 | United States. Congress. Senate. Committee on Appropriations - 1967 - 172 halaman
...The effort to protect large predators in and around the parks should be greatly intensified. At the same time, it must be recognized that predation alone...seldom be relied upon to control ungulate numbers, particularly the larger species such as bison, moose, elk, and deer ; additional artificial controls... | |
 | J. Baird Callicott, Michael P. Nelson - 1998 - 716 halaman
...The effort to protect large predators in and around the parks should be greatly intensified. At the same time, it must be recognized that predation alone...seldom be relied upon to control ungulate numbers, particularly the larger species such as bison, moose, elk, and deer; additional artificial controls... | |
 | Paul Schullery - 2003 - 380 halaman
...The effort to protect large predators in and around the parks should be greatly intensified. At the same time, it must be recognized that predation alone...seldom be relied upon to control ungulate numbers, particularly the larger species such as bison, moose, elk, and deer; additional artificial controls... | |
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... agencies of Federal and local governments for the maintenance of buffer zones around the parks where predators are not subject to systematic control, these negotiations have been only partially successful. The effort to protect large predators in... 