Readings in Wildlife ConservationJames Allen Bailey, William Elder, Ted D. McKinney Wildlife Society, 1974 - Всего страниц: 722 |
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Стр. 173
... mortality factors seldom carry through long enough to affect appreciably the end products of our population equations . This , in particular , represents a departure from the Darwinian view . Instead of every agency of mortality each ...
... mortality factors seldom carry through long enough to affect appreciably the end products of our population equations . This , in particular , represents a departure from the Darwinian view . Instead of every agency of mortality each ...
Стр. 180
... mortality factor no increase in population results , the plot thickens . Such a situation can arise because of the effects of a phenomenon known as " compensation " ( Errington , 1946 ) . Compensation of mortality factors can be defined ...
... mortality factor no increase in population results , the plot thickens . Such a situation can arise because of the effects of a phenomenon known as " compensation " ( Errington , 1946 ) . Compensation of mortality factors can be defined ...
Стр. 217
... mortality which may be attributed to intrauterine derangements , faulty lactation , maternal be- haviour , or all of these from about the midpoint of the population growth ( Clarke 1955 , Crowcroft & Rowe 1957 , Christian 1961 , 1963a ) ...
... mortality which may be attributed to intrauterine derangements , faulty lactation , maternal be- haviour , or all of these from about the midpoint of the population growth ( Clarke 1955 , Crowcroft & Rowe 1957 , Christian 1961 , 1963a ) ...
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PERSPECTIVES | 1 |
Thinking like a mountain | 9 |
Lost margins in the abandoned farm | 19 |
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Readings in Wildlife Conservation James Allen Bailey,William Elder,Ted D. McKinney Просмотр фрагмента - 1974 |
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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