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Interpreting Evidence of Depredation of Duck Nests
in the Prairie Pothole Region

Appendix B, Table 1

Table 1. Distance (mm) between tips of both upper and lower canine teeth of principal mammalian carnivores of duck nests in the Prairie Pothole Region.a
  Females   Males
  Upper canines   Lower canines   Upper canines   Lower canines
Predator n GIF -- mean sign SD Range   n GIF -- mean sign SD Range   n GIF -- mean sign SD Range   n GIF -- mean sign SD Range
Coyote 12 30.2 2.0 27-33   6 27.7 1.5 26-29   10 31.2 3.2 24-35   6 26.0 3.3 22-30
Red fox 18 22.3 0.8 21-24   12 19.6 0.7 19-21   31 23.1 1.6 20-27   22 20.4 1.3 18-23
Raccoon 4 25.3 2.1 23-28   3 23.0 2.0 21-25   5 23.0 2.0 21-25   5 21.6 3.1 17-25
Stiped skunk 1 16.0       1 14.0       5 16.8 0.8 16-18   5 14.8 0.4 14-15
American badger 7 27.7 2.8 22-30   6 25.7 1.2 24-27   8 30.4 1.3 29-33   6 27.7 3.1 22-31
Mink 17 10.0 0.4 9-11   11 9.0 0.5 8-10   23 11.6 1.9 10-19   22 9.9 1.0 9-12
Ermine 4 4.5 0.0 4-5   6 4.1 0.2 4-5   27 5.5 0.6 4-7   29 4.8 0.5 3-6
Long-tailed weasel 7 7.8 1.0 6-9   6 6.0 0.6 5-7   8 8.4 0.6 7-9   4 6.9 0.9 6-8
a Measurements are from intact and partial skulls of adult-size individuals of indicated species and sex from the Prairie Pothole Region in cataloged collections at the Biology Department, University of North Dakota, Grand Forks; Department of Zoology, North Dakota State University, Fargo; and James Ford Bell Museum of Natural History, University of Minnesota, Minneapolis, July 1992.

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