Organochlorine accumulation by sentinel mallards at the Winston-Thomas sewage treatment plant, Bloomington, Indiana

Custer, T. W.; Sparks, D. W.; Sobiech, S. A.; Hines, R. K.; Melancon, M. J.

Abstract:

Farm-raised 12-month-old female mallards (Anas platyrhynchos) were released at the Winston-Thomas sewage treatment plant, Bloomington, Indiana. Five mallards were sacrificed at the start of the study and at approximately 10-day intervals through day 100. Concentrations of polychlorinated biphenyls (PCBs) in carcasses increased linearly with time of exposure and exceeded 16 g/g wet weight by day 100; PCBs in breast muscle exceeded 3.9 g/g by day 100. These PCB values are among the highest recorded for wild or sentinel waterfowl. PCB concentrations in breast muscle (26a??523 g/g lipid weight) were 50a??1,000 times greater than human consumption guidelines for edible poultry in Canada (0.5 g/g lipid weight) and 9a??176 times greater than consumption guidelines for edible poultry in the United States (3.0 g/g lipid weight). Additionally, PCB concentrations in carcass and breast muscle exceeded the threshold of the Great Lakes Sport Fish Consumption Advisory do not eat category (1.9 g/g wet weight) by day 20 and day 50, respectively. Hepatic cytochrome P450-associated monooxygenases including BROD (benzyloxyresorufin-O-dealkylase), EROD (ethoxyresorufin-O-dealkylase), and PROD (pentoxyresorufin-O-dealkylase) were induced over 5-fold compared to reference mallards. BROD, EROD, and PROD were each significantly correlated to total PCBs and to the toxicity of selected PCB congeners, relative to 2,3,7,8-tetrachlorodibenzo-p-dioxin.

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Article

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1003175

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Custer, T. W.; Sparks, D. W.; Sobiech, S. A.; Hines, R. K.; Melancon, M. J.

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Upper Midwest Environmental Sciences Center

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169

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English

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Archives of Environmental Contamination and Toxicology

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pp. 163-169

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Organochlorine accumulation by sentinel mallards at the Winston-Thomas sewage treatment plant, Bloomington, Indiana; 1996; Article; Journal; Archives of Environmental Contamination and Toxicology; Custer, T. W.; Sparks, D. W.; Sobiech, S. A.; Hines, R. K.; Melancon, M. J.