predpreyRM {primer}

Rosenzweig-MacArthur Predator-prey Model

Description

An implementation of a predator-prey model, after Rosenzweig and MacArthur (1963). Includes prey density-dependence, and a type-II predator functional response. For use with ode in the deSolve package.

Usage

predpreyRM(t, y, p)

Arguments

t

Argument for time

y

A vector of length 2, for population 1 and 2

p

Vector or list of parameters

Value

Returns a list of length one, for use with ode in the deSolve package.

Component 1

vector of the state variables, y.

Author(s)

Hank Stevens <[e-mail]>

References

Rosenzweig, M.L. and MacArthur, R.H. (1963) Graphical representation and stability conditions of predator-prey interactions. The American Naturalist, 97, 209–223.

Stevens. M.H.H. (2009) A Primer of Ecology with R. Use R! Series. Springer.

See Also

predpreyLV

Examples

library(deSolve)
pars <- c(b = .8, e = 0.07, s = .2, w = 5, D = 400, alpha = 0.001)
Time <- 50
RM1 <- ode(c(900,120), 1:Time, predpreyRM, pars)
matplot(1:Time, RM1[,-1], type='l')