Madison, Wisconsin: Wisconsin Department of Natural Resources
Summary
From 1969 through 1973, the 3.7-acre (1.5 hectare) Pleasant Lake Marsh was stocked each spring with adult northern pike (Esox lucius Linnaeus) in an effort to determine the factors that influence the production of fingerlings from managed spawning and rearing marshes. In 1971 and 1972, the 18.5-acre (7.5 hectare) Pabst Marsh was also studied. The annual production from the Pleasant Lake Marsh varied from 324 to 3,243 fingerlings per acre (131 to 1,312 per hectare). The Pabst Marsh produced 681 and 1,052 fish per acre (276 and 426 per hectare) during the two years it was studied. These fingerlings were produced from an average of 12.1 and 11.0 lbs/acre (13.6 and 12.3 kg/ha) of adult females and males, respectively.