BIOLOGY 1M03 Lecture Notes - Lecture 30: Quadrat, Population Connection, Exponential Growth
29 Mar 2017
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Ecology: population ecology, mark recapture, discrete & continuous population growth. Count, or estimate by aerial counts of large organism, especially in migration or in nesting colonies. Mark release calculation n1 is the number caught and marked in first capture. M2 is the number marked individuals caught in 2nd capture n2 is the number of total individuals caught in 2nd capture. N is the estimate of the total population size (solve for this) In the example above: m2/n2 = n1/n, 50/300 = 100/n, n = 600. Assuming no immigration or emigration dn/dt = (b-d)(n) N = number individuals at current time. E. g. , n=5000, b=20 births/1000 ind*yr, d=10 deaths/1000 ind*yr. Dt = 1 year dn/dt = [(20-10)/1000*1yr] x 5000 dn/dt = +50. B = d dn/dt = 0 (zpg zero population growth) Substitute r for b d r is the per capita growth rate dn/dt = rn.
