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(38-01) Bioavailability of lindane in the terrestrial isopod Porcellionides pruinosus: the ageing effect. Santos, Sonia*,1,2, Sousa, Jose Paulo2, Soares, Amadeu3, 1 Escola Superior Agraria, Braganca, Portugal2 Instituto do Ambiente e Vida, Coimbra3 Departamento de Biologia, Aveiro ABSTRACT- Bioaccumulation and biovailability are terms associated to soil contamination issues and it is well known that the detectable concentration of contaminants in the soil cannot fully predict a biological effect. Laboratory studies simulate the worst case scenarios, where animals are exposed to the chemical immediately after contamination. This type of experiments does not always represent the real situation. so it is important to know the evolutionary pattern of a chemical in the environment and in the organisms with time. In this study the bioaccumulation pattern os the pesticide lindane in porcellionides pruinosus was analysed in two types of soil, an artificial OECD soiland a natural agricultural soil. The effect os ageing was analysed over a 10 month period by performing individual bioaccumulation tests at different times after soil contamination. Data obtained inside each test and between the tests (over the 10 months) will be analysed considering the changes in the total soil concentration and in the bioavailable fraction of the compound. The use of this fraction to esplain internal body burdens and the application of the Equilibrium Partitioning Theory in these animals and these scenarios will be discussed. Key words: Bioaccumulation, Bioavailability, Ageing, Isopods |
