This applet demonstrates a predator-prey growth model
for the number of Foxes and Rabbits in a region given user input for the
initial populations F0 and R0
and the Growth Rate for the Rabbit population. The difference equations
used are:
Ri+1 = Ri + G*(1 - Ri / 500)*Ri
- .0001*Ri * Fi
Fi+1 = Fi + .0001*Ri * Fi
- .02 * Fi
Use the slider to adjust the Rabbit Growth Rate, G
Drag the small dot on the R-F plane to set the initial populations R0
and F0