Predator Research Finds Dramatic Results

Duck nesting success can be improved up to 500 percent by
removing predators from key habitat areas during the nesting
season, according to research conducted by the Delta Waterfowl
Foundation in 1994.

Dr. Frank Rohwer, director of research for Delta Waterfowl state,
"We found an apparent nest success of 71 percent on ducks nesting
in upland cover within the predator reduced study block.
Research completed on a similar study block with no predator
control found a 14 percent nest success."

The research was conducted in Towner County, North Dakota, in the
center of the prairie pothole duck production region. Two
16-square-mile blocks (approximately 10,000 acres) of similar
habitat and land use were selected at random. Duck nest
predators were reduced by trapping from one block over a
four-month period, while the other block served as a control with
no predator removal. Target species were red fox, skunk and
raccoon, and only approved techniques primarily trapping and
snares were used.

Nearly 300 predators were removed from the treatment block,
including 117 red fox, 116 raccoons and 49 skunks. In that same
area, 250 duck nests were located and 177 successfully hatched. 
In the control area, 150 nests were found and only 21 hatched. 
Total cost for reducing predators in the treatment block was $2
per acre. 

(From: Delta Waterfowl Report, Spring 1995 via Natural and
Environmental Resources Report, American Farm Bureau Federation)