Abstract
Multivariate analysis of contaminant data from a multi-year monitoring program demonstrates alterations in the hepatic chemistry of metals in fish exposed to organic contaminants. Metals (Ag, As, Cd, Cu, Fe, Hg, Mn, Ni, Pb, Se, Sn, Zn) and organic chemicals (PCBs, DDTs, chlordanes, dieldrins, PAHs) were measured in liver and associated sediments for winter flounder (Pleuronectes americanus) from 23 sites along the northeast Atlantic coast and for Atlantic croaker (Micropogonias undulatus) from 30 sites along the southeast Atlantic and Gulf of Mexico coasts of the United States. Concentrations of habitat contaminants varied from nil to levels signifying important anthropogenic inputs and thus provided a range in chronic exposures and related contaminant stress levels with which to investigate the response of hepatic chemistry in fish representative of viable populations. The data, analyzed by principal component, principal component regression, and biplot procedures, demonstrated an opposing relationship between micronutrient elements, principally Zn, and exposure to organic contaminants in winter flounder. This relationship was not present in Atlantic croaker that were resident in less contaminated habitats. Based on median concentrations in sediment, exposure of winter flounder to important organic contaminants (polycyclic aromatic hydrocarbons, polychlorinated biphenyls, DDTs) exceeded that for Atlantic croaker by 7 to 50 times. Coincident with depletion of hepatic Zn and Cd in winter flounder was accumulation of Hg and Ag. My results, in agreement with those of others, implicate the negative effects of hepatic detoxification of organic contaminants on metal binding in liver, which can cause depletion of essential elements while contaminant and potentially toxic elements accumulate.
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Hanson, P.J. Response of hepatic trace element concentrations in fish exposed to elemental and organic contaminants. Estuaries 20, 659–676 (1997). https://doi.org/10.2307/1352242
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DOI: https://doi.org/10.2307/1352242