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Service Biologists Co-Chair Modeling Subcommittee Meeting for 1836 Treaty Waters
Midwest Region, March 13, 2008
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Fishery Biologist Aaron Woldt of the Alpena National Fish and Wildlife Conservation Office (NFWCO) along with John Netto of the Green Bay NFWCO co-chaired the March 11-13 meeting of the Modeling Subcommittee (MSC) of the Technical Fisheries Committee (TFC).  The primary focus of this meeting was to generate preliminary 2008 harvest limits for lake trout in 1836 Treaty waters of lakes Huron, Superior, and Michigan.  As stipulated in the 2000 Consent Decree, preliminary lake trout harvest numbers must be calculated by the MSC, reviewed by the TFC, and presented to the parties to the decree by March 31 each year.  The MSC will complete final lake trout harvest numbers and present them to the TFC for review at the May TFC meeting.

Biologist Woldt and Ji He of the Michigan Department of Natural Resources (DNR) presented an update of the status of northern Lake Huron (MH-1 and MH-2) lake trout stock assessment models, model diagnostic output, and preliminary 2008 lake trout harvest limits.  In MH-1, the 2008 preliminary lake trout harvest limit increased from 2007 due to changes in the lake trout population structure and better survival of young fish.  In MH-2, the 2008 preliminary harvest limit declined from 2007, but the rate of decline has stabilized compared to previous years.  The MSC will continue to evaluate and monitor these changes.  Preliminary harvest limits were presented to the TFC for review on April 1.

In addition to performing model analyses, biologist Woldt helped run the MSC meeting ensuring all agenda items were discussed and kept meeting minutes.  A preliminary draft of the March 11-13 MSC meeting minutes was emailed to MSC members for review.

Contact Info: Midwest Region Public Affairs, 612-713-5313, charles_traxler@fws.gov



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