BIOL 1001 Lecture Notes - Lecture 25: E Number, Life Table, Survivorship Curve
5 Apr 2018
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Document Summary
Species are limited by: biotic factors other species, abiotic factors sometimes related to dispersal abilities, historical factors evolutionary history. Demography is the study of the vital statistics (basically births and deaths details) of a population and how they change over time. Death rates and birth rates are of particular interest to demographers. Other factors are emigration and immigration rates. As for gene flow, this sense of immigration and emigration does not mean seasonal migration to cope with winter. A life table is an age-specific summary of the survival pattern of a population. It is best by following the fate of a cohort (all individuals in a particular age group) A life table summarizes the probability that in individual will survive and reproduce in any given year over its entire lifetime. Survivorship is a key component of a life table: the proportion of offspring produced that survive, on average, to a particular age.
