Long term sediment trap polychlorinated biphenyl (PCB) trends at Lock and Dam 3 and 4 (1987-2017). PCB concentration is in nanograms/g and normalized to 1% total organic carbon content.

Eurasian watermilfoil: long-term trends in unmanaged populations The Wisconsin Department of Natural Resources conducts and supports a variety of projects that improve our understanding of aquatic …

Population Statistics

Population Statistics & Trends Fawn to doe ratios and yearling buck percentages are used to help estimate the deer herd size annually and is the starting point for setting antlerless harvest quotas.

Fawn to doe ratios collected in late summer give information on fawn recruitment and survival and are used as an input into the formula for annual deer herd abundance estimation. Fawn to doe ratios …

Harvest Statistics

The primary objective of Long Term Trend (LTT) Lakes monitoring is to document long-term trends in lake water chemistry. This data set also provides context for water chemistry in other lakes in terms …

Deer herd abundance is estimated annually with hunter-collected data and a mathematical model to get post hunt deer population estimates. For additional Information….

Non-CWD: EHD was not detected in any county in 2022 or 2023. EHD History Epizootic hemorrhagic disease (EHD) is an acute, infectious, viral disease spread by biting insects (especially midges) that …

To better understand the use of strategic manage-ment to control EWM, we are tracking population trends and management actions on 24 lakes in Wis-consin. This study will help us assess costs and …