
Contents
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Introduction Introduction
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Mechanisms of Sexual Selection Mechanisms of Sexual Selection
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Intrasexual Selection Intrasexual Selection
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Weaponry Weaponry
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Exaggerated Sensory Structures Exaggerated Sensory Structures
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Intersexual Selection Intersexual Selection
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Sexual Conflict Sexual Conflict
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Relationship between Sexual Selection and Sexual Conflict in Crustaceans Relationship between Sexual Selection and Sexual Conflict in Crustaceans
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Conclusions and Future Directions Conclusions and Future Directions
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Acknowledgments Acknowledgments
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References References
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11 Sexual Selection and Sexual Conflict in Crustaceans
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Published:September 2020
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Abstract
Research using crustaceans has improved the understanding of sexual selection and sexual conflict. This is particularly true for understanding the biology of male weaponry and sexual conflict over mate guarding. Male crustaceans often are equipped with exaggerated claws that they use to monopolize access to females or resources that females use for reproduction. However, these weapons are often used in other contexts, e.g. mate choice and coercion of females, and understanding their evolution requires a broader perspective of how these traits are built and the fitness consequences of their use for both the bearer and interacting individuals. Although less well studied than male weaponry, crustaceans also provide excellent examples of elaborate sensory structures that are used in scramble competition among males for females. In addition to studies on male-male competition, crustaceans have been well represented in research on intrasexual selection (for the most part, female mate choice). Crustacean females use a variety of sensory channels to assess mates, and a challenge is to better understand what is being conveyed by signaling males and the fitness consequences of mate choice for females. In some cases the female’s sensory system appears to be exploited by males, and this could lead to sexual conflict over mating. Research on crustaceans has also informed the understanding of sexual conflict over mate guarding, including the evolution of traits used to resolve conflict and how the ecological context shapes the costs and benefits of guarding for both sexes.
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