210Po concentration in Perna perna mussels: looking for radiation effects
J M Godoy1, Monica S de Oliveira, Carlos Eduardo B de Almeida
1Instituto de Radioproteção e Dosimetria/Comissão Nacional de Energia Nuclear, Av. Salvador Allende s/n, CEP: 21780-160 Rio de Janeiro, RJ, Brazil. jmgodoy@ird.gov.br
Journal of Environmental Radioactivity
|November 6, 2007
Summary
Polonium-210 (210Po) levels in Perna perna mussels did not correlate with age or weight. The low radiation dose received by the mussels showed no observable effects on DNA integrity.
Area of Science:
- Marine Biology
- Environmental Science
- Radiochemistry
Background:
- Perna perna mussels are important filter feeders in coastal ecosystems.
- Understanding radionuclide accumulation in marine bivalves is crucial for environmental monitoring.
- Polonium-210 (210Po) is a naturally occurring radionuclide with potential bioaccumulation in marine organisms.
Purpose of the Study:
- To assess the concentration of 210Po in Perna perna mussels.
- To investigate the correlation between 210Po levels, mussel age, and weight.
- To evaluate the potential impact of radiation dose on mussel DNA integrity.
Main Methods:
- Monthly sampling of Perna perna mussels from floating structures over one year.
- Measurement of mussel shell sizes and determination of 210Po/210Pb concentrations in haemolymph.
- Analysis of micronuclei frequency and DNA breaks to assess radiation damage.
Main Results:
- A mean 210Po concentration of 155 Bq kg(-1) wet weight was determined.
- No significant correlation was found between 210Po concentration and mussel age or weight.
- The low radiation dose rate (0.02 mGy d(-1)) did not cause observable DNA damage.
Conclusions:
- Perna perna mussels accumulate 210Po, with levels comparable to literature values.
- Mussel age and weight are not reliable predictors of 210Po concentration in this study.
- The assessed radiation dose is below levels likely to induce genotoxicity in Perna perna mussels.
