Dietary Changes Cause Temporal Fluctuations in Polychlorinated Biphenyl Levels in Herring Gull Eggs from Lake Ontario

1997 ◽  
Vol 31 (4) ◽  
pp. 1012-1017 ◽  
Author(s):  
C. E. Hebert ◽  
J. L. Shutt ◽  
R. J. Norstrom
Keyword(s):  
Polychlorinated Biphenyl ◽  
Lake Ontario ◽  
Herring Gull ◽  
Dietary Changes ◽  
Temporal Fluctuations

Enhanced Airborne Polychlorinated Biphenyl (PCB) Concentrations and Chlorination Downwind of Lake Ontario

2001 ◽  
Vol 35 (16) ◽  
pp. 3280-3286 ◽  
Author(s):  
Jeffrey Chiarenzelli ◽  
James Pagano ◽  
Ronald Scrudato ◽  
Lauren Falanga ◽  
Karen Migdal ◽  
...  
Keyword(s):  
Polychlorinated Biphenyl ◽  
Lake Ontario

Application of a food web bioaccumulation model for the prediction of polychlorinated biphenyl, dioxin, and furan congener concentrations in Lake Ontario aquatic biota

1999 ◽  
Vol 56 (8) ◽  
pp. 1389-1400 ◽  
Author(s):  
Heather A Morrison ◽  
D Michael Whittle ◽  
Chris D Metcalfe ◽  
Arthur J Niimi
Keyword(s):  
Food Web ◽  
Polychlorinated Biphenyl ◽  
Lake Ontario ◽  
Measured Data ◽  
Aquatic Biota ◽  
Metabolic Rates ◽  
Pcb Congeners ◽  
Model Predictions ◽  
Factor Log ◽  
Parameterized Model

A previously developed benthic/pelagic food web bioaccumulation model was parameterized to predict concentrations of nine nonmetabolized polychlorinated biphenyl (PCB) congeners in invertebrates and fish from Lake Ontario. Predicted concentrations were compared with field-measured concentrations to verify the predictability of the model. Overall, 86% of model predictions were within a factor of 2 and 100% of predictions were within a factor of 10 of field-measured concentrations. The parameterized model was used to estimate chemical metabolic rates for 15 PCB, polychlorinated dibenzo-p-dioxin (PCDD), and polychlorinated dibenzo-p-furan (PCDF) congeners that are potentially metabolized. Estimated chemical metabolic rates ranged from 7.5 × 10-3 to 1.0 × 10-7·day-1 and were in general agreement with qualitative studies describing rates of metabolism of these chemicals by aquatic biota. The calibrated model was used to predict concentrations of all 24 PCB, PCDD, and PCDF congeners in invertebrates and fish commonly found in Lake Ontario but for which no field-measured data exist. These concentrations were expressed as the logarithm of the bioaccumulation factor (log BAF). The log BAF's in benthic invertebrates and salmonids ranged from 4.2 to 10.2 and from 5.1 to 11.6, respectively, and were consistent with field-measured BAF's.

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