Black

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Black
Bear
Reintroduction
Project
2000-2001
Matt Schroeder, Trinia Bergman, and Joe
Sudbrink Augusta HS
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• Over the past six years the DNR has been trying
  to reintroduce orphan bear cubs found around the
  state.

• When orphans are found theyre taken to the
  Mackenzie Center were they can be raised in
  isolation.

• They are reintroduced into the Eau Claire County
  forest.

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• Local Schools have been involved in tracking the
  bears for six years.

• To find out if they establish normal patterns and
  stay away from humans.

• This year our job was to track them and map their
  locations, calculate ranges and habitat use.

• Then we analyzed the information and made home
  range maps and charts on there habitat use.

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We track the bears using radio telemetry as soon
as they come out of their den in spring until
they den in the winter.
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We get a good location on the bear by taking
three different readings. Wherever they intersect
is the bears location.
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Accuracy test

• How accurate are the bear locations we map
  compared to the exact location of the bear?

• We put six collars out at field research station.

• We used our telemetry to map the collars like we
  would a bear.

• We plugged our points into ArcView and measured
  the distances from our points to the exact
  locations of the collars.

• On the average we were accurate to within .25
  miles of the true locations.

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ArcView was used to measure distances between
real and telemetry locations.
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Bear Radio-Telemetry Data Analysis
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• We plot our data using ArcView and calculate home
  ranges using the Animal Movement Analysis
  extension from Alaskan Fish and Wildlife.

• The Animal Movement Analyst is used as an Arc
  View extension. Arc View is the most widely used
  GIS throughout the world.

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The harmonic mean home range method is a
technique that is especially useful in
determining animal activity centers.
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Minimum Convex Polygon analysis gives you the
minimum total range of the bear data.
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Kernal Home Range

• The 95 Contours are the area the animal actually
  uses.
• The 50 contours are considered the core area of
  animal activity.
• Comparisons between animals are best done using
  the 50 contour data.

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Analyzing Bear Locations by Vegetation Type
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Using ArcView and the Wisconsin Vegetation Data,
we analyze each bear location for vegetation type.
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Zoom in to each data point and use the identify
tool to classify vegetation for each point
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The results show the vegetation type at a minimum
of 5 acre blocks
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Percentage of Data Points in Various
Vegetation Categories -
Coon Fork Bear
32
8
8
32
24
8
4
6
2
2
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Percentage of Data Points in
Various Vegetation

Categories- Humbird Bear
2
6
5
35
5
8
1
2
3
17
16
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Percentage of Data Points in Various Vegetation
Categories
Horse Creek Bear
2
2
5
25
2
18
7
5
34
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Percentage of Data Points in Various Vegetation
Categories - Ludington Bear
3
3
8
3
5
5

5
65
65
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Bear Locations by Vegetation Type and Time of
Year
Luddington Female
Humbird Female
Humbird Female
3/99-6/3/99 6/4/99-8/3/99 8/99
9/99-12/99
3/00-6/3/00 6/4/00-8/3/00 8/00
9/99-12/00
Coonfork Male
Horsecreek Female
3/99-6/3/99 6/4/99-8/3/99 8/99
9/99-12/99
3/00-6/3/00 6/4/00-8/3/00 8/00 9/00-12/00
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When the bears come out of their dens in the
spring, we want to track them right away, and
keep tracking them until they den next winter.
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Any Questions?