population.age.matrix.model: 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 a matrix computation. It's possible for this model. It's really more efficient and reduce computer time by 6! 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.matrix.model(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)

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

Value

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

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