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Mechanisms of Environmental Sex Determination in Fish, Amphibians, and Reptiles

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Choosing Sexes

Part of the book series: Fascinating Life Sciences ((FLS))

Abstract

In many reptiles, amphibians, and fishes, the environment plays a key role in determining the sexes of individuals. Temperature, in particular, appears to be a potent modulator of sex allocation in all three vertebrate classes, yet we do not yet know how temperature interacts with physiology in these systems to influence sexual development. In this chapter, I discuss the gene targets that may be key mediators of temperature sex determination in reptiles, fish, and amphibians, discuss the potential role of hormones in the process of sex determination for all three groups, and highlight the need for comparative studies to explore the potential of a conserved mediator that facilitates sex allocation in response to a variety of environmental and social cues.

Which of these points of view, preformation or epigenesis, we may think more profitable as a working hypothesis is, I believe, the question of the hour. My own preference—or prejudice, perhaps—is for the epigenetic interpretation…

Thomas Hunt Morgan in Hunt (1907)

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  1. Department of Poultry Science, The University of Georgia, Athens, Georgia, USA

    Kristen J. Navara

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Navara, K.J. (2018). Mechanisms of Environmental Sex Determination in Fish, Amphibians, and Reptiles. In: Choosing Sexes. Fascinating Life Sciences. Springer, Cham. https://doi.org/10.1007/978-3-319-71271-0_10

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