Wolf Sheep Predation

This model explores the stability of predator-prey ecosystems. Such systems are called unstable when they tend to result in extinction for one or more species involved. In contrast, systems are stable when they tend to maintain themselves over time, despite fluctuations in population sizes.

For detailed instructions on using the program, take a look at the info window from the Wolf Sheep Predation model.

Download the StarLogoT source code for the Wolf Sheep Predation model:
Download predation

To run this file you need StarLogoT2002 for the Macintosh.
(download StarLogoT)

Click on one of the pictures to see a quicktime movie of the model:
This movie shows the model running without grass - that is, two species predator-prey interaction with wolves chasing sheep. (4.5 MB)
This movie includes wolves, sheep and grass - that is, three species predator-prey interaction. (3.4 Mb)