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New DNR study links chronic wasting disease prevalence above ~30% to deer population declines
Summary
DNR research presented to the board found that chronic wasting disease (CWD) substantially reduces adult survival and that modeled population growth falls below replacement when CWD prevalence reaches roughly 29–30% in study areas, with implications for long-term deer trends in high-prevalence counties.
Dr. Dan Storm, the DNR’s deer research scientist, presented results from a multi-year study that collared more than 1,000 deer (including 766 GPS-collared adults and over 300 fawns) in a high-prevalence area of southwest Wisconsin to estimate how chronic wasting disease (CWD) affects survival and population dynamics. He described capture methods (net drops, chemical immobilization, GPS collars and rectal biopsy for live testing) and…
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