ORCID Profile
0000-0002-3749-7554
Current Organisation
University of Tasmania
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Publisher: Wiley
Date: 03-1997
Publisher: Elsevier BV
Date: 03-1994
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 s les. 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 micrograms/g).
Publisher: Elsevier BV
Date: 1993
Publisher: Waterbird Society
Date: 03-2008
Publisher: Springer Science and Business Media LLC
Date: 12-2002
Publisher: Wiley
Date: 10-1996
Publisher: Informa UK Limited
Date: 03-2015
DOI: 10.1071/MU13086
Publisher: Springer Science and Business Media LLC
Date: 04-1993
DOI: 10.1007/BF01128730
Publisher: JSTOR
Date: 1995
DOI: 10.2307/1521524
Publisher: Elsevier BV
Date: 05-2020
Publisher: Waterbird Society
Date: 03-2011
DOI: 10.1675/063.034.0108
Publisher: Elsevier BV
Date: 1993
Publisher: Elsevier BV
Date: 1996
Publisher: Wiley
Date: 08-1998
No related grants have been discovered for Heidi Auman.