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Michigan is home to two strains of muskellunge - the Great Lakes muskellunge and the northern muskellunge. Naturally-reproducing populations of northern muskellunge are located primarily in the western Upper Peninsula, but they have been stocked in numerous lakes statewide.
Northern strain muskellunge were the primary strain stocked in Michigan until 2011 when the State shifted to raising only Great Lakes strain muskellunge. Still, northern strain fish are occasionally stocked through cooperative arrangements with other states and muskellunge organizations.
Naturally-reproducing populations of Great Lakes muskellunge exist in the Great Lakes and various connected waters, and they are also stocked into inland lakes and rivers where they typically do not naturally reproduce.
Tiger muskellunge, a hybrid between northern pike and muskellunge, were once stocked in Michigan, but no longer are raised in state fish hatcheries. Naturally-produced tiger muskellunge are rarely caught, though they are more prevalent in lakes with high abundance of northern pike. Inland lakes in Michigan reserved as broodstock waters include Thornapple Lake in Barry County and Lake Hudson in Lenawee County.