2. After viewing the guppy gallery, pick the fish you find most interesting. What is the fish’s scientific name, origin and average size? Describe the coloration of the fish you chose. The color of the guppy I found the most interesting was the poecilia reticulata. The average size is 1.4" It originated from Brazil. It has a green tail, red dorsal fin, and yellow spots.
3. After viewing the predator gallery, pick the fish you find most interesting. What is the fish’s common name, scientific name, and origin? The fish I found most interesting was the fat sleeper. Its scientific name is dormitator maculatus. It originated in southern North America, The Bahamas, and Latin America
4. View the guppy’s habitats, what habitat conditions would affect the predator populations? Nearby dams or other things to restrict predatory movement.
Endler’s Discovery and Variations of Guppy’s in Pools
5. Who is John Endler? What did he study and where did he study it?John Endler was an evolutionary scientist who studied Trinidad's wild guppy population.
6. For each of the three stream areas, describe the guppy coloration:
Pool 1: Brightly multicoloured with large spots
Pool 2: Medium coloration on body and tail with medium sized spots.
Pool 3: Drab coloration, very small spots concentrated near tail.
7. Develop your own hypothesis about guppy coloration. The hypothesis should answer the questions: Why do guppies in different areas of the stream have difference in coloration? (You can choose from the list on the simulation, or make up your own) Predators prey on the most brightly colored guppies
Guppy Simulation
| % of Brightest Guppies (10 generations) | % of Bright Guppies (10 generations) | % of Drab Guppies (10 generations) | % of DrabbestGuppies (10 generations) | |
| Trial 1 Guppy: Even Mix Predators: 30 Rivulus | 84% | 7% | 4% | 5% |
| Trial 2 Guppy: Even Mix Predators: 30 Rivulus, 30 Acara | 0% | 60% | 40% | 0% |
| Trial 3 Guppy: Even Mix Predators: 30 Rivulus, 30 Acara, 30 Cichlid | 0% | 0% | 2% | 98% |
| Trial 4 Guppy: Mostly Bright Predators: 30 Rivulus | 3% | 16% | 22% | 59% |
| Trial 5 Guppy: Mostly Drab Predators: 30 Rivulus, 30 Acara, 30 Cichlid | 0% | 2% | 3% | 95% |
8. Describe how predators influence guppy coloration.
It seems that the predators eat the brightest/ bright guppies
9. Was your hypothesis correct, use your data to justify your answer.
Yes. The brightest ones were all eaten in every trial but trial 1.
10. What does it mean that “male guppies live in a crossfire between their enemies and their would be mates”?
It means that the flashy guppies are great for attracting mates, but they are also great at attracting predators (dun dun dun dun duuuuuuuuunnnnnnnn)
11. Why do you think guppies in different areas of the stream have different coloration?
I think it all has to do with the conditions of the habitat and the predators that live there.
12. What would happen to mostly drab guppies that were placed in a stream with very few predators?
I think that they would flourish.
13. What would happen to brightly colored guppies that were placed in a stream with many predators?
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