A model was developed to describe the material uptake and biodeposition of bivalve Mytilus edulis. The existing blue mussel organism level models are based on contradictory assumptions and no agreement has still been found regarding the processes and environmental factors to be included into the model. A reconciliation of contradictory approaches was successfully done in the present model. Using seston concentration, seston organic content and mussel size as input data, the model is able to predict the uptake of suspended material, selection of organic particles and material allocation as pseudofaeces, ingested, assimilated fractions and faeces. The results of the model application to mussels in the south-eastern Baltic conditions are discussed.
The accumulation of cadmium from food and seawater by the blue mussels Mytilus edulis was studied in laboratory conditions.Cadmium uptake from food was found to be just a tenth of that from seawater.The accumulation rate was rather strongly modified by cadmium concentration in seawater.At higher concentration, both, gills and hepatopancreas were the target organs for cadmium, whereas low concentration - cadmium was stored in hepatopancreas only.Considerable fraction of the accumulated cadmium was adsorbed on shell.A distinct difference in the kinetics of cadmium adsorption on shells food and seawater was noticed.
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