Life history tables - cx= nx Sums (N) 200.00 300.00 380.00...

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Calulating Life History Tables Table 1a: Hypothetical life table to a population Age lx mx px qx lxmx px= l(x+1) 0.00 1.00 0.00 0.50 0.50 0.00 lx 1.00 0.50 2.00 0.40 0.60 1.00 2.00 0.20 1.00 0.50 0.50 0.20 qx= 1-px 3.00 0.10 1.00 0.00 1.00 0.10 4.00 0.00 0.00 GRR: 4.00 Ro/NRR: 1.30 Table 1b: Projected population growth based on life history from Table 1a and starting with 200 individuals in age class zero (newborn) Age nx at t=0 cx at t=0 nx at t=1 cx at t=1 nx at t=2 cx at t=2 nx at t=3 cx at t=3 nx at t=0: 200*lx0 0.00 200.00 1.00 200.00 0.67 240.00 0.63 300.00 0.63 nx1 at t=1: nx0 at t=0*px0 1.00 0.00 0.00 100.00 0.33 100.00 0.26 120.00 0.25 nx0 at t=1: nx1 at t=1*mx1 2.00 0.00 0.00 0.00 0.00 40.00 0.11 40.00 0.08 ***remember to include fertility for 3.00 0.00 0.00 0.00 0.00 0.00 0.00 20.00 0.04 all age classes for nx0 4.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
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Unformatted text preview: cx= nx Sums (N) 200.00 300.00 380.00 480.00 N Table 1c: Calculate the stable age distribution (SAD) based on above two tables and estimated value of r Age (x) xlxmx G r lxe^(-rx) Cx 0.00 0.00 1.00 0.63 G= xlxmx Cx= lxe^(-rx) 1.00 1.00 0.41 0.26 Ro lxe^(-rx) 2.00 0.40 1.31 0.20 0.13 0.08 3.00 0.30 0.05 0.03 r= ln(Ro) 4.00 0.00 0.00 0.00 G Sums: 1.70 1.60 1.00 (increase r to decrease the value) = N(t+1) r= ln(avg ) ***Remember to check in Euler equation*** Nt *** Cx must always = ***Must verify r in Euler equation: lxmxe^(-rx)=1. If estimated value of doesn't check, use trial and error to adjust.*** ***Can also estimate r from . r *** 1***...
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Life history tables - cx= nx Sums (N) 200.00 300.00 380.00...

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