CWD Confirmed in Wild Michigan Deer

By Tony Hansen

The nightmare has come home.

Earlier today, the Michigan Department of Natural Resources issued a release confirming the presence of chronic wasting disease (CWD) in a wild, free-ranging deer in southern Michigan. The infected whitetail (a pregnant doe) was reported by a Meridian Township resident in April, after it was observed behaving strangely in the homeowner’s yard.

The deer was euthanized by animal control officers and tested for CWD. The results were positive.

“This is the first case of chronic wasting disease to be confirmed in a free-ranging, Michigan white-tailed deer,” said DNR Director Keith Creagh.

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“While it is a disappointing day for Michigan, the good news is that we are armed with a thoughtfully crafted response plan,” Creagh said. “We are working with other wildlife experts at the local, regional, state, and federal level, using every available resource, to determine the extent of this disease, to respond appropriately to limit further transmission, and ultimately to eradicate the disease in Michigan, if possible.”

I will admit that part of me expected this day to come. CWD was previously confirmed in Michigan’s neighboring states of Wisconsin and Illinois. A few years back, CWD was discovered in a captive whitetail in southwest Michigan. I knew this was a possibility… if not an inevitability.

But I wasn’t expecting the disease to be discovered so close to home or that the confirmation would be from testing a wild deer. And, yes, I guess I was naively hoping Michigan would be spared.

It wasn’t.

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It’s no secret that most cases of CWD are somehow directly tied to the presence of a high-fence deer facility in the vicinity. It’s far too early to tell whether that is the case here, but Michigan has no shortage of registered (and likely some unregistered) captive deer farms, including several in the area the diseased deer was discovered.

CWD is an always-fatal neurological disease. It is highly contagious to other whitetails, but there is no credible evidence to suggest that it can be passed to humans or to livestock.

In neighboring Wisconsin, the discovery of CWD in 2002 led to a CWD-eradication plan that aimed to eliminate as many whitetails as possible in the impacted area. By completely ridding the area of deer, the hope was that the disease could be contained.

To say the effort was a failure is an understatement. Hunter pushback was high. Results were marginal. Today, Wisconsin’s CWD infection rate is at all-time highs in some areas. Hunter satisfaction, meanwhile, is at all-time lows.

CWD can not be cured, nor does it seem possible that it can be contained. Once discovered in an area, researchers have found no way to eliminate it. The disease is caused by a protein called a prion. These prions can “live” in the soil of an area and, once established, there seems to be no way of eliminating them. Ever. Researchers have tried all manner of methods, ranging from radiation treatment to intense temperature to chemicals. The prions remain, meaning even if all deer in the area are killed, any deer returned to the area would likely contract the disease again.

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To combat the latest outbeak of CWD, Michigan has implemented the following:

  • Established a Core CWD Area consisting of Alaiedon, Delhi, Lansing, Meridian, Wheatfield, and Williamstown townships in Ingham County; Bath and DeWitt townships in Clinton County; and Woodhull Township in Shiawassee County.
  • In this core area, unlimited antlerless permits will be available and mandatory deer check will be in place.
  • Restrictions will apply to the movement of carcasses and parts of deer taken in this area.
  • Created a CWD Management Zone that includes Clinton, Ingham, and Shiawassee counties.
  • A baiting and feeding ban is in place for both the Core CWD Area and the CWD Management Zone.
  • Prohibited the possession or salvage of deer killed by cars within the Core CWD Area, and residents are asked to report any road-killed deer to the DNR so that they can be tested for CWD.

It’s also likely that additional deer seasons will be added in both the CWD Core Area as well as the CWD Management Zone, including the early antlerless season in an effort to reduce deer numbers in the area.

A few months back, I contributed to a piece in Outdoor Life Magazine about the future of deer hunting. Disease, particularly CWD, played a prominent role in that. In a conversation with Dr. Grant Woods, he cited CWD as perhaps the greatest threat to deer and deer hunting.

“CWD is the disease that I have nightmares about,” Woods said. “In areas with CWD, no one can predict what will happen because we do not know. Once it’s there, it’s likely there forever. It seems like hunters in areas with CWD have learned to live with it. But we need to get it back on the front page. We are talking about a national treasure when talking about our whitetail population. And CWD is a very real risk to that treasure.”

It’s important to note that, thus far, the DNR has confirmed only this single case of CWD in free-ranging Michigan deer. There will be plenty more deer tested in the coming weeks as road-killed deer in the area are collected. The results of that testing will tell plenty about the future of deer hunting in southern Michigan.

Michigan is home to nearly one million deer hunters. With a hunting history that spans more than a century, and license sales consistently in the top five in the nation, it’s safe to say that Michigan is arguably the most deer-crazed state in the nation.

I live there. I hunt there. And CWD was just discovered in a free-ranging, wild deer less than 40 miles from where I hunt.

Whether I knew this day was coming or not, it’s here now. And all I can do is what thousands of Michigan hunters are now doing:

Waiting and hoping.


Michigan DNR Completes Latest Moose Population Survey

The Michigan Department of Natural Resources  announced the results of its 2015 moose population survey in the western moose range of the Upper Peninsula, an important tool in managing the species.

The 2015 population estimate in the western U.P. is 323, compared to an estimate of 451 in 2013. From 1997 to 2007, surveys of prime moose habitat in Baraga, Iron and Marquette counties suggested the U.P.’s moose population was growing at a modest rate of about 10 percent per year. From 2009 to 2013, survey results showed an apparent change in that trend, with the growth rate slowing to about 2 percent per year.

It would seem that a decline of more than 25% from 451 moose in 2013 to 323 in 2015 is more than just a trend and is in stark contrast to the “2% growth rate experienced from 2009 to 2013.” Something is obviously wrong to cause that kind of decline in a population.
The MDNR sites “Back-to-back severe winter weather that negatively affected moose condition, survival and reproductive success”, and “year-round climatic changes, especially warmer temperatures, that led to increased parasite loads on moose, weakening their overall condition.” The MDNR finally gets around to stating that “A possible increase in wolf predation on moose calves due to the region’s lowered deer population” may be a factor.”
Imagine that.
Moose                                                                                                                                                                Image by gnatoutdoors.com
Winters do not affect moose populations like deer. Moose have evolved over thousands of years with long legs to negotiate snow depths and reach ample browse. Moose thrive in Canada where winter conditions are more severe. Brain worm is one parasite that can affect moose survival, but has been present in the moose population since the beginning. One variable that has not been present is wolves. Wolf numbers have tripled in number in the UP in the last five years. The combination of serve winters and burgeoning wolf population has extirpated white-tailed deer from the western UP. Moose are next. 
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Chad Stewart, deer, elk and moose management specialist for the DNR said “However, coupled with survey records that show a decrease in the number of moose calves seen with cows this year, it’s quite possible that we’re looking at a considerable drop in numbers.”
Really? I doesn’t take a rocket scientist, or even a wildlife biologist, to figure that out.
“There is inherent uncertainty with any population survey, and due to the fact that the 2013 and 2015 estimates have some overlap in confidence intervals, the potential remains that the state’s moose population has remained steady rather than declining.”
Who are they trying to kid? I’m betting that by the time the next survey is done in 2017 that there are less than 200 moose left. 
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“Future surveys will be needed to identify any long-term trend for Michigan’s moose population. Other states and provinces have reported declines in moose populations near the southern edge of North America’s moose range, yet other populations are holding steady or increasing. Researchers in Michigan have hypothesized several potential causes for a possible decline of moose numbers in Michigan.” Among potential factors:

“The moose range in the western Upper Peninsula covers about 1,400 square miles. Every other year, DNR staff members survey most of that area from the air. In 2015, the flights covered all survey plots within the core moose area – where 80 to 90 percent of the western U.P. moose population is located – along with a sampling of the non-core plots as well.”

Ironic that the highest number of wolves also exist in the western Upper Peninsula.

“The survey is completed by flying transects over prime moose habitat to count moose seen from the air. The number counted is then extrapolated by a computerized population modeling program to attain the final estimate. The next moose population survey is planned for early 2017. However, given moose population trends, the DNR will again recommend to the Michigan Natural Resources Commission that there be no moose hunt in the state.”

For more information about moose in Michigan, visit www.michigan.gov/moose.

Contact: Chad Stewart, 517-282-4810 or Dean Beyer, 906-227-1627