The effect of dietary lipid composition on the intestinal uptake and tissue distribution of benzo[a]pyrene and phenanthrene in Atlantic salmon (Salmo salar).

Uptake of polycyclic aromatic hydrocarbons (PAHs) across the intestine is suggested to occur in association with dietary lipids. Partial replacement of fish ingredients by vegetable ingredients in aquafeeds has led to increased levels of PAHs in marine farmed fish. We therefore investigated, intestinal uptake, tissue distribution and PAH metabolism after a single dose of (14)C-benzo[a]pyrene (BaP) or (14)C-phenanthrene (PHE) given to Atlantic salmon (Salmo salar) acclimatized to a fish oil or vegetable oil based diet.

Disposition of arsenobetaine in two marine fish species following administration of a single oral dose of [14C]arsenobetaine.

The distribution and excretion of arsenobetaine in fish were investigated using whole body autoradiography and liquid scintillation counting. A single dose of synthesised [(14)C]arsenobetaine was orally administered to Atlantic salmon, Salmo salar L., and Atlantic cod, Gadus morhua L.

Cadmium accumulation and Cd-binding proteins in marine invertebrates--a radiotracer study.

Tissue and subcellular accumulation of cadmium were studied in different tissues of three marine invertebrates (blue mussel Mytilus edulis, the tunicate Ciona intestinalis and the sea star Asterias rubens) using radioactive 109Cd as a tracer. The organisms were exposed to 0.05, 2 and 50 microg Cd l(-1) for 21 days.