InfluÃncia da radiaÃÃo gama de alta taxa de dose na sobrevivÃncia e na reproduÃÃo de Biomphalaria glabrata

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

The ionizing radiations are known as mutagenic agents, also causing infertility due to the molecular alterations they induced. This characteristic has motivated the application of this radiation on animal biological control, mainly in situations that involves public health. In this context, the freshwater snail Biomphalaria glabrata can be considered as an excellent experimental model. This work was designed to evaluate biological effects of ionizing radiation, as a result of exposition to a 60Co source with high dose rate, on Biomphalaria glabrata survival and reproduction. For this purpose, adult snails were selected and exposed to dosis ranging from 20 to 60 Gy, with 10 Gy interval; one group not irradiated was kept as control. On all dose levels studied, it was perceived that the radiation improved the embryos production for all exposed individuals. However, the viability indexes were below 6%. On the other hand, the groups irradiated with 50 and 60 Gy presented percentiles of dead animals at the magnitude of 30 and 35%, respectively. Based on these research results, the doses of 20 and 30 Gy are ideal for Biomphalaria glabrata populational control, considering that they caused fertility decrease without killing the exposed snails. More deeply studies are needed; nevertheless, this research evidenced the great potential of high dose rate gamma radiation on Biomphalaria glabrata reproductive control

ASSUNTO(S)

animal radiobiology controle ambiental gamma radiation radiobiologia animal environmental control biomphalaria glabrata reproduÃÃo de moluscos engenharia nuclear molluscs reproduction irradiaÃÃo de moluscos radiaÃÃo gama biomphalaria glabrata molluscs irradiation

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