
Stochastic effects in biological control systems 275
5 10 15 20
0
10
20
30
40
50
60
Period [min]
Number of Cells [%]
Mean = 7.47 [min]
Standard Deviation = 0.20 [min]
5%
FIGURE 8.8: Robustness a nalysis of the period of the internal cAMP oscilla-
tions with respec t to perturbations of 20% in the model parameters and initial
conditions: extended stochastic model with ten synchronised cells.
opmental path and it was argued that they represent the key factor in the
development of spira l patterns of cAMP waves during aggregation.
The results of this case study make some interesting contributions to the
“stochastic versus deter ministic” modelling debate in systems ...