Flashy Fish: Data # ______ name __________________________

Date ________________ per._______

1. If being flashy attracts predators, why are male guppies so colorful? ______________________

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2. What do you think is responsible for the variation in color from one generation to the next? ________________________________________________________________________________

3. Select a hypothesis from the Sex and the Single Guppy Web activity or come up with your

own and record it here._____________________________________________________________ ________________________________________________________________________________

4. Next you will set up your experiment as directed in the simulation. Record your initial

settings here.

Predator types and numbers:_______________________________________________________

Initial guppy population: ___________________________________________________________

5. Run your initial experiment for at least five generations and record your results here.

Number of guppies: __________ Number of generations: _______________

Number of weeks: ____________ Male color types: ______________________________________

Brightest male guppy ____% Bright male guppy ____% Drab male guppy ____%

Drabbest male guppy ____%

6. Was your hypothesis supported by your data?__________ If so, why? ____________________ ________________________________________________________________________

If not, you may want to change your hypothesis and rerun your experiment.

7. New hypothesis: ________________________________________________________________

Record your new data here.

Number of guppies:___________ Number of generations:___________

Number of weeks:____________ Male color types: ______________________________________

Brightest male guppy ____% Bright male guppy ____% Drab male guppy ____%

Drabbest male guppy ____%

8. Was your new hypothesis supported by your data? _________If so, why? _____________________ If not, redo.

9. Summarize what you learned from your experiments. _____________________________________ __________________________________________________________________________________

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Flashy Fish: Discussion Questions

1. Why do some guppies tend to be drabber than others?

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2. Why do some guppies tend to be more colorful?

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3. What role does color play in guppy survival?

__________________________________________________________________________________

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4. Explain the push and pull that the environment has on the coloration of guppies in Endler’s pools.

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