Sex and the Single GuppyName:

Go to this website:

Visit the Guppy Gallery and answer these questions.

  1. How many species of guppies are shown?
  1. What is the scientific name of the

guppies shown?

  1. What is differences do you observe between the

guppies shown?

Visit the Predator Gallery - List all the predators shown.

Common Name / Scientific Name
1. Fat sleeper
2. Tiger fish
3. Golden trahira
4. Blue acara
5. Rivulus
6. Pike cichlid

Visit the Habitat Gallery – List the characteristics of each habitat

Location / Description / Fish/Predator Populations
1. Quare River, Trinidad
2. Aripo River, Trinidad
3. Shallow pools
4. Small Water falls
5. Large Water falls

Go to the simulation screen. From the introduction, click I’m ready to find out. Look at the 3 pools and read the text.

List the observations made by John Endler when studying these fish:

1.

2.

3.

4.

Click – what causes Guppy variation. Read the hypotheses.

List the one you think is most reasonable.

Hypothesis:

Answer the following questions to describe how will you set up your simulation pool to test this hypothesis.

Guppy color types:

Predator species & numbers:

Allow your experiment to run for at least 5 generations and then record the following:

Final Number of guppies =

Number of generations =

Number of weeks =

Final # of Brightest / Final # of Bright / Final # of Drab / Final # of Drabbest

Click – View results. Read the summary.

Answer these questions.

  1. Was your hypothesis supported by your data? Explain what you predicted would happen and what actually happened.
  1. What would you change in your experiment? Try it and record your results.

Guppy color types:

Predator species & numbers:

Allow your experiment to run for at least 5 generations:

Final Number of guppies =

Number of generations =

Number of weeks =

Final # of Brightest / Final # of Bright / Final # of Drab / Final # of Drabbest
  1. Was your second hypothesis supported by your data? Explain what you predicted would happen and what actually happened.

Explain what you learned.

  1. Why do some guppies tend to be drabber than others?
  1. Why do some guppies tend to be more colorful?
  1. What role does color play in guppy survival?
  1. Explain the environmental pressures in the different pools that Endler studied. Summarize what his study shows about the variation in color of wild guppies.