Survivorship curve

A survivorship curve is a graph showing the number or proportion of individuals surviving to each age for a given species or group (e.g. males or females). Survivorship curves can be constructed for a given cohort (a group of individuals of roughly the same age) based on a life table.

There are three generalized types of survivorship curves:

The number or proportion of organisms surviving to any age is plotted on the y-axis, generally with a logarithmic scale starting with 1000 individuals, while their age, often as a proportion of maximum life span, is plotted on the x-axis.

In mathematical statistics, the survival function is one specific form of survivorship curve and plays a basic part in survival analysis.

Reece, Jane B.; Meyers, Noel; Urry, Lisa A.; Cain, Michael L.; Wasserman, Steven A.; Minorsky, Peter V.; Jackson, Robert B.; Cooke, Bernard N. (2012). Campbell Biology. Australian Version (9th ed.). Pearson. p. 1204. ISBN . 

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