Readings in Wildlife ConservationJames Allen Bailey, William Elder, Ted D. McKinney Wildlife Society, 1974 - Всего страниц: 722 |
Результаты поиска по книге
Результаты 1 – 3 из 42
Стр. 183
... wolf numbers were reduced other factors might compensate for predation and bring about the same number of deaths as formerly caused by wolves . Nevertheless , both methods furnish insight into the effect of wolf predation on prey ...
... wolf numbers were reduced other factors might compensate for predation and bring about the same number of deaths as formerly caused by wolves . Nevertheless , both methods furnish insight into the effect of wolf predation on prey ...
Стр. 185
... wolves ' main prey is the black - tailed deer . Klein and Olson ( 1960 ) , without giving documenta- tion , stated that on wolf - free islands in that area overpopulation of deer was evident , whereas on wolf - inhabited islands winter ...
... wolves ' main prey is the black - tailed deer . Klein and Olson ( 1960 ) , without giving documenta- tion , stated that on wolf - free islands in that area overpopulation of deer was evident , whereas on wolf - inhabited islands winter ...
Стр. 186
... wolf - inhabited and wolf - free areas . At just the lower deer density , the prey - predator ratio was about 350 deer ( or 52,500 pounds ) per wolf . A third study from which the conclusion was drawn that wolves were not controlling ...
... wolf - inhabited and wolf - free areas . At just the lower deer density , the prey - predator ratio was about 350 deer ( or 52,500 pounds ) per wolf . A third study from which the conclusion was drawn that wolves were not controlling ...
Содержание
PERSPECTIVES | 1 |
Thinking like a mountain | 9 |
Lost margins in the abandoned farm | 19 |
Авторские права | |
Не показаны другие разделы: 32
Другие издания - Просмотреть все
Readings in Wildlife Conservation James Allen Bailey,William Elder,Ted D. McKinney Просмотр фрагмента - 1974 |
Часто встречающиеся слова и выражения
acres adult agencies Aldo Leopold animals annual areas Barbary sheep behavior big game biological biologists birds black-tailed deer breeding burning Canada geese caribou carrying capacity changes chaparral conservation crop Dall sheep ducks ecological economic ecosystem effects environment example exotic experience factors farm fawns fertility Fish and Game fish and wildlife forage forest goose groups grouse growth habitat harvest herd Horicon hunters hunting important increase individual kill land Leopold limited living mallards marshes ment method Mississippi Flyway moose mortality muskrats National Park natural organic Park Service percent plants population density prairie predation problem production public relations quail ratio recreation refuge reproductive result ruffed grouse season seed sharecropping shrubland social soil species sport square miles succession territory tion types ungulates vegetation waterfowl white-tailed deer wild Wildl wildlife management wildlife resources wolf wolves