Most Michigan deer hunters are well aware that epizootic hemorrhagic disease (EHD) has reared its ugly head at historic levels in Michigan this year.
A viral disease that it transmitted by the bite of a fly called a
midge, EHD causes deer to die from internal bleeding. It has been found
in 30 counties in Michigan this year, mostly in the southern third of
the state, though it has been documented in Clare and Osceola counties
and is suspected as far north as Presque Isle and Benzie counties. This
is the largest, most widespread outbreak of the disease in Michigan
First described in Michigan in 1955, EHD wasn’t seen again until 1974
and then not again until after the turn of the century. Since 2006,
however, it has occurred at some level every year except 2007.
EHD is widespread across the Midwest this year, something that is
thought to have been caused by last winter’s unusually mild weather as
well as this year’s drought. The tiny flies (about one-tenth of an inch
in length) that carry EHD typically breed in mud flats, and this
summer’s drought has expanded areas where midges of the genus Culicoides
can reproduce. In most years, those mud flats would be underwater.
“Other states around us – Indiana, Illinois and Ohio – have seen this
more frequently, and some of them have it from one end of the state to
the other,” explained Brent Rudolph, the deer and elk program leader for
the Department of Natural Resources. “In Michigan, it’s been mostly
restricted to the southern third of the state, though we’ve had a couple
of cases that bounced up above the line.”
Rudolph said that states from South Dakota to Kansas have reported more
widespread mortality this year than ever before. Deer with EHD suffer
from high fevers and head toward water to seek relief. Their bodies are
often found in or near ponds, rivers or creeks.
EHD tends to be highly localized; in some cases the disease causes
large die-offs in part of a township while areas just a few miles away
show no sign of the disease.
Often referred to by hunters as “blue tongue” – a similar, though
different disease – EHD shows up in the herd in the summer months, after
regulations have been developed for the upcoming hunting season.
The DNR has no estimate of total EHD mortality, though it has had more than 13,000 dead deer reported.
Rudolph said that EHD has never caused widespread or long-term impacts
to deer populations, though local effects can be significant and can
last for a few years.
“Until this year, we’ve never seen enough EHD in Michigan to cause
population declines at a broad scale, but the southwestern corner of the
state – Cass and St. Joseph counties – has had EHD a couple of years in
a row, in 2010 and 2011, and now again this year,” he said.
Because of this trend, DNR Director Keith Creagh today signed an
emergency order that decreases antlerless license purchase limits for
deer management units (DMUs) where the most EHD-related die-offs have
occurred. Director Creagh signed the order at the regular monthly
meeting of the Natural Resources Commission.
Effective immediately, the purchase limit for DMU 486 is five private
land antlerless deer hunting licenses per hunter. Also effective
immediately, the public antlerless license purchase limit per hunter is
two for each of the following DMUs: 012 (Branch), 034 (Ionia), 039
(Kalamazoo), 041 (Kent), 044 (Lapeer), 076 (Sanilac), 078 (Shiawassee),
079 (Tuscola) and 080 (Van Buren).
Individuals who purchased antlerless licenses prior to this emergency
order are not required to return licenses. This order only applies to
antlerless licenses purchased on or after Nov. 8, 2012.
“We’re encouraging hunters to use their best judgment,” Rudolph said.
“If a hunter is in an area of an outbreak, backing off – or not taking
an antlerless deer at all – is an appropriate thing to do.”
From the information that was received from numerous volunteers, a
weekly EHD map has been compiled, which may help aid hunters with their
harvest decisions. The map and other EHD information including how
hunters can report sighting of deer (under Current Issues).
Deer hunters and others interested in deer management in Michigan are
invited to join the Department of Natural Resources at 7 p.m. on
Tuesday, Nov. 13, for “DNR Live: Deer” – a one-hour, online forum
designed to answer questions from the public about the state’s deer
population, hunting seasons, EHD, regulations and other topics. The
online forum’s panel of DNR experts will include the Wildlife Division’s
deer and elk program leader Brent Rudolph and wildlife veterinarian
Steve Schmitt, along with Law Enforcement Division Assistant Chief Dean
Written in: Outdoorsnews