AN INDEX OF WINTER WEATHER SEVERITY FOR NORTHERN DEER1

摘要: The relative severity of winter climate for white-tailed deer (Odocoileus virginianus) can be determined by using rather simple and inexpensive equipment to measure the principal stressors, air chill snow hazard. A rating is derived with a specially designed chillometer described in this report. Depth pack its supporting quality, obtained compaction gauge, yield snow's hazard rating. Respective ratings are summed compute weekly index. cumulative total these values constitutes seasonal score. Trials system Michigan's Upper Peninsula indicate that it provides reliable means judging physical welfare yarded deer; hence, their probable mortality rate predicted through inspec- tion collected data as progresses. Moderate heavy losses occurred during winters which season's index exceeded value 100 among various stations across peninsula.