Lecture 18 Populationsbb

Lecture 18 Populationsbb - Population Ecology Controlling...

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Population Ecology
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Controlling Numbers
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Applied Population Ecology Peregrine Falcons , 1970’s
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Sometimes we are too late . . . Golden frog, 2008 Chytridiomycosis
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Endangered Species Act – off the list Grizzly Bear, 2007
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Gray Wolves, 2008
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Pacific Northwest clearcuts Spotted owl Endangered Species Act – on the list
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Sustainable Harvesting of our resources Minke Whale 700,000 left Endangered Fin Whale 33,000 left Whaling in Iceland, 2006
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Fish Industry sardines Atlantic salmon
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Demography Births/Fecundity Deaths/Survivorship
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Defining Individuals
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Unitary organisms, Determinate
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Modular organism, Indeterminate duckweed coral Repeated production of modules
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Clones
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Counting Individuals (e.g. rabbits)
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Sampling Aphid population
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Mark and Recapture
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More Elusive Animals Blue Whale 1000-5000 Snow Leopard 3000-7000
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Population Dynamics
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Linear (geometric/exponential) 0 500 1000 1500 2000 2500 3000 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 ΔN/ Δ t = r max N
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Model Fecundity and death rates constant? Density dependence?
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This note was uploaded on 10/22/2009 for the course BIO 124 taught by Professor Griscom during the Spring '07 term at James Madison University.

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Lecture 18 Populationsbb - Population Ecology Controlling...

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