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).