Population Dynamics of Large Walleye in Big Sand Lake

摘要

Walleye population parameters in Big Sand Lake, Hubbard County were estimatedfrom 3 years of tagging and creel surveys. Estimated walleye biomass and annual yield were midrange of other North American walleye lakes. Although growth of Big Sand Lake walleye was slightly faster than walleye in other Minnesota lakes, the quality size structure was due to sustained growth rates at large sizes and low mortality rates. The experimental regulation allowing harvest of only one walleye greater than 508 mm had little effect on the walleye population in Big Sand Lake.