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Accumulation of 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalents by double-crested cormorant (Phalacrocorax auritus, Pelicaniformes) chicks in the North American Great Lakes

Citation

Jones, PD and Giesy, JP and Newstead, JL and Verbrugge, DA and Ludwig, JP and Ludwig, ME and Auman, HJ and Crawford, R and Tillitt, DE and Kubiak, TJ and Best, DA, Accumulation of 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalents by double-crested cormorant (Phalacrocorax auritus, Pelicaniformes) chicks in the North American Great Lakes, Ecotoxicology and Environmental Safety, 27, (2) pp. 192-209. ISSN 0147-6513 (1994) [Refereed Article]

Copyright Statement

Copyright 1994 Academic Press, Inc.

DOI: doi:10.1006/eesa.1994.1016

Abstract

Concentrations of polychlorinated biphenyls (PCBs), and 2,3,7,8-tetrachlordibenzo-p-dioxin equivalents (TCDD-EQ) were determined in eggs and chicks of double-crested cormorants (DCC) which were collected in 1989 from eight locations in the Laurentian Great Lakes. The mean biomagnification factor (BMF) from forage fish to eggs was found to be 31.3. Absolute and relative concentrations as well as rates of accumulation of total concentrations of PCBs and TCDD-EQ were measurable in all of the samples. The concentrations of both PCBs and TCDD-EQs decreased immediately upon hatching of chicks, due to growth dilution. Initial decreases in absolute masses of TCDD-EQ in chicks were also observed, which indicates that there can be significant elimination of these compounds during early development. The initial rates of accumulation by chicks were dependent only on the mass of fish consumed. After the chicks began thermoregulating, the rates of accumulation, expressed as a concentration, normalized to body weight, became greater. Rates of accumulation of both PCBs and TCDD-EQ were correlated with their respective concentrations in forage fish consumed by the chicks. The relative potency, expressed as the ratio of the concentration of TCDD-EQ to that of total PCBs was calculated to determine if there was significant trophic-level enrichment of the TCDD-EQs, relative to total concentrations of PCBs. A significant enrichment was observed at the more and less contaminated locations, but the degree of enrichment was greater at the less contaminated locations (26 vs 72 μg/g).

Item Details

Item Type:Refereed Article
Keywords:waterbirds, 2,3,7,8-TCDD, dioxin, cormorant, Great Lakes, PCBs, toxic equivalents
Research Division:Biological Sciences
Research Group:Biochemistry and Cell Biology
Research Field:Analytical Biochemistry
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Biological Sciences
Author:Auman, HJ (Dr Heidi Auman)
ID Code:106164
Year Published:1994
Web of Science® Times Cited:24
Deposited By:IMAS Research and Education Centre
Deposited On:2016-02-01
Last Modified:2016-05-18
Downloads:0

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