extRiskRicker: Calculate a CDF of quasi-extinction risk for the Ricker model

In BruceKendall/PVA: Population viability analysis in R

Description

Calculate a CDF of quasi-extinction risk for the Ricker model

Usage

extRiskRicker(
  r,
  K,
  sigma2,
  time_horizon,
  N0,
  nsims = 1000,
  Nx = NULL,
  d = log(N0/Nx)
)

Arguments

r	the low-density growth rate
K	the equilibrium density
sigma2	the variance of the log growth rates
time_horizon	number of years to simulate
N0	initial population size
nsims	number of simulations
Nx	quasi-extinction threshold
d	the difference between log(N0) and log(Nx). Either specify d or specify Nx

Value

A data frame with columns Time and CDF Some error checking:

BruceKendall/PVA documentation built on Jan. 23, 2021, 2:56 a.m.