are toxaphene, PCBs and chlordane. Metals are ubiquitous in Arctic freshwaters, with inputs of several metals by precipitation superimposed on natural geologic backgrounds. Mercury is found in muscle of fish from Arctic freshwaters at concentrations up to about 0.5 ppm. Radionuclides are also widespread at levels below those acceptable in food, with some local elevations near former mines. The implications of these contaminants for the northern ecosystems and the people dependent upon them are still not clear. Preliminary studies of inducible enzymes in fish suggest that the thresholds for biological damage have not been reached.
Authors:
W L Lockhart; R Wagemann; B Tracey; D Sutherland; D J Thomas
Related Documents :
16909574 - Conservation benefits of temperate marine protected areas: variation among fish species.
11449824 - Application of the principal component analysis (pca) to the ecological study of an art...
15913664 - Survivorship of coral juveniles in a fish farm environment.
11079394 - The relationship between the position of the retinal area centralis and feeding behavio...
3060234 - Yeast flocculation: factors affecting the measurement of flocculence.
12010164 - Food selection and perceptions of chewing ability following provision of implant and co...
Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  The Science of the total environment     Volume:  122     ISSN:  0048-9697     ISO Abbreviation:  Sci. Total Environ.     Publication Date:  1992 Jul 
Date Detail:
Created Date:  1992-09-28     Completed Date:  1992-09-28     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0330500     Medline TA:  Sci Total Environ     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  165-245     Citation Subset:  IM    
Affiliation:
Department of Fisheries and Oceans, Freshwater Institute, Winnipeg, Manitoba, Canada.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Animals
Arctic Regions
Birds / metabolism
Canada
Fishes / metabolism
Fresh Water / chemistry*
Humans
Hydrocarbons / analysis*,  toxicity
Hydrocarbons, Chlorinated / analysis*,  toxicity
Mammals / metabolism
Metals / analysis*,  toxicity
Mining
Petroleum
Radioactive Pollutants / analysis*,  toxicity
Water Pollutants, Chemical / analysis,  toxicity
Chemical
Reg. No./Substance:
0/Hydrocarbons; 0/Hydrocarbons, Chlorinated; 0/Metals; 0/Petroleum; 0/Radioactive Pollutants; 0/Water Pollutants, Chemical

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


Previous Document:  Arctic contaminants: sources, occurrence and pathways.
Next Document:  Inuit foods and diet: a preliminary assessment of benefits and risks.