L14. Wildless Management

L14. Wildless Management - n Wildlife ecology and Human...

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Economics of Wildlife Management n Wildlife ecology and Human Institutions q Important to know the growth dynamics of wildlife population q Population increases or decreases depending on n Food availability n Fertility and Mortality n Predation pressures q Arthur Einarsen studied population of Pheasants n Species was introduced onto an island where they did not exist before n Population increases were modest initially (near 1936) n Increases were at a maximum in 1941 n Population reached its maximum in 1946 q This maximum is also called carrying capacity
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Growth of a Pheasant Population 1936 1940 1942 1944 1946 1938 600 1200 1800 2400 3000 Number of Pheasants 1400 2600 Annual Increment in Number of Pheasants Logistic Growth Curve
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The Logistic Growth Curve n Inverted U shaped n Annual increment with small population is small n Reaches max at 1400 n Drops to zero at 2600 n 1400 is stock that gives Maximum Sustainable Yield n 2600 is ?? n Logistic Model first proposed by P. F Verhulst (1938) Number of Pheasants 1400 2600 Annual Increment in Number of Pheasants Logistic Growth Curve
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The Economics of Sport Hunting n 1996 there were 39.7 million participants in sport hunting and fishing activities q Fresh water fishing was largest q Big game hunting next n
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