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created with NetLogo

view/download model file: ericaiello2-9-08.nlogo

WHAT IS IT?

This model shows how the real world works, because, after time passes, the population will grow, and keep growing faster. This model does not work the way I like, but it still works, the only thing that does not seem right is that the population gets too big.


HOW IT WORKS

The girl, or "pink," turtles need to be near boys, or "blue," turtles to reproduce. The turtles move randomly, and will die after a while.


HOW TO USE IT

The lifespan slide will allow you to make the turtles live longer, or have a shorter life.
The birthrate slide sets the chance that reproduction will take place.
The initial-population lets you choose how many turtles you want the model to begin with.
The age-to-reproduce lets you choose when the turtles can reproduce.


THINGS TO NOTICE

When you hit setup, there is a chance that the turtles will die in a flash. Try making their lifespan longer, or let them reproduce at a younger age.

Without the capacity slider, the population would keep growing until NetLogo crashed.


THINGS TO TRY

If there are too many turtles, make the age-to-reproduce larger than the lifespan, this might make some neat results. Also, see if you can make it so that there is a constant population.


EXTENDING THE MODEL

It would be neat if I could work it in so that when the population gets to high, turtles start to die off because they don't have enough room. It also would be very cool if turtles started fighting for space.


CREDITS AND REFERENCES

“Created by Eric Aiello on 2-9-2008 for the apprenticeship program at
Shodor Education Foundation.”