详细书目
| 文件类型: | 文章 |
|---|---|
| 所有的著者/提供者: | A Schallenberger |
| OCLC号码: | 4434473801 |
| 语言注释: | English |
| 注意: | Abstract of item included in Wildlife management implications of petroleum exploration and development in wildland environments |
| 奖励: |
摘要:
It is concluded that available information indicates that impacts of oil and gas exploitation should be considered primarily detrimental for grizzly bears in northwestern Montana. Research has shown that grizzlies tend to react strongly to aircraft, especially helicopters. Marked animals previously captured by aircraft show the greatest reaction. Helicopter disturbance may cause den abandonment. Biologists suggest that road development has contributed to a decline in numbers of bears by accelerating habitat loss and increasing hunting and poaching pressure. Use of river valleys for transportation corridors, campsites, and other activities magnifies the effect of human presence by concentrating it in some of the most vulnerable and essential grizzly habitat. Bear-human conflicts may increase as a result of secondary development such as recreation, logging, livestock grazing, and construction of subdivisions.
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