eq24_make_gamma_vec: Equation 24: Make relative competitivness parameters for...

In brouwern/FACavian: An R implementation and extension of full-annual cycle (FAC) model of Runge & Marra *2005)

Equation 24: Make relative competitivness parameters for winter habitat acquition

Description

Competitive ability depends on "an intrsince age-,sex- and condition(habitat)-specific competitive factor gamma and the number of birds in each class" (Runge and Mara, 2004; page 380, column 2). THis function calculates gammas for each class of birds based on gamma.base provided in function call. Currently competitiveness for winter habitat is primarily determined by age and the habitat a bird originated (source vs. sink). Changing gamma.base decreases the competitiveness of females relative to males.

Usage

eq24_make_gamma_vec(gamma.base = 2)

Arguments

gamma.base

Base competition value of females relative to males. Higher values make females LESS competitive.

Details

Note: breeding K is based on pairs,winter K is based on individuals.

Value

gamma.i Vector of competiveness values for each class of birds

Examples

# Default relative competitiveness is that males = females
gamma.1 <- eq24_make_gamma_vec()

# Make females more competitive than males
gamma.1.2 <- eq24_make_gamma_vec(gamma.base = 1.2)

data.frame(gamma.1, gamma.1.2)

brouwern/FACavian documentation built on June 1, 2024, 10:32 p.m.