Sex and the Single Guppy

Title: Sex and the single Guppy

Purpose:

The purpose of this is to demonstrate how guppies survive swimming among different predators.

Hypothesis:

If predators are feeding more on the brightly colored guppies then they will be eliminated from the gene pool and the population will become more drab.

Results:

Simulation 1

Initial Population: Mostly Bright

Predators: 30 Rivulus

Start Finish

Guppies: 134 Guppies: 238

Generation: 2 Generation: 7

Week: 1 Week: 144 (3 years)

Brightest: 47% Brightest: 47%

Bright: 30% Bright: 40%

Drab: 17% Drab: 10%

Drabbest: 6% Drabbest: 2%

The number and type of predator had no affect on the guppy coloration due to the balance at the start.

Simulation 2

Initial Population: Mostly Bright

Predators: 30 Rivulus 30 Acara 30 Cichild

Start Finish

Guppies: 115 Guppies: 216

Generation: 2 Generation: 7

Week: 1 Week: 144 (3 years)

Brightest: 40% Brightest: 4%

Bright: 26% Bright: 16%

Drab: 24% Drab: 34%

Drabbest: 14% Drabbest: 47%

The

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