REM 311 Chapter Notes - Chapter 4: Leslie Matrix, First Age
17 Apr 2018
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Survival & fecundity describes growth of a population: average rates of all individuals in the population, assumes all individuals are identical, good for annual plants but not a correct assumption for many other species. 4. 3 an age-structured model for the helmeted honeyeater. Assume helmeted honeyeater starts breeding at age 1 & fertility doesn"t vary with age. First age class = zero year olds. Sx (t) = n x+1 (t+1) /nx (t) Fx = average number of offspring (per individual of age x) censused at the next time step. F(t) = offspring alive in t+1 / parents in t. F0 = 0 for this example as fecundity doesn"t start until age 1. To calculate fecundity for the reproductive age classes: divide number of 0 year olds in next year"s with total number of parents (1 year old +) in last years i. e. f (1992) = 27/55 = 0. 4909.
