The derivation of radionuclide transfer parameters for and dose-rates to an adult ringed seal ( Phoca hispida) in an Arctic environment

Radionuclide transfer parameters and dose-rates for an adult ringed seal from Svalbard have been determined based on empirical and estimated tissue activity concentrations and detailed dietary and habitat information. Whole-body equivalent concentration factors determined for anthropogenic radionucl...

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Bibliographic Details
Published in:Journal of environmental radioactivity 2006, Vol.90 (3), p.197-209
Main Authors: Gwynn, J.P., Brown, J.E., Kovacs, K.M., Lydersen, C.
Format: Article
Language:English
Subjects:
Animal, plant and microbial ecology
Animals
Applied ecology
Arctic
Biological and medical sciences
Biological half-life
Bone and Bones - chemistry
Concentration factor
Dose-rate
Ecotoxicology, biological effects of pollution
Effects of pollution and side effects of pesticides on vertebrates
Fundamental and applied biological sciences. Psychology
Half-Life
Ice Cover - chemistry
Kidney - chemistry
Liver - chemistry
Mammalia
Marine
Models, Biological
Muscles - chemistry
Phoca - metabolism
Phoca hispida
Radiation Dosage
Radioisotopes - analysis
Radioisotopes - metabolism
Ringed seal
Seawater - chemistry
Svalbard
Transfer parameters
Water Pollutants, Radioactive - analysis
Water Pollutants, Radioactive - metabolism
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Summary:Radionuclide transfer parameters and dose-rates for an adult ringed seal from Svalbard have been determined based on empirical and estimated tissue activity concentrations and detailed dietary and habitat information. Whole-body equivalent concentration factors determined for anthropogenic radionuclides ranged from 10 1 ( 90Sr) to 10 2 ( 137Cs, 238Pu and 239,240Pu), while natural radionuclides ranged from 10 2 ( 210Pb) to 10 4 ( 210Po). Employing a dietary composition of 40% fish, 40% zooplankton and 20% benthic invertebrates, a whole-body biological half-life of 29 days was derived for 137Cs. A total dose-rate of approximately 0.19 μGy h −1 (1.7 mGy a −1) was derived for an adult ringed seal; this dose-rate is virtually entirely attributable to the internal components of 210Po and 40K. The dose-rates associated with the presence of anthropogenically derived radionuclides in the present assessment fall many orders of magnitude below the dose-rates at which any biological effects would be expected.
ISSN:0265-931X
1879-1700
DOI:10.1016/j.jenvrad.2006.07.002