population.age.model.ode: The PopulationAge model (Population Dynamics with Age...

In ZeBook: Working with Dynamic Models for Agriculture and Environment

Description

Population Dynamics Model with Age Classes for an insect Exactly the same model as population.age.model, but written as an ordinary differential equation system (ode) with deSolve package. 7 states variables E : egg stage. homogenous population (density) (number per ha) L1 : larvae1 stage. homogenous population (density) (number per ha) L2 : larvae2 stage. homogenous population (density) (number per ha) L3 : larvae3 stage. homogenous population (density) (number per ha) L4 : larvae4 stage. homogenous population (density) (number per ha) P : pupae stage. homogenous population (density) (number per ha) A : adult stage. homogenous population (density) (number per ha)

Usage

population.age.model.ode(rb = 3.5, mE = 0.017, rE = 0.172,
  m1 = 0.06, r12 = 0.217, m2 = 0.032, r23 = 0.313, m3 = 0.022,
  r34 = 0.222, m4 = 0.02, r4P = 0.135, mP = 0.02, rPA = 0.099,
  mA = 0.027, iA = 0, duration = 100, dt = 1, method = "euler")

Arguments

rb	: eggs laid per adult per unit area (day-1)
mE	: relative mortality rate of egg (day-1)
rE	: eggs hatch (day-1)
m1	: relative mortality rate of larvae L1 (day-1)
r12	: relative rate L1->L2 (day-1)
m2	: relative mortality rate of larvae L2 (day-1)
r23	: relative rate L2->L3 (day-1)
m3	: relative mortality rate of larvae L3 (day-1)
r34	: relative rate L3->L4 (day-1)
m4	: relative mortality rate of larvae L4 (day-1)
r4P	: relative rate L4->P (day-1)
mP	: relative mortality rate of purpae (day-1)
rPA	: relative rate P->A (day-1)
mA	: relative mortality rate of adult L1 (day-1)
iA	: input rate of adult (unit.day-1)
duration	: simulation duration
dt	: time step for integration
method	: integration method (euler, rk4,...)

Value

data.frame with values for state variables for each time step.

ZeBook documentation built on May 1, 2019, 9:48 p.m.