Spatial and long-term trends in persistent organic contaminants and metals in lake trout and burbot from the Northwest Territories

Regions: Sahtu Settlement Area, Dehcho Region, South Slave Region

Tags: contaminants, biology, fish, metals

Principal Investigator: Evans, Marlene (38)
Licence Number: 13862
Organization: Environment Canada, National Water Research Institute
Licenced Year(s): 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004
Issued: Jun 28, 2005
Project Team: Derek Muir (NWRI), George Low (DFO), Jonathan Keating (NWRI), Monica Krieger (Lutsel K'e), Patrick Simon (Fort Resolution), Richard Kochon (Colville Lake), Lee Thom (Fort Simpson)

Project Description: The researchers are trying to determine whether contaminant levels are changing in lake trout and burbot in the Northwest Territories. The researchers will focus their analyses on contaminants such as PCBs, DDT, toxaphene and mercury but also will analyze a subset of fish for new compounds of concern.

During the project, 20 lake trout will be collected from each of the four study locations and 20 burbot will be collected from the West Basin of Great Slave Lake. The fish will be collected by local community members during their normal fishing activities, except in the West Basin, where the trout will be collected by the Hay River commercial fishery. All fish will be captured using gill nets or by angling. Length, age, weight, lipid (fat) content, and sex will be determined for each fish, along with staple isotope measures of feeding.

The study will be conducted at: the East Arm of Great Slave Lake, near Lutsel K’e; the West Basin of Great Slave Lake, near Fort Resolution; Colville Lake; and, Cli Lake, near Fort Simpson. The fish will be captured from August 1 to December 31, 2005.