Host: The Japan Radiation Research Society
Co-host: Asian Association for Radiation Research
137Cs, which is of great interest and importance as an indicator of radioactive pollution in marine environments, is one of the long-lived artificial radio-nuclides introduced by the atmospheric deposition of debris from nuclear explosions mainly before 1962. For the estimation of effects of the effluents from nuclear facilities, it is necessary to know the natural variations in the concentration of 137Cs and factors affecting variations in marine organisms.
We observed positive correlation between growth and 137Cs in 4 species among 14 major teleost species from fishing grounds along the coast of Japan. No increase in 137Cs concentration with increase of growth was observed in 2 species. In the remaining species no specific correlation is observed. These differences in the patterns were dependent on a change of food habits with growth. As little is known of the 137Cs concentration in teleost we have investigated the natural variations of 137Cs in stone flounder. The correlation between growth and the concentration of 137Cs in stone flounder will be discussed.
