program 2012 - iaglr

May 17, 2012 - Ontario Ministry of the Environment, Environmental Monitoring and ..... The Ontario Ministry of Environment maintains a network of nearshore monitoring sites ... generated by fish contaminant levels in order to provide the best possible ...... All coding is open source and the model is available for general use.
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55th Annual Conference of the International Association for Great Lakes Research

From Great Lakes flow Mighty Rivers

ABSTRACT BOOK

IAGLR CORNWALL ONTARIO CANADA May 13-17, 2012

 

55th Annual Conference   Interna onal Associa on for Great Lakes   Research Conference (IAGLR)   

From Great Lakes Flow Mighty Rivers  

IAGLR May 13‐17, 2012  NavCentre, Cornwall, ONTARIO CANADA    PUBLISHED BY   Interna onal Associa on for Great Lakes Research Office  4840 South State Rd., Ann Arbor, Michigan 48108  www.iaglr.org    COPYRIGHT 2012 

IAGLR

2012

From Great Lakes Flow Mighty Rivers  

 

Co‐Chairs  Dr. Jeff Ridal, Execu ve Director  St. Lawrence River Ins tute of Environmental Sciences     Dr. Peter Hodson, Queen’s University   Dr. Linda Campbell, Queen’s University  and St. Mary’s University    Program Chairs  Dr. Jeff Ridal, Execu ve Director   St. Lawrence River Ins tute of Environmental Sciences   Dr. Jérôme Marty, Research Scien st  St. Lawrence River Ins tute of Environmental Sciences     Conference Coordinator  

 

 

Local Organizing Coordinator 

Mary Ginnebaugh 

 

 

Chris na Collard 

 

IAGLR Business Manager Wendy L. Foster 

 Conference Commi ee and IAGLR Board of Directors 

Conference Commi ee 

 

IAGLR Officers and Board Members:  Officers     Robert J. Letcher,  President        James R. Bence, Vice President     Robert Heath, Past President       Thomas M. Holsen, Treasurer     Amanda E. Poste, Ac ng Secretary            Board Members   Linda Mortsch            Prosper Zigah, Student Member  Katherine Hargan, Student Member  Sco  Higgins   Stephen R. Hensler     Peter J. Dillon 

Our sincere apprecia on for their   contribu on  

Paula McIntyre, (Lorac Design LLP) 

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Michael Twiss  

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Session Chairs 

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Our Volunteers 

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IAGLR Board of Directors 

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Conference Commi ee  

 

IAGLR

2012

From Great Lakes Flow Mighty Rivers  

4

IAGLR 2012- Book of abstracts

ABMA, R.A. and HAFFNER, G.D., Great Lakes Institute for Environmental Research, 401 Sunset Ave., Windsor, ON, N9B 3P4. Mercury Bioaccumulation in Lake Trout Reflects Non-Steady State Dynamics. Mercury toxicity has been a relevant, global issue since it was discovered to be a severe neurotoxin in 1958. Mercury levels in the Great Lakes region have been monitored since the 1970s after the first signing of the Great Lakes Water Quality Agreement. Since then, bioenergetics and kinetics models have been proposed as means of predicting mercury body burden in fish. Although these models are accurate for some species and sites, they are less predictive when applied to others. My study investigated an assumption associated with current models: that all parameters remain constant over time. The study looked at lake trout, a predatory species used for contaminant biomonitoring since the late 1970s. 150 lake trout were collected from 4 sites across Lake Huron, then were processed and analyzed for whole-body mercury contamination. Individuals were aged using otoliths and separated into age classes. Cohort analysis revealed a nonlinear increase of mercury body burden with increasing age, indicating that lake trout do not reach steady state mercury accumulation at any time between the ages of 011. This means that one or more parameters of the model continue to change over time. These data emphasize the necessity of considering non-steady state accumulation dynamics for future bioenergetics and kinetics modeling of mercury. Keywords: Trout, Bioaccumulation, Mercury. ACKERMAN, J.D.1, BOUFFARD, D.1, BOEGMAN, L.2, and YERUBANDI, R.R.3, 1I