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 74
Стр. 648
... production on Douglas- fir sites in north Idaho was reached in 10 to 15 years after logging . He studied both burned and unburned logging sites . He noted : " After burning , the site is dominated for two to five years by herbaceous ...
... production on Douglas- fir sites in north Idaho was reached in 10 to 15 years after logging . He studied both burned and unburned logging sites . He noted : " After burning , the site is dominated for two to five years by herbaceous ...
Стр. 672
... produce a dome - shaped net- population - production or yield curve ( Fig . 2B ) . At lowest densities , net production per unit of breeding stock is maximum , but the net number of animals produced by the population is small because ...
... produce a dome - shaped net- population - production or yield curve ( Fig . 2B ) . At lowest densities , net production per unit of breeding stock is maximum , but the net number of animals produced by the population is small because ...
Стр. 689
... production is more clearly a function of the primary production of a system than is game pro- duction . A fourth reason may lie in possible differences in the pattern of popu- lation regulation between fish , on the one hand , and birds ...
... production is more clearly a function of the primary production of a system than is game pro- duction . A fourth reason may lie in possible differences in the pattern of popu- lation regulation between fish , on the one hand , and birds ...
Содержание
PERSPECTIVES | 1 |
Thinking like a mountain | 9 |
Lost margins in the abandoned farm | 19 |
Авторские права | |
Не показаны другие разделы: 33
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 animals annual areas Barbary sheep behavior big game biological biologists birds black-tailed deer breeding burning Canada Canada geese caribou carrying capacity changes chaparral conservation cost crop Dall sheep diversity ecological economic ecosystem effects environment example exotic experience factors farm fertility Fish and Game fish and wildlife forage forest game management geese goose groups grouse growth habitat harvest herd 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 quail recreation refuge reproductive result ruffed grouse season seed sharecropping shrubland social soil species sport square miles succession territory tion types ungulates unit vegetation waterfowl white-tailed deer wild Wildl wildlife management wildlife resources winter range wolf wolves