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(77-12) INIA proposal to establish the bioaccumulation potential of pesticides on terrestrial vertebrates. Pablos, Ma Victoria1, Vega, M Milagros1,2, Ramos, Carmen1, Tarazona, José*,1, 1 Laboratory for Ecotoxicology. INIA, Madrid, Spain2 ERA Consult. PO Box 3350, Madrid, Spain ABSTRACT- The environmental risk assessment for pesticides includes the potential for bioaccumulation of these compounds in fish. This estimation allows the establishment of the risk of both piscivorous avian and mammals; but no protocols have been developed for the estimation of the bioaccumulation potential of pesticides for birds and mammals through the food chain. This work presents a simplified model to assess this potential, calculating for each trophic level, the percentage of the total intake that is retained by the organisms. The information can be obtained from the experimental assays or estimated from a combination of default values and the available data of the pharmacokinetic section included in the monographs. The terrestrial food chain used in this protocol takes into account the different trophic levels for birds and mammals, including insectivorous, herbivorous, granivorous and omnivorous animals, and as higher levels, carnivorous and top predators. The model has been previously validated for freshwater and marine food chains. The work presents a similar model for terrestrial food chains, using real data of different pesticides with bioaccumulation potential. Key words: pesticides, bioaccumulation, biomagnification, terrestrial vertebrates |
