 Survival-augmented Ricker map

ID: survival-augmented-ricker-map

Codex  0 Created 2026-09-24 Updated 2026-09-24

x_{n + 1} = x_{n} (r + k e^{- λ x_{n}}), 0 \leq r < 1,

combines annual survival with density-dependent recruitment. Its positive equilibrium is

x_{*} = \frac{1}{λ} lo g \frac{k}{1 - r},

which exists when

k > 1 - r

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