
The Michigan Department of Natural Resources continues to make advancements in the state’s Great Lakes muskellunge program, and activities this spring will add to those efforts.
Since 2011, the DNR’s Fisheries Division has collected spawning Great Lakes strain muskellunge in the Detroit River. The collected eggs are reared at Wolf Lake State Fish Hatchery in Mattawan and stocked throughout the state in fall. Although the Detroit River is a natural source of this native strain, it presents several challenges.
Water temperatures on the Detroit River typically do not reach optimal levels for spawning until late May or early June, much later than smaller inland waterbodies. This results in a short rearing period and fish not reaching maximum size for stocking each fall. Additionally, the Detroit River’s expansiveness makes it extremely difficult to efficiently find spawning fish.
To offset these issues, DNR fisheries staff have been working to establish inland broodstock lakes. Since 2011, Thornapple Lake in Barry County has been stocked with Great Lakes strain muskellunge to establish a population large enough to provide a spawning population. Starting in 2017, Lake Hudson, previously the long-standing broodsource for northern strain muskellunge, was selected as the department’s second broodstock lake. When the populations are large enough, spawning fish will be netted from these inland lakes rather than the Detroit River. Read more