Wisconsin CWD rates continue to rise steadily

Discussion in 'Whitetail Deer Disease' started by Munsterlndr, Mar 22, 2016.

  1. Munsterlndr

    Munsterlndr Cereal Baiter Premium Member

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  2. d_rek

    d_rek

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    Is there any evidence that supports the 'hands-on, kill-em all' approach was working any better?
     

  3. Hillsdales Most Wanted

    Hillsdales Most Wanted

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    This thread is BS !!! Its gotten to the point in Wisconsin that most people only have their deer tested if it appeared sick, of course % will rise.
     
  4. Joe Archer

    Joe Archer Staff Member Mods

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    There is a lot of scientific evidence that should be used to look at methods to contain the disease.
    "Kill 'em all", probably wouldn't be a wise choice. As you attempt to kill all the deer in areas that CWD is discovered - it likely spreads to other areas. I think the published data suggests reducing populations, AND limiting buck age structure is the best methodology for containment. If you do that in positive areas, and SURROUNDING locations, you can likely maintain a huntable population for generations to come AND, limit the spread of CWD.
    <----<<<
     
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  5. d_rek

    d_rek

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    Best relative to what though? The rate was steadily on the rise before they took a hands-off approach - although the statistics reported in the article suggest they nearly doubled over a year even though there was a smaller sample size for deer tested.

    FYI I am not advocating for either approach. I personally think that DNR agencies are facing a lot of highly variable challenges when it comes to controlling CWD, and that there simply isn't a 'one-size-fits-all' approach to CWD prevention.
     
  6. Joe Archer

    Joe Archer Staff Member Mods

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    Best relative to "hands off" and attempts at deer/disease eradication in the core...
    <----<<<
     
  7. Lumberman

    Lumberman Premium Member

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    Zero evidence.
     
  8. swampbuck

    swampbuck

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    If this is ever confirmed in one human, it's game over. And before anyone says it won't.....well neither could it's brother BSE at one time.

    Might be a good time to focus on disease control instead of antlers.
     
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  9. twodogsphil

    twodogsphil

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    [
    Follow Illinois, not Wisconsin, to slow spreading CWD
    [​IMG] Paul A. Smith
    Outdoors Editor
    Aug. 19, 2015

    As chronic wasting disease continues its spread in white-tailed deer across the state and continent, two things are becoming clear: First, if you're a Wisconsin hunter, your odds of killing a CWD-positive deer are steadily increasing. And second, when natural resource agencies consider strategies to deal with CWD discoveries in their states, the example provided by Illinois — not Wisconsin — is the top choice.

    Data from the last year show the prevalence of CWD in Illinois has remained relatively low and stable, at slightly more than 1%, while in Wisconsin, the disease has continued to increase to about 6%. The states share a border but not CWD management strategies. Since the disease was discovered in both states in 2002, the Illinois Department of Natural Resources has worked to decrease deer numbers in areas CWD is present. The effort has included sharpshooters and increased hunting permits. Although the Wisconsin DNR initially attempted to eradicate the disease with aggressive measures, including sharpshooters and longer hunting seasons, it now uses only monitoring and surveillance. Rates of the disease have increased substantially since Wisconsin abandoned targeted deer reduction efforts.

    The difference in CWD prevalance rates in the two states is due mostly to management strategy, according to University of Illinois researchers Jan Novakofski and Michelle Green. The pair published a 2013 paper titled, "The Importance of Localized Culling in Stabilizing Chronic Wasting Disease Prevalence in White-Tailed Deer Populations" in Preventive Veterinary Medicine. Novakofski said after Wisconsin officials changed their strategy, the CWD prevalence rates increased and are still increasing. Meanwhile, Illinois has remained committed to reducing deer in areas with known CWD-positive animals. The IDNR also is testing deer for CWD in a wide area, hoping to find any new disease sites.

    For the sampling year ending June 30, the CWD prevalence rate in Illinois was 1.2%, according to Paul Shelton, forest wildlife manager for the Illinois Department of Natural Resources. "This is a very challenging issue," Shelton said. "We can't declare victory, but we can say that the work we've been doing has helped keep the rates lower than they otherwise would be."

    Chronic wasting disease is a spongiform encephalopathy similar to mad cow disease and scrapie. It is caused by an abnormal prion and can take years to develop but is always fatal. It was first discovered in captive mule deer in Wyoming in the 1960s and has since spread to at least 22 states.
    Much has been learned in recent years about prion diseases. In the case of CWD, it is now known the prion is found in muscle tissue as well as plants.

    The disease is contagious and found in deer, elk and moose. It has not been linked to human disease, but the Centers for Disease Control and Prevention recommends not eating the meat from CWD-positive animals. The Wisconsin Division of Public Health recommends that venison from deer harvested from CWD affected areas not be consumed or distributed until test results are negative.

    As the disease continues to spread in Wisconsin, more hunters will have to confront decisions about testing. "I know it's coming," said Ralph Fritsch, 69, of Townsend, who hunts deer in Oconto County and has served on wildlife panels for the Wisconsin Wildlife Federation and Wisconsin Conservation Congress. "Maybe not in my lifetime, but it's coming. It concerns me, absolutely. I wish there was more being done to prevent its spread in Wisconsin." This year marks an unhappy milestone in Wisconsin's CWD history. For the first time, more than half of the state — 38 counties — is classified as "CWD-affected" going into the fall hunting season. Baiting and feeding of deer is prohibited in the 38 counties.

    Among all deer sampled statewide in Wisconsin in 2014, 331 of 5,460 tested positive for CWD, for a prevalence rate of 6%. But the rates are much higher in areas where the disease has been detected for more than a decade. Since 2002, CWD prevalence in the DNR's western monitoring area has shown an overall increasing trend in all sex and age classes, according to the agency. During the past 13 years, prevalence in adult males has risen from 8% to 10% to over 25% and in adult females from about 3 to 4% to more than 10%. During that same time, CWD rates in yearling males have increased from 2% to 8% and in yearling females from 2% to 7%, according to DNR statistics.

    In an area of Iowa County, near the site the disease was discovered in 2002 in Wisconsin, the CWD-positive rate of adult male deer is nearly 40%. As new CWD "sparks" are found in wild deer or at captive facilities — an Eau Claire County deer farm is the most recent to have a CWD-positive animal — the disease is no longer a local or regional issue.

    The experiences of Wisconsin and Illinois over the last 13 years are informing resource managers in other states. The success at keeping prevalence rates relatively low and stable in Illinois have impressed wildlife biologists across the nation. "You've got to admire Illinois' commitment to it," said Chad Stewart, deer management specialist for the Michigan Department of Natural Resources. Chronic wasting disease was detected at a captive facility in Michigan in 2008. And this year, the first wild deer in Michigan with CWD were found in a suburb of East Lansing. The response? Michigan officials are using sharpshooters to cull deer in the area, as well as issuing more permits to hunters and landowners. They are performing CWD tests on all deer killed in the reduction effort as well as car-killed deer in the vicinity.

    "This is as complex a management issue as you're likely to find," said Shelton of the Illinois DNR. "It requires working with landowners, hunters, legislators and others. But if we're going to have a chance at some level of success, we've decided to keep on this path.
     
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  10. Munsterlndr

    Munsterlndr Cereal Baiter Premium Member

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    A hands on approach is working better in other states, see Illinois.
     
  11. motdean

    motdean

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    I get the sense that no matter the subject, some people are always going to look at a person's stance on APR's and then simply object to anything that they post.

    I wonder what the position of those same individuals will be when CWD reaches the NW13 and APR's are cancelled......

    Munster, thanks for posting...
     
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  12. motdean

    motdean

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    From the article that Munster posted:
    (Note especially the 3.5 year old bucks...sample size is fairly significant....IMO)

    upload_2016-3-22_19-35-11.png
     
  13. Lumberman

    Lumberman Premium Member

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    Not true at all. I agreed with Munster in the last thread.

    The choice is between 0 deer with 0 chance of disease or some deer with a chance of disease. The choice for me is easy. Nothing to do with APRs.
     
  14. Munsterlndr

    Munsterlndr Cereal Baiter Premium Member

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    Maybe some posters that display those results graphically should be displayed at the upcoming Deer Summit meeting in Mt. Pleasant........:chillin:

    [​IMG]
     
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  15. Munsterlndr

    Munsterlndr Cereal Baiter Premium Member

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    That's really not the choice, though.

    The realistic choice is between a herd with unbalanced sex ratios, weighted towards does and with a young buck age structure vs. a herd with balanced sex ratios with an advanced buck age structure.

    The first herd is going to have a lower overall prevalence rate and will help to slow the geographic spread of the disease. The second will result in higher overall prevalence rates and will facilitate the spread of the disease outside of core areas.

    Unless your only consideration is the potential for bagging bucks with big antlers, it really should not be much of a mental struggle to decide which choice is better for both the resource and the future of hunting.