Comparative analysis of doses to aquatic biota in water bodies impacted by radioactive contamination.
J Environ Radioact
; 108: 9-14, 2012 Jun.
Article
em En
| MEDLINE
| ID: mdl-21924530
ABSTRACT
Comparative analysis of doses to the reference species of freshwater biota was performed for the following water bodies in Russia or former USSR Chernobyl NPPs cooling pond, Lakes Uruskul and Berdenish located in the Eastern Urals Radioactive Trace, Techa River, Yenisei River. It was concluded that the doses to biota were considerably different in the acute and chronic periods of radioactive contamination. The most vulnerable part of all considered aquatic ecosystems was benthic trophic chain. A numerical scale on the "dose rate - effects" relationships for fish was formulated. Threshold dose rates above which radiation effects can be expected in fish were evaluated to be the following 1 mGy d(-1) for appearance of the first morbidity effects in fish; 5 mGy d(-1) for the first negative effects on reproduction system; 10 mGy d(-1) for the first effects on life shortening of fish. The results of dose assessment to biota were compared with the scale "dose rate - effects" and the literature data on the radiobiological effects observed in the considered water bodies. It was shown that in the most contaminated water bodies the dose rates were high enough to cause the radiobiological effects in fish.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Doses de Radiação
/
Poluentes Radioativos da Água
/
Peixes
/
Água Doce
Limite:
Animals
País/Região como assunto:
Asia
/
Europa
Idioma:
En
Revista:
J Environ Radioact
Ano de publicação:
2012
Tipo de documento:
Article