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The Saguenay Fjord retains sediments containing heavy metals and organic compounds from industries upstream; fisheries were closed due to mercury contamination in the 1970s. Mercury in sediments and biota has since declined due to pollution control, but there are no data for chemicals such as chlorinated dioxins and furans. Therefore, metals (Hg, Pb, Cd, Ni), polynuclear aromatic hydrocarbons (PAHs), PCBs, and chlorinated pesticides, phenols, dioxins and furans were measured in sediments, fish, and benthic invertebrates within the Fjord and at Baie des Anglais and Baie des Mille Vaches (Estuary). Levels of PAHs in sediments decreased with distance from their source …
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We measured chemicals in American eels purchased in 1990 from fishermen in Kamouraska, Cacouna (s. shore) and Saint-Irénée (n. shore), and sampled from a shore tributary (controls). Eels from Kamouraska contained more PCBs, mirex and pesticides than controls but no more than eels from the other sites. Mercury did not vary among sites, and PAHs, dioxins and furans were usually undetectable and well below guidelines. Levels of PCBs and mirex have declined by 68 and 56% respectively since 1982, with only 36% exceeding guidelines for PCBs, compared to 80% in 1982; for mirex, the percentage was 52% in 1982 and …
