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Temporal changes in radionuclide transfer to biota in Canadian Shield lakes receiving chronic inputs: Reconstruction of radionuclide exposure to non-human biota in Perch Lake over a 40 year period

Published online by Cambridge University Press:  17 June 2005

J.C. Barescut ,
J.C. Gariel ,
J.M. Péres ,
T. L. Yankovich  and
R. J.J. Cornett
T. L. Yankovich
Affiliation:
Atomic Energy of Canada Limited, Environmental Technologies Branch, Stn. 51A, Chalk River Laboratories, Chalk River, Ontario, Canada
R. J.J. Cornett
Affiliation:
Radiation Protection Bureau, 775 Brookfield Road, Health Canada, Ottawa, Ontario, Canada
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Abstract


Temporal changes in radionuclide transfer factors were evaluated in forage fishes over a 40- to 50-year period. In general, 90Sr, 60Co and 137Cs transfer factors fairly consistent over time, as indicated by strong correlations between measured and estimated values. This conclusion was further strengthened by comparing radionuclide transfer factors measured in Perch Lake biota relative to those reported for other Canadian Shield lakes, since similar values were found. Despite these similarities, however, within-lake differences of up to an order of magnitude were observed for a given species collected in a given year, suggesting that within lakes, there may be factors influencing biota exposure to radionuclides and/or bioavailability. 


Type
Research Article
Information
Radioprotection , Volume 40 , Issue S1 , May 2005 , pp. S485 - S490
Copyright
© EDP Sciences, 2005

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