Life Tables and Survivorship Curves: Concepts and Construction
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7 Terms
Mortality, qx
The probability of dying between age x and x+1.
Survivorship, lx
The proportion of individuals surviving to age x.
Survival rate, sx
The proportion of individuals surviving from age x to age x+1.
Age-specific life expectancy, ex
The average number of additional years an individual of age x is expected to live.
Mortality Curve
A graphical representation of the mortality rates of a population over time.
Survivorship Curve
A graph that represents the number of individuals surviving at each age for a given species or cohort.
Type I, II, and III survivorship curves
Different patterns of survivorship that illustrate how mortality rates vary with age.
Note 
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