Abstract
KNOWLEDGE of radioactivity in fish is largely limited to determinations made of the strontium-90 occurring in certain ocean species and to some attempts at the evaluation of caesium-137 content (137Cs) of the same or similar specimens. Häsänen and Miettinen1 found concentrations of the order of nanocuries of caesium-137 per kilogram (nc./kg) in freshwater fish. These were taken from lakes in Finland during 1962 and 1963 in the course of an investigation into sources of caesium-137 other than caribou and reindeer meat in the Laplander's diet. This finding could have been predicted from the earlier work of Pendleton and Hanson2, which demonstrated the rapid accumulation of caesium-137 by various aquatic forms through several trophic levels in a freshwater pond contaminated with caesium-137. Caesium-137 in these organisms was found to reach concentrations several orders of magnitude greater than those found in the surrounding water.
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References
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GUSTAFSON, P., BRAR, S. & MUNIAK, S. Caesium-137 in Edible Freshwater Fish. Nature 211, 843–844 (1966). https://doi.org/10.1038/211843a0
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DOI: https://doi.org/10.1038/211843a0
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