future.host: future events table for species simulation

In byandell/ewing: Ewing's Quantitative Population Ethology

future events table for species simulation

Description

Contains life history events for QPE simulation. These are normally internalized via init.simulation.

Format

Data frame with one row per stage, except in the case of competing risks. Time is in appropriate units for species as set in organism.features.

current

current stage

future

potential future event

fid

future event ID, corresponds to row when this is current stage

time

mean time to future event

pch

plot character

color

plot color

ageclass

class of stage (see organism.features

event

event class

init

current stage weighting for initialization

Details

This sets out how an individual in a species will progress from 'current' to 'future' stage when its event time is at the top of the event leftist tree queue. The 'fid' points to the row in this table corresponding to the 'future' stage, which would then become the 'current' stage. The code uses numeric 'fid' because it ends up in a vector of other numeric values.

Note that sometimes there are multiple rows with the same 'current' value, which are competing risks. For instance 'future.host' has competing risks from the 'current' stage 'second.3' of becoming 'female' or 'male', while 'future.parasite' has competing risk from the current stage 'adult' to 'feed' or 'ovip'osit, with return lines from 'feed' and 'ovip' to 'adult'. That is, an adult parasite might feed or oviposit, which have different health and population consequences: feeding prolongs life while ovipositing produces new offspring and depletes life.

The 'time' entry is used to schedule the time of the 'future' event. That is, when and individual appears at the top of the event queue.

Source

Lisa D. Forster and Robert F. Luck, Entomology, UC Riverside.

References

www.stat.wisc.edu/~yandell/ewing

See Also

init.simulation,future.events

Examples

data(future.host)
data(future.parasite)

byandell/ewing documentation built on Jan. 3, 2024, 7:27 p.m.