NetLogo User Community Models
by Systems&Cycles (Submitted: 06/06/2013)
WHAT IS IT?
A simulation of fish that swim, eat, grow, reproduce, excrete waste and die.
HOW IT WORKS
Two breeds of fish, male and female. Periodically, some amount of food is added to the fish tank.
HOW TO USE IT
Set the number of male and female fish that you would like to start with. Be sure to turn the filter to an amount adequate for the number of fish that you have. Set the amount of food they will get periodically.
THINGS TO NOTICE
Effects of variables on water quality and fish population. Relation between fish population and water quality. See relation between amount of food and population range. Watch the fry (baby fish) grow! Watch the monitors to see the causes of death.
THINGS TO TRY
Setting different ratio of male and female fish Changing probability of spawning Changing amounts of food Changing efficiency of filter
EXTENDING THE MODEL
different types of fish that are more or less tolerant of variations in water quality size of tank monitoring when parameters are changed monitoring # water changes and when they occur plants nitrate variable fish activity and feeding as f (light) temperature pH dissolved oxygen and carbon dioxide disease transmission (e.g. Ich)
This section could point out any especially interesting or unusual features of NetLogo that the model makes use of, particularly in the Procedures tab. It might also point out places where workarounds were needed because of missing features.
CREDITS AND REFERENCES
Cindy E. Hmelo-Silver Lei Liu 2004
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