Bioaccumulation of polychlorinated dibenzo- p-dioxins, dibenzofurans, and dioxin-like polychlorinated biphenyls in fishes from the Tittabawassee and Saginaw Rivers, Michigan, USA

• Published in: The Science of the total environment Vol. 408; no. 11; pp. 2394 - 2401
• Main Authors: Wan, Yi, Jones, Paul D., Holem, Ryan R., Khim, Jong Seong, Chang, Hong, Kay, Denise P., Roark, Shaun A., Newsted, John L., Patterson, William P., Giesy, John P.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 01.05.2010; [Amsterdam; New York]: Elsevier Science; Elsevier
• Subjects: Agnatha. Pisces; Animal, plant and microbial ecology; Animals; Applied ecology; Benzofurans - analysis; Benzofurans - metabolism; Bioaccumulation; Biological; Biological and medical sciences; Carbon Isotopes; Carp; Contaminants; Dioxin-like PCBs; Dioxins; Ecotoxicology, biological effects of pollution; Environmental Exposure - analysis; Environmental Monitoring; Fish; Fishes - metabolism; Food Chain; Freshwater; Fundamental and applied biological sciences. Psychology; General aspects; Ictalurus punctatus; Lipids; Marine; Michigan; Micropterus salmoides; Nitrogen Isotopes; PCDD/Fs; Polychlorinated biphenyls; Polychlorinated Dibenzodioxins - analogs & derivatives; Polychlorinated Dibenzodioxins - analysis; Polychlorinated Dibenzodioxins - metabolism; Rivers; Rivers - chemistry; Stable isotope; Trophic transfer; Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution; Water Pollutants, Chemical - analysis; Water Pollutants, Chemical - metabolism; United States; North America; America; Michigan; USA, Michigan, Saginaw R; Stable isotope; PCDD/Fs; Bioaccumulation; Trophic transfer; Dioxin-like PCBs; Dioxin derivatives; Trophic factor; Polychlorobiphenyls; Persistent organic pollutant; Vertebrata; Halogenated hydrocarbon; Chlorine Organic compounds; Chlorocarbon; Pisces; Transfer; Aromatic compound; Biological accumulation; Isotopes; Organic compounds
• ISSN: 0048-9697; 1879-1026
• DOI: 10.1016/j.scitotenv.2010.02.003

Characterizing biological factors associated with species-specific accumulation of contaminants is one of the major focuses in ecotoxicology and environmental chemistry studies. In this study, polychlorinated dibenzo- p-dioxins (PCDDs), dibenzofurans (PCDFs), and non- and mono- ortho-substituted polychlorinated biphenyl (PCB) congeners were analyzed in various fish species from the Tittabawassee and Saginaw Rivers (12 fish species; n = 314 individuals), Michigan, USA. Due to their migratory habits, greater δ 13C stable isotope values were found in walleye and white sucker among 12 fish species. Meanwhile, the δ 15N values indicated that the trophic status was least in carp and greatest in largemouth bass. The greatest total concentrations of dioxins were found in fishes with the lowest trophic status (carp ( n = 50) followed by channel catfish ( n = 49)), and concentrations of ΣPCDD/Fs (20–440 pg/g ww (wet weight)), ΣPCBs (16–690 ng/g ww), and TEQs (6.8–350 pg/g ww) in carp were also greater than the least mean concentrations in other fishes. Contributions of various biological factors to the species accumulation were assessed. Body weight and lipid content were found to be the most significant factors influencing accumulation of ΣPCDD/Fs. Lipid content and trophic level seemed to be dominant factors determining accumulation of ΣPCB and TEQs, but negative correlations between trophic status and concentrations of ΣPCBs and TEQs were observed possibly due to the great concentrations in benthivorous fishes such as carp occupying lower trophic levels. These factors can be used to predict the contaminant levels of dioxins and health risks of the fishes in the river ecosystem.