# Predator/Prey Simulation Final Write up is due 9/16.

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Predator/Prey Simulation Final Write up is due 9/16

Planning Purpose/Question: How does the predatory and prey relationship of ______ and _______ effect the negative feedback process seen in the natural environment? Hypothesis: The negative feedback process can be seen through the linked population fluctuations of predators and prey over time.

Planning Variables: To understand your ratios and variables, you will need to first research which predator and prey relationships you want to use. 1.Determine the Independent variable and the dependent variable 2.Decide which variables are constant, (ie the ratios, drop height, territory size etc.)

Planning Predicting ratios: Determine how many prey will feed 1 predator and keep them alive for 1 reproductive cycle. Determine how many prey will feed 1 predator in order to care for future offspring. Determine the reproduction ratio of prey and reproduction ratio of predators. Determine the counting of prey eaten by predator when landing on more than 1 prey.

Planning Examples of ratios: – fox: hare Predator survival – 1:2 Predatory survival and produces offspring for next trial– 1:4 Reproduction rate of prey – 2hares:4offspring Reproduction rate of predators – 1parent:2 offspring Starting population sizes: 3:30 – If all predators die, start next simulation with 3 predators

Planning Materials: – Masking tape (for outline of territory) – 24 - 2”X2” squares for predators – 300 – 1”X1” squares for prey – Notebook/graph paper for data table – Pen or pencil for recording data

Data: Population Changes of Predators and Prey Trials (reproductive cycle) Starting Population of Predators Ending Population of Predators Starting Population of Prey Ending Population of Prey 1 Pre-determinedcountedPre-determinedcounted 2 calculatedcountedcalculatedcounted 3 4 5 6 7 8 9 10. etc.

Analysis Graph the ending populations in one graph Graph calculated populations in a separate graph. Look for patterns (that is the analysis) Write a brief qualitative analysis of what the graphs are quantitatively showing. DO NOT forget to give titles to each graph and (figure1 etc) to the axis. Include units!

Example graph