Beseau Lake has a history of providing fair to good fishing for panfish, bass, northern pike, and walleye between winterkills. Severe winterkills have not been frequent in this lake. However, it did experience heavy fish mortality in 1994, moderate mortality in 2001, and very light mortality in 2004. The 2001 kill occurred despite the operation of an aeration system by the lake association in cooperation with the Cormorant Lakes Sportsmens Club. Even though walleyes have been stocked regularly for over two decades, and sporadically since 1916, test net catches have consistently remained quite low in this lake. The gill net catch rate in 2006 was 1.2 walleyes per set. Although walleyes were not abundant, they were relatively large with an average length of 21.8 inches and average weight of 3.8 pounds. Northern pike and black crappie have survived in this lake without stocking. Catch rates for both were slightly above the lakes historical averages in 2006. Pike averaged about 2.5 pounds in weight and 22.9 inches in length, though fish over 30 inches were sampled. Crappies were generally young and small, but a few larger individuals were found and there is a strong 2003 year class that should provide good fishing in coming years if no winterkill occurs. Increasing numbers of black bullheads may be an indicator of declining water qauality in Beseau Lake. One data point is not sufficient to draw any firm conclusions, but does illustrate the need to be vigilant. In six lake studies from 1964 through 2001, black bullhead catches had never risen higher than 18.4 per trap net. In 2006, catch rates rose to 166.9 black bullheads per trap net. It behooves lakeshore owners and all watershed dwellers to be good land stewards in order to slow the aging process in this lake that is already marginal for supporting a fish community.