Maternal transfer and in ovo exposure of organochlorines in oviparous organisms: a model and field verification

Article Abstract:

This paper discusses a chemical equilibrium model for estimating transference of organochlorines from mother to embryo in fish, and turtles. The authors theorize that chemicals will reach an equilibrium in the ovary during gestation. Three equations are discussed with regard to lipids role in the chemical equilibrium model. To test the model, fish and turtles were taken from the Detroit River and Lake Erie during breading season. Only mature eggs, and samples of tissue were used for the study. The samples were ultimately run through a gas chromatograph. Linear regression analysis showed that the model was an effective modeling tool.

United States, Research, Water pollution, Organochlorine compounds, Organic chlorine compounds

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Development and verification of a bioaccumulation model for organic contaminants in benthic invertebrates

Article Abstract:

A new nonequilibrium, steady-state model, which can better predict the biota sediment accumulation factors of polychlorinated biphenyls in filter-feeding and detritivorous benthic invertebrates is described. It is verified through a field study of PCB congener bioaccumulation in different benthic invertebrate species in Western Lake Erie. Model-predicted and field data were compared, showing that the model's predictability is better than that of the equilibrium partitioning model for assessing bioaccumulation in benthic organisms and for developing sediment quality criteria.

Models, Analysis, Pollutants, Bioaccumulation, Benthos, Benthic zone

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