Northern Prairie Wildlife Research Center
TABLE 5: Causes of mortality, total days (Days) and number of mortalities (m) observed, estimated survival rates (^S)a, mortality rates (Rate), and dates of last cause-specific mortality (Date) of striped skunks by Group (sex with age classesb combined, or age class with sexes combined) in Stutsman County, North Dakota during April to June 1991 and April to July 1992.
| Total observed | Cause of mortality | ||||||||||||
| Rabiesc | Predationd | Other | |||||||||||
| Group | Days | m | ^S | (SE) | Rate | m | Date | Rate | m | Date | Rate | m | Date |
| 1991 | |||||||||||||
| Males | 63 | 0 | 1.000 | (0.000) | 0.000 | 0 | -- | 0.000 | 0 | -- | 0.000 | 0 | -- |
| Females | 64 | 2 | 0.720 | (0.120) | 0.000 | 0 | -- | 0.000 | 0 | -- | 0.280 | 2 | 1 June |
| 1b | 63 | 1 | 0.833 | (0.139) | 0.000 | 0 | -- | 0.000 | 0 | -- | 0.167 | 1 | 15 May |
| 2 | 64 | 0 | 1.000 | (0.000) | 0.000 | 0 | -- | 0.000 | 0 | -- | 0.000 | 0 | -- |
| Totale | 64 | 2 | 0.849 | (0.070) | 0.000 | 0 | -- | 0.000 | 0 | -- | 0.151 | 2 | 1 June |
| 1992 | |||||||||||||
| Males | 107 | 16 | 0.111 | (0.060) | 0.803 | 11 | 19 June | 0.281 | 4 | 10 June | 0.063 | 1 | 11 May |
| Females | 103 | 23 | 0.205 | (0.058) | 0.606 | 13 | 11 July | 0.241 | 5 | 19 June | 0.225 | 5 | 18 June |
| 1b | 106 | 6 | 0.080 | (0.054) | 0.583 | 3 | 7 July | 0.583 | 2 | 10 June | 0.200 | 1 | 14 May |
| 2 | 103 | 17 | 0.350 | (0.078) | 0.567 | 14 | 11 July | 0.091 | 2 | 19 June | 0.038 | 1 | 18 June |
| Total | 107 | 39 | 0.173 | (0.042) | 0.671 | 24 | 11 July | 0.290 | 9 | 19 June | 0.174 | 6 | 18 June |
| aKaplan-Meier survival estimates from staggered
entry design (Pollock et al., 1989). bAge class 1, <1 yr old; age class 2, ≥2 yr old. cDetermined by fluorescent antibody technique. dIncludes some animals that tested positive for rabies. eColumns do not sum to totals because ages were not estimated for all skunks. | |||||||||||||
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://www.npwrc.usgs.gov/resource/mammals/skunks/table5.htm
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