Document Type


Date of Degree Completion

Spring 2024

Degree Name

Master of Science (MS)



Committee Chair

Lixing Sun

Second Committee Member

Paul James

Third Committee Member

Hideki Takei


Competition for mating opportunities among individuals of the same sex is a well-documented phenomenon, yet the extent of cooperation in such contexts remains underexplored. This study aims to investigate the occurrence of cooperative bargaining between two males in scenarios of limited and equal female availability, using non-wild descendants of the Trinidad guppy (Poecilia reticulata) as a model species. Four experimental trials assessed courtship length (in seconds) and male-female and male-male interactions, including courtship and aggressive behaviors based on previous research (Magurran et al., 1991). The analysis included the examination of the duration of courtship, the number of aggressive interactions, time allocation between courtship and other behaviors, and the trade-off between aggression and courtship on a Pareto front. Our results indicate a significant impact on courtship length with female limitation (p

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