Skip to main content
. 2016 Jan 11;11(1):e0145544. doi: 10.1371/journal.pone.0145544

Table 1. Overview of parameters and variables with their respective numeric values.

Parameters Description Value(s)
SDEV Chronological age at maturity 19
κ Maximum increase of biological age 1000
ω Maintenance efficiency -4
β Half-saturation value for maintenance 10
μb Basal mortality 0.005
μd Biological age dependent mortality 0.005
States
S Development time 0–20
D Biological age 0–1999
E Resource acquisition value a 0.1, 0.3, 0.5, 0.7, 0.9
Other variables
U Resource allocated to maintenance 0–0.9
R Resource allocated to reproduction 0–0.9
D0 Biological age at birth 0–1000
M Mortality per time step b 0 –∞
Q Strategic value of allocation to maintenance or reproduction 0–1

a acquisition takes five discrete values in the current model, but this can be adjusted based on user preferences

b although theoretically biological age is unlimited in practice it is limited in this model by 1999 (see Eq 4).