suitability: Prey suitability

In bthe/rgadget: Tools to Create and Maintain Gadget Models

Prey suitability

Description

The suitability function for predation used in the R model is:

S_{pred,prey}(L,l) = \frac{delta}{1+e^{-alpha-beta l-gamma L}}

With one predator, one prey and otherfood the equation becomes:

C_{L,l}=N_{L}M_{L}Ψ_{L}\frac{F_{L,l}}{∑_lF_{L,l}+OA}

=N_{L}M_{L}\frac{F_{L,l}}{∑_lF_{L,l}+OA+HA}

where $O$ is the density of otherfood.

Usage

suitability(
  params,
  l,
  L = c(0),
  type = "exponential",
  to.data.frame = FALSE,
  normalize = FALSE
)

Arguments

params	suitability paramters
l	prey length group(s)
L	predator length group(s)
type	suitability function
to.data.frame	Logical, return a data.frame instead of an array
normalize	Logical, should the output be normalized

Value

matrix of suitabilities, columns prey length, lines predator length

bthe/rgadget documentation built on July 22, 2022, 7:24 a.m.