BIOL 2804 Lecture Notes - Lecture 8: Exponential Growth, Life Table, Inclusive Fitness
24 Dec 2019
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Objectives: births and deaths ultimately determine population growth rates, understand terminology, basic box and arrow diagrams, exponential growth. Population growth: processes that affect the numbers of individuals in a population, birth, death. Immigration: emigration, closed vs open population, growth = births deaths. Symbology t = time: n = population size, b = number of births, d = number of deaths, b = birth rate, d = death rate, delta = change. Births and deaths depend on population size it often makes more sense to describe births and death in terms of rates instead of absolute numbers: calculating per capita birth rate = births / n(0) Model of exponential population growth r = (b d) r = instantaneous per capita rate of growth. Exponential model assumptions: no i or e, constant b and d, no genetic structure that would influence b and d, no differences in b or d due to age or size structure, continuous growth with no time lags.
