This model shows how trout seek out and compete for choice spots in a riverbed. The fish prefer deep, calm water, and bigger fish beat out the smaller fish.

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

Download the StarLogoT source code for the Riverbed model:
Download riverbed

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: