BIOLOGY 2F03 Chapter Notes - Chapter 11: Adolph Murie, Survivorship Curve, Life Table
22 Sep 2016
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Population structure: defined by a number of factors. Ex: patterns of mortality, age distributions, sex ratios and dispersal. Observations of interactions between wolves and sheep. Survivorship curve: summarizes patterns of survival in a population. Life tables: list the births, survivorship, and deaths (mortality) in populations. Survivorship curve: shows patterns of life and death within a population. Tell us if mortality rates for a given population change with age (linear vs curve) Sheep studied by murie & other large vertebrates: high rates of survival among young & middle-aged and high rates of mortality among older members. Seen in some plants and smaller vertebrates as well. Die at the same rate throughout life. Marine fish produce large number of young with high rates of mortality. After high mortality rate fairly constant mortality over remainder of life span. Type 1 survivorship curve: relatively high rate of survival among young and middle-aged individuals, followed by high rate of mortality.
