Hull CompLab3_ECL242 Feb 17, 2010

Hull CompLab3_ECL242 Feb 17, 2010 - How do we know what we...

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How do we know what we know?
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New Rules: There are two species Adult harlani have highly variable tails that always differ from other Red-tails Color: white, pale gray, medium to dark gray, rufous or some mix Irregular dark mottling and grizzling Irregular variable-width dark banding Subterminal band vague, dusky, crisp, variable-width
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Running STRUCTURE Data format Importing data file Creating parameter set
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Q plots
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K plots Average the ln Pr (X|K) values across runs for a given K Plot K values with standard deviation
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K = 1-5, 100,000 burn-in, 1,000,000 reps -29300 -29250 -29200 -29150 -29100 -29050 -29000 1 2 3 4 5 K Log Pr(X|K)
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Evanno et al. 2005 Calculate the second derivative of K (delta K) Graph – peak value is “correct” Cited extensively Still may be subjective Apparently less accurate than estimating by eye
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Branta hutchinsonii
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Branta hutchinsonii K
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Hull CompLab3_ECL242 Feb 17, 2010 - How do we know what we...

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