The survival and growth of 4, 8 and 12 inch muskellunge (Esox masquinongy) fingerlings stocked at the rate of 4/acre in four northern Wisconsin lakes in 1976 and 1977 were investigated. Fish from the six separate stockings were given a distinctive fin clip and data on survival and growth were obtained in subsequent electrofishing and fyke netting collections.
In Arrowhead Lake, in all three size groups survival was similar for fish stocked in 1976 but for those stocked in 1977 survival was highest for 12 inch fingerlings. Survival was also highest for the 12 inch fingerlings stocked in Branch and Johnson lakes in both years, but in Sparkling Lake survival was negligible both years for all stocked fingerlings. Growth in Arrowhead Lake was better than growth of fingerlings in hatchery rearing ponds. The good survival and growth of fingerlings stocked in Arrowhead Lake may be attributed to the low density of northern pike and other predators and an abundant supply of your-of-year yellow perch (Perca flavescens), a good potential food source.
Small muskellunge fingerlings (4 inches) can contribute to a sport fishery when stocked in a lake with a low density of predators and a good supply of suitable forage. Where moderate – large northern pike populations exist it is recommended that only larger (12 inches) fingerlings be stocked.