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

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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 they’re 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

Humbird Female

Luddington 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?


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