Reproductive value (population genetics)
Fisher's reproductive value was defined by R. A. Fisher in his 1930 book The Genetical Theory of Natural Selection as the expected reproduction of an individual from their current age onward, given that they have survived to their current age. It is used in describing populations with age structure.
Consider a species with a life history table with survival and reproductive parameters given by and , where
- = probability of surviving from age 0 to age
- = average number of offspring produced by an individual of age
Depending on whether the breeding is discrete or continuous, Fisher's reproductive value is calculated as
the net reproductive rate of the population.
The average age of a reproducing adult is the generation time and is
Fisher, R. A. (1930) The Genetical Theory of Natural Selection. Oxford University Press, Oxford.