The Great Lakes Fishery Commission is a comprehensive source of fisheries and future plans for each of the Great Lakes. While a bit on the "techinical" side, they have fine, well documented iniformation on the main sport fish species we all are after. Some great videos and graphics also.
Lake Erie Lake Trout Restoratiin Plan: http://www.glfc.org/pubs/SpecialPubs/2008-02.pdf
Different Great Lakes Commiittees: http://www.glfc.org/lakecom/ ,
many species summary reports and lake plans lake by lake.
Main Great Lakes Fisheries Commission webpage: http://www.glfc.org/

Hope this provides some insight into how our wonderful lakes operate and thanks to all for the fine practical real time Western Lake Erie info so many of you post.

Professor Al