PopMod_Gomp: Gompertz population model - harvest before density dependent...

In ErlendNilsen/MSEtools: A collection of tools used when building (generalized) MSE models

Description

A gompertz-type population model, including the possibility for harvest. Harvest is applied as a pulse removing a pre-determined number of individuals. After harvest the (model) population grows according to the parameters in the model.

Usage

PopMod_Gomp(X_t0 = 100, sigma2_e = 0.2, N_Harv = 20, K = 200,
  r_max = 1)

Arguments

X_t0	Population size (X) at time t=0 (i.e. at the time step before the function applies)
sigma2_e	environmental stochasticity
N_Harv	Number of individuals harvested (in year t0)
K	Carrying capacity of the theta-logistic model
r_max	Maximum growth rate (i.e. intrinsic growth rate)

Value

Data frame containing the following columns:

eps: Value of the stochastic component in year t

X_star Post-harvest population size

X_t1 Population size (X) in year t=1

lam Population growth rate (lambda) in year t

ErlendNilsen/MSEtools documentation built on May 6, 2019, 4:03 p.m.