Document Detail

Accumulation of cadmium in a freshwater food chain experimental model.
MedLine Citation:
PMID:  6851925     Owner:  NLM     Status:  MEDLINE    
The study of food chain contamination in nature or in the laboratory requires precise definitions of some terms. A simplified model of a freshwater food chain has been elaborated to try to point out hazards related to the presence of cadmium in the aquatic environment. Three different species belonging to various trophic levels, but to the same aquatic systems were used. The required biological and analytical criteria are described. The time course of the experiment was 34 days starting with a 10-day contamination of the first trophic level (algae). The algae were then separated, washed with fresh medium, and given to the second trophic level (daphnids) to eat for 20 days. The third trophic level (fish) was then introduced for 4 days as a scavenger. The methodology was designed to determine the accumulation of cadmium by daphnids and then fish from the algal source. The results show a high direct bioaccumulation of cadmium in algae. The indirect bioaccumulation of daphnids was of the same order of magnitude, but for fish it was smaller. Nevertheless the cadmium transfer from daphnids to fish was obvious.
J F Ferard; J M Jouany; R Truhaut; P Vasseur
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Ecotoxicology and environmental safety     Volume:  7     ISSN:  0147-6513     ISO Abbreviation:  Ecotoxicol. Environ. Saf.     Publication Date:  1983 Feb 
Date Detail:
Created Date:  1983-07-08     Completed Date:  1983-07-08     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  7805381     Medline TA:  Ecotoxicol Environ Saf     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  43-52     Citation Subset:  IM    
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MeSH Terms
Algae / metabolism
Cadmium / metabolism*
Chlorella / metabolism
Crustacea / metabolism
Daphnia / metabolism
Fishes / metabolism
Food Analysis
Models, Biological
Water Pollutants / metabolism*
Water Pollutants, Chemical / metabolism*
Reg. No./Substance:
0/Water Pollutants; 0/Water Pollutants, Chemical; 7440-43-9/Cadmium

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