Guidance for Safe Consumption of Walleye from Inland Lakes within the Ceded Territories of Wisconsin, Michigan, and Minnesota

 

     The harvest of ogaa (walleye) from inland lakes is an important part of the Anishinaabe lifeway. By participating in the spring and winter spearing seasons, tribal members reaffirm their off-reservation treaty harvest rights while providing their families with a nutritious food source. Yet, along with this tradition often comes a concern about exposure to mercury through consumption of fish. GLIFWC’s Mercury Maps are available to help tribal members make informed choices that allow continued ogaa consumption while reducing their exposure to mercury.  The maps provide the facts about mercury levels in ogaa in ceded territory waters where member tribes commonly harvest these fish.

 

How to Use the Mercury Maps


      Mercury Maps are available below for the six GLIFWC member tribes in Wisconsin as well as the 1837 ceded territory of Minnesota and portions of the 1842 ceded territory of Michigan. The Mercury Maps for Wisconsin and Michigan show the lakes from which ogaa are typically harvested by a given member tribe. The Minnesota map shows all lakes in the 1837 ceded territory of Minnesota that are available for tribal harvest.  The top map applies to women of childbearing age and children under 15 years of age. The bottom map applies to the remainder of the population, men 15 years of age and older and women beyond childbearing age. Each lake on the map is color coded to display how many meals of walleye per month from that lake have been deemed safe to eat. As can be seen on the two maps, fewer meals are recommended for children under the age of 15 and women of childbearing age in order to protect the developing brain of the fetus or child from the potential detrimental effects of mercury. 

 

Bad River
Lac Courte Oreilles
Lac du Flambeau
Mole Lake
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Red Cliff
St. Croix
Minnesota
Michigan
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Suggestions for Reducing Mercury Exposure

 

There are a number of ways to reduce exposure to mercury while still harvesting and consuming ogaa:

Alternatively, tribal members can choose to eat safer giigoonh (fish) species known to contain less mercury. Giigoonh such as walleye, muskellunge, largemouth bass, smallmouth bass, and northen pike generally contain more mercury than other giigoonh such as lake whitefish, herring, bluegill, crappie, perch, or sunfish.

 

Fish contain a number of nutrients that are critical to good health. By making informed desicions about the size and species of fish eaten and the lake from which those fish are harvested, tribal members can safely eat ogaa and other giigoonh as a part of a healthy diet.

 

In an effort to best serve our member tribes, the Environmental Section will continue to modify the information presented on the maps as science in this area advances and additional ogaa mercury data become avavilable.

 

Reports

2009-2010 Walleye Total Mercury Analyses

2008 Walleye Total Mercury Analyses

2007 Walleye Total Mercury Analyses

2006 Walleye Total Mercury Analyses

2005 Walleye Total Mercury Analyses

2003-2004 Walleye Total Mercury Analyses

 

For more information on mercury contamination in fish:
http://www.epa.gov/waterscience/fishadvice/advice.html