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    Tracing simultaneous cadmium accumulation from different uptake routes in brown crab Cancer pagurus by the use of stable isotopes.

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    Authors
    Wiech, Martin
    Amlund, Heidi
    Jensen, Karl Andreas
    Aldenberg, Tom
    Duinker, Arne
    Maage, Amund
    Type
    Article
    Language
    en
    
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    Title
    Tracing simultaneous cadmium accumulation from different uptake routes in brown crab Cancer pagurus by the use of stable isotopes.
    Published in
    Aquat Toxicol 2018; 201:198-208
    Publiekssamenvatting
    High concentrations of cadmium in brown crab are an issue of food safety, and large variations between different areas have been found. To investigate the relative importance of dietary and aqueous uptake regarding the overall accumulation in brown crab, we used stable isotopes to trace the uptake from both routes simultaneously in the same animals. We demonstrated that the analytical challenges regarding background concentrations of natural isotope distribution and polyatomic interferences in the different matrices can be overcome with an appropriate analytical setup and modern mathematical corrections using a computer software. Cadmium was accumulated via both routes and was found in all measured organs at the end of the exposure phase. The obtained data were used to establish accumulation curves for both uptake routes and estimate accumulation parameters for hepatopancreas, as the most important organ in crab regarding total cadmium body burden. Using the estimated parameters in combination with naturally relevant cadmium concentrations in seawater and diet in a model, allowed us to predict the relative importance of the aqueous and dietary uptake route to the total hepatopancreas burden. According to the prediction, the dietary route is the main route of uptake in brown crab with a minimum of 98% of the accumulated cadmium in hepatopancreas originating from diet. Future studies addressing the source and accumulation of cadmium in crab should therefore focus on the uptake from feed and factors connected to foraging.
    DOI
    10.1016/j.aquatox.2018.05.015
    PMID
    29966918
    URI
    http://hdl.handle.net/10029/622092
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.aquatox.2018.05.015
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