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Our experiment sought to understand mate preference in female guppies, Poecilia reticulata. We observed behavioral differences between wild-type males caught from a local indoor pond and vibrant pet store males, who exhibited higher stress levels, likely due in part to being shipped long distances. Observing these behavioral differences, we hypothesized that females would prefer the less stressed males regardless of color. When a female guppy was presented with both a wild type and a pet store male, we predicted that she would prefer the wild-type male on account of their lower stress.

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