 Ricker model

The Ricker model, named after Bill Ricker, is a classic discrete population model which gives the expected number "N" "t"+1 (or density) of individuals in generation "t" + 1 as a function of the number of individuals in the previous generation,

Here "r" is interpreted as an intrinsic growth rate and "k" as the carrying capacity of the environment.The Ricker model was introduced in 1954 by Ricker in the context of stock and recruitment in fisheries.