From: Patch depletion, niche structuring and the evolution of co-operative foraging
Category | Parameter/description | Value | Units |
---|---|---|---|
Time scale | t MIN (minimal action duration) | 10 | sec |
 | day (daylight hours) | 720*6 | t MIN |
 | *(year) | 365 | day |
Spatial scale | individual movement | continuous | Â |
 | resources placement grid | 1 | m |
Local information processing | t E (handling time) | 1 | t MIN |
 | resource detectability range | 2 | m |
 | d R (individual reach) | 0.9 | m |
 | r D (resource detectability) | 0.1 | per t MIN per m2 |
 | z M (max neighbor awareness) | 50 | m |
 | z L (alignment zone) | 25 | m |
 | *(minimal action duration) | 1 | t MIN |
 | *(maximum speed) | 1 | m/t MIN |
Energy and life-history | E r (energy per item) | 2 | units |
 | E m (metabolism) | 1/6 | units/t MIN |
 | E M (maximum energy) | 100000 | units |
 | minimal energy | 0 | units |
 | requirement to give birth | E M | units |
 | birth energy costs | E M /2 | units |
 | offspring energy | E M /2 | units |
 | death rate | 0.1 | per year |
 | maximum age | 10 | years |
 | mutation rate | 0.05 |  |
 | *(t MIN_EAT (minimal eat in-terval: search and eat)) | t MIN + t E | t MIN |
 | *(tMAX_EAT(to compensate for metabolism)) | E r /E m | t MIN |
 | *(max net energy gain) | (E r /t MIN_EAT ) - E m | units/t MIN |
 | *(minimal birth interval) | E M /(2((E r /t MIN_EAT ) - E m )) | t MIN |
Environment | R g (resource influx rate) | 1.1 | items/t MIN |
 | R r (resource renewal interval) | 1 | year |
 | A (field size) | 5660 × 5660 | m |
 | *(carrying capacity) | R g t MAX_EAT | inds |
 | *(R T (total food items)) | R g R r | items |
 | *(average resource density) | R T /A | items per m2 |