Tuesday, October 26, 2010

Guppy Simulation

Guppies are colorful because the females want to mate with the brightest male.
In the guppy gallery the fish that i found most interesting was the Poe ilia reticulata from Peru. It's size is 3.5 cm. I picked this fish based appearance because it is a really attractive color or purple and fuchsia. But here is more colors than that as well.
The fish i found most interesting was the Fat Sleeper, also known as Dormitator masculatus. He is from southern North America, Bahamas, and Latin America.
Some habitat conditions that would affect predators would be the Dams that restrict predator movements or cause them to only moving upstream. Only the Rivulus could go into shallow waters because the others cannot survive there. I would recommend a deep pool in a stream because it could host a large population of predators and guppies.

John Endler was a biologist who studied wild guppies in streams.
Guppy Coloration:
Pool 1:Brightly multi-colored 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 Predators
If the guppies are in an area that restrict predators or restrict the predators movements (like a dam or shallow water), then the bright-brightest guppies would flourish.

Trial 1- Guppy:even mix Predators: 30 Rivulus
Results at 10th generation-
Brightest: 63%
Bright: 15%
Drab: 19%
Drabbest: 3%

Trial 2- Guppy: even mix Predators: 30 Rivulus, 30 Acara
Results at 10th generation-
Brightest: 46%
Bright: 44%
Drab: 9%
Drabbest: 0%

Trial 3- Guppy:Even mix Predators: 30 Rivulus, 30 Acara, 30 Cichlid
Results at 10th generation:
Brightest: 2%
Bright: 2%
Drab: 2%
Drabbest: 94%

Trial 4- Guppy: Mostly bright Predators: 30 Rivulus
Results at 10th generation:
Brightest: 79%
Bright: 13%
Drab: 8%
Drabbest: 0%

Trial 4- Guppy: Mostly Drab Predators: 30 Rivulus, 30 Acara, 30 Cichlid
Results at 10th generation:
Brightest: 0%
Bright: 2%
Drab: 11%
Drabbest: 86%

Predators go after the brightly colored fish, but if the predators eat all the vividly colored guppies then there would be non to pass on their color genes. If there is a lack of predators then bright colored guppies would be the initial population.
My hypothesis was correct because the the trials that had all the predators had an initial population of drab-drabbest coloration while the trials the included on one or two types of predators had the initial population of bright-brightest.
I think that “male guppies live in a crossfire between their enemies and their would be mates” means that the benefit of their bright coloration is that females will mate with them, but the loss of the coloration is that they will be the most likely to be eaten.
Guppies in different parts of the streams have different colorations because of the opulation of predators in the are. Also, in some areas predators have restrictive movement so they would not be able to prey on the brightest guppies. Now the brightest guppies can pass on their genes.
I think that the drab guppies will be eaten because they are the only food for the predators. But I think the coloration would change to an even mix.
I think if brightly colored guppies were placed in a stream with many predators then they would become a mix of coloration-brightly colored. Their population will remain in the same range as well.

Wednesday, October 6, 2010


By preserving biodiversity locally will have a global effect how? Well if we did not preserve biodiverseity then there would be a reduction of oxygen and there would be a lot more pollution. The pollution would cause illnesses which we might not be able to cure because Their ingredients come from organisms which will not have a large population if at all. They will not have a large population because their keystone will die and because they depended on that organism they will also die. By preserving biodiversity we can further our studies that could save lives.

A habitat is where an animal reproduces. When humans takeover their habitats they are forced to move somewhere else and they will not reproduce until they find a new habitat. This is usually a place where already inhabitated by other species. So now the breeding grounds are smaller and because of an increase of population there might not be enough food to go around. Another factor is that it might have taken the animals a while before they abandoned their home, so they might be ill because of being exposed to something their body is not used to and it could spread to the other animals in their new habitat.

Preserving biodiversity could enhance human life with their contribution to medicines and drugs. Because of tiny microorganisms and bacteria people can be cured of an illness.