BIOLOGY 3SS3 Lecture Notes - Fecundity

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17 Apr 2014
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What observations would you make about this life table: population will eventually increase by about 10% per year, decreasing numbers in older age groups, older age groups seem to be grouped or fecundity, survivorship: do we really believe nobody survives past the last year, maybe better to use a stage structured model keeping track of 1 year, 2 year, and adult not much harder. If r>1 the long( medium) term,the population will i ncrease l x f x x. It can be shown (by linear algebra) that an unregulated population following a constant table will: reach a stable age distribution: the proportion of individuals in each age group approaches a constant, eventually grow exponentially: increase by the same factor each time step. In an exponentially changing population, each year"s cohort is a factor of bigger (or smaller) than the previous one l x f x=1 x is the finite rate of increase, like before.

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