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 |  |
SD | Range | n | |
SD | Range | n | |
SD | Range | n | |
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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