Weekly News article published: April 24, 2012 by the
Central Office
MADISON – Dozens of volunteers assisted state wildlife researchers in
capturing and placing radio-collars on 132 yearling and adult deer in January,
February and March. Now the
call is
going out again for volunteers to help locate fawns born to does that were
fitted with implant radio transmitters designed to signal when fawns have been
born in mid- to late May.
“With the whitetail birthing season just around the corner, volunteers are
again needed to sweep the woods looking for the newborns,” said Chris Jacques,
Department of Natural Resources research scientist. “When located, fawns will
be fitted with expandable radio collars so we can follow them through their
first year of life to determine causes of death, whether it be due to
nutrition, environment, vehicle, hunters or predators. This is real applied
research and last year’s volunteers found the work rewarding.”
Some hunters have questioned assumptions about fawn recruitment used by
wildlife biologists for estimating deer populations. Recruitment is the net
addition of new fawns to a population each year and is an important input in
estimating deer population numbers. At the end of this three-year effort to
monitor fawns, researchers hope to fine tune their inputs to population
estimates based on real-world data collected in this research effort.
Volunteers will be assigned to search teams working in the vicinity of
Shiocton
in Shawano County and Winter in Sawyer County. When transmitters have been
expelled (presumably when a fawn has been born), a search team will form a line
and comb the woods, somewhat similar to a deer drive, in search of bedded
fawns. Opportunistic searching in high quality fawning habitats also will be
conducted across both study areas. Captured newborns will be fitted with a
radio collar of their own and left for the doe to raise normally.
If a fawn dies, the collar will emit a unique signal that researchers will
again use to locate the animal to determine cause of death. The collars are
designed to expand as the deer grows and eventually drop off as the animal
approaches its first birthday.
Impact of predators on deer populations of special interest to hunters
“Determining causes of death in fawns is vital to the accuracy of our deer
population estimates,” said Jacques. “Of special interest is the impact of
predators on fawn deaths. We have a suite of predators in Wisconsin, including
black bears, bobcats, coyotes, and gray wolves, that may have some impact on
yearly fawn production. What we are less certain of are the relative roles that
each of these predators may play on fawn recruitment over the course of an
entire year.”
During 2011, thanks to the help of volunteers across the state, researchers
enjoyed tremendous success capturing fawns. A total of 104 fawns, including 68
(48 radio collared, 20 ear-tagged) in the Shawano area and 36 (30 radio
collared, six ear-tagged) in the Winter area, were captured.
“Though we have collected just one year of field data, preliminary evidence
indicates that predation (primarily by black bears and bobcats) is likely
having some measurable impact on fawn survival across northern Wisconsin,
having accounted for 14 of 22 (64 percent) deaths during the first month of
life,” according to Jacques. “The predation impact across east central
Wisconsin appears to be considerably lower, having accounted for just six of 18
(33 percent) recorded fawn deaths. Vehicle collisions and fawn abandonment
appear to be primary causes of death, accounting for half of all recorded fawn
deaths in the eastern farmland region. Fawn survival through December 2011 in
the northern and east central study areas was 27 and 63 percent, respectively,
indicating that the northern forest region is a much tougher place to scratch
out a living for fawns than the eastern farmland region of Wisconsin.”
This work is possible only with the involvement and work of dozens of
volunteers representing hunting groups such as the Wisconsin Conservation
Congress, Safari Club International and Whitetails Unlimited, the University of
Wisconsin- Madison and UW-Stevens Point, the AFL-CIO Union Sportsmans Alliance,
and hundreds of Wisconsin citizens.
“Anyone who has looked for newborn fawns or been startled to discover a fawn
lying motionless in the forest or field next to them knows what a challenge it
is to find them,” says Jacques. “They have excellent natural camouflage and
instinct to remain absolutely still when approached. The transmitters will give
us a better idea of where they are but it will still take time on the ground to
locate them.”
For more information and to sign up as a volunteer search
Deer Research on the
DNR website.
FOR MORE INFORMATION CONTACT: Chris Jacques – (608) 221-6358 or Bob Manwell
- (608) 264-9248
The Outdoor Group which is the parent company of Elite Outdoors, LLC and Elite Archery since 2009 has since announced on March 8, 2012 that it has finalized the acquisition of assets and business of Scott Archery and Custom Bow Equipment.
