Uptake and elimination of radiocaesium in fish and the “size effect”

Uptake and elimination of radiocaesium in fish and the “size effect”

A number of hypotheses have previously been developed concerning the rates of uptake and elimination of radiocaesium ( 137Cs) in fish. These include the influence of potassium and other water chemical parameters on both uptake and elimination, and the effect of fish size on accumulation. In order to...

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Bibliographic Details
Published in:Journal of environmental radioactivity Vol. 62; no. 2; pp. 145 - 164
Main Authors: Smith, J.T, Kudelsky, A.V, Ryabov, I.N, Daire, S.E, Boyer, L, Blust, R.J, Fernandez, J.A, Hadderingh, R.H, Voitsekhovitch, O.V
Format: Journal Article
Language:English
Published: England Elsevier Ltd 2002
Subjects:
Animals
Aquatic
Cesium Radioisotopes - analysis
Cesium Radioisotopes - pharmacokinetics
Chernobyl
Esocidae - metabolism
Esox lucius
Europe
Fish
Fishes - metabolism
Fresh Water
Freshwater
Ions
Models, Biological
Perca
Perches - metabolism
Potassium - pharmacology
Radioactive Hazard Release
Radiocaesium
Salmo trutta
Trout - metabolism
Water Pollutants, Radioactive - analysis
Water Pollutants, Radioactive - pharmacokinetics
Europe
Finland, Iso Valkjaervi L
Model
Chernobyl
Fish
Aquatic
Radiocaesium
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Summary:A number of hypotheses have previously been developed concerning the rates of uptake and elimination of radiocaesium ( 137Cs) in fish. These include the influence of potassium and other water chemical parameters on both uptake and elimination, and the effect of fish size on accumulation. In order to test these hypotheses, we have assembled a data set comprising more than 1000 measurements of radiocaesium ( 137Cs) in predatory fish (perch, pike and brown trout) in nine European lakes during the years after Chernobyl. These data have been analysed using simple models for uptake and excretion of 137Cs in fish, showing that: 1. Fish–water concentration factors ( CF) were inversely proportional to potassium [K +] concentration of the different lakes, in agreement with previous studies. 2. The uptake rate of 137Cs in fish was negatively correlated with lake [K +], but excretion rate was independent of [K +]. 3. Lower than expected CF values were found in one lake, Iso Valkjärvi, Finland. This is attributed to inhibition of the K + (and therefore 137Cs) high affinity transport system in aquatic plants and fish by low pH and/or low Ca 2+. 4. The inclusion of fish weight as a parameter in our dynamic model significantly improves the ability of the model to fit the observed measurements of 137Cs. 5. The model developed from the above hypotheses was able to fit the data from nine different lakes to within approximately a factor of 3 of the observed values.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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content type line 23
ISSN:0265-931X
1879-1700
DOI:10.1016/S0265-931X(01)00157-6