https://www.google.com/url?rct=j&sa=t&url=http://www.duluthnewstribune.com/news/3933459-diseases-health-problems-killing-minnesota-moose&ct=ga&cd=CAEYAioSNjcxNzYwNDY3MDE0Mzc1MDM1MhozYmI1NzAwZGJhNGVlNTJkOmNvbTplbjpVUw&usg=AFQjCNHAmuHorTIDseM0DkFNKD3WT_8lcw
Preliminary results from 47 of the adult moose
Parasites, health problems killing Minnesota moose
After 3 years of monitoring the Minn.
Moose herd,
Moose herd,
Minnesota wildlife researchers say they are getting
a better understanding of what's killing the stae's
a better understanding of what's killing the stae's
Preliminary results from 47 of the adult moose
captured and collared during the past three years
show that two-thirds died from health-related
causes including brainworm, winter ticks, bacterial
infections, liver flukes and severe undernutrition,
DelGiudice reported. Wolves killed one-third of
those moose but sickness in 25 percent of those
years and done a good job of answering a lot of
the unknowns we had from some earlier moose
studies and what the causes of mortality are,"
said Mike Schrage, wildlife biologist for the
Fond du Lac Band of Lake Superior Chippewa,
which has been involved in much of Minnesota's
moose research. "I think they've done a good
job of getting at some of the interplay between
health issues and wolf predation."
Of particular interest is how winter nutrition in
moose affects their health, DelGiudice said.
When moose are heat-stressed in winter they
aren't getting enough food and eventually
heat stress index of moose is tracking very closely
with the severity of winter nutrition of these
moose. What it's saying is that winter nutrition
could be a key to this."
That information is based on moose urine samples
the DNR has gathered from the snowpack, DelGiudice
said.
In summer, he said, moose can go to ponds or streams
to cool down when they get too warm. In winter, moose
can only lie in the snow and shade, which offers less
cooling, DelGiudice said. When air temperatures
reach 23 degrees in winter, he said, moose can
begin to experience heat stress, increasing their
metabolism, heart rates and respiration.
"If the effects of climate change are negatively
affecting the nutrition of moose in winter, it
could clearly make them compromised and more
vulnerable to disease and other things," he said.
Fond du Lac's Schrage finds the correlation
between winter temperature and moose nutrition
significant.
"We've been saying for a number of years that we've
previously found relationships between warm
temperatures, particularly in winter, and subsequent
moose mortality," Schrage said. "Glenn's work would
appear to back that up and show how that happens."
Data that DNR researchers have collected to date is
far from conclusive, DelGiudice said.
"Only more data on moose deaths collected over
a longer period of time will determine whether
the trends researchers are seeing continue," the
DNR's moose update on its website stated.
DelGiudice said a minimum of six years of data
will be necessary for a valid study.
"But we know we can't wait to start making some
preliminary recommendations after three years
of preliminary findings," DelGiudice said.
Moose for the most part disappeared from
Northwestern MInnesota in the 1990s and
their numbers have been crashing in the
In Northeastern Minnesota, moose numbers
have dropped from about 8,500 moose as
recently as 2006 to about 3,500 last year.
The results of this winter's annual aerial
survey of moose areas will be released in
coming months.
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