Hermaphroditism

Kobo ebook | March 15, 2011

byJohn Avise

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While members of most sexually reproducing species are either male or female, individuals belonging to the rest of the biological world are not so simply defined. Hermaphroditic creatures reproduce both as a male and as a female, providing a fascinating example of alternative sexual practice and its ecological and evolutionary successes.

Eloquently written by an award-winning biologist and pioneer in molecular ecology, this primer traces the phenomenon of hermaphroditism throughout Earth's species and the adaptive significance of alternative sexual systems. The volume's accessible and richly illustrated text covers the evolutionary origins of hermaphroditism and its historical and fictional instances, proving the relevance of dual sexuality to the everyday world. John C. Avise describes the genetics, ecology, phylogeny, and natural history of hermaphroditic plants, fish, and invertebrate animals and details organisms that either reproduce simultaneously as male and female or switch routinely between one sex and the other. Filled with surprising creatures and inherently compelling topics, this book stands alone in its clear yet comprehensive treatment of hermaphroditism and its unique challenge to the supremacy of separate sexes.

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While members of most sexually reproducing species are either male or female, individuals belonging to the rest of the biological world are not so simply defined. Hermaphroditic creatures reproduce both as a male and as a female, providing a fascinating example of alternative sexual practice and its ecological and evolutionary successe...

John C. Avise is Distinguished Professor of Ecology and Evolutionary Biology at the University of California, Irvine. He is an elected member of both the National Academy of Sciences and the American Academy of Arts and Sciences, and the author or editor of 20 books, including most recently Inside the Human Genome: A Case for Non-int...

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Format:Kobo ebookPublished:March 15, 2011Publisher:Columbia University PressLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:0231527152

ISBN - 13:9780231527156

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Extra Content

Table of Contents

Preface
The Phenomenon of Dual Sexuality
Hermaphroditism in Fiction
Hermaphroditism in the Real World

1. Two Sexes in One
Maleness and Femaleness
Anisogamy and the Separate-sex Condition
Sex Ratios in Separate-sex Taxa
Sex Ratios in Hermaphroditic Taxa
Hermaphroditism Versus Separate Sexes
Summary

2. Dual-sex Plants
Terminology
Alternative Sexual Systems: Natural History and Examples
Cosexuality Versus Dioecy
Selfing Versus Outcrossing
Sexual Selection in Plants
Summary

3. Dual-sex Invertebrates
Biological Examples
Sex Determination and Pseudohermaphroditism
Evolutionary Histories: Gonochorism and Hermaphroditism
Selfing Versus Outcrossing
Sex Allocation in Simultaneous Hermaphrodites
Sex Allocation in Sequential Hermaphrodites
Conclusions About Sex Allocation Theory
Sexual Selection
Summary

4. Dual-sex Vertebrates
Sexual Flexibility
Sequential Hermaphroditism
Adaptive Significance of Alternative Modes
Simultaneous Hermaphroditism
Summary

Glossary

References Cited

Index

Editorial Reviews

Finally!...This new book, for the first time, assembles our state-of-the-art understanding of the biology of hermaphrodite gender expression, and makes the current research agenda on these fascinating organisms broadly accessible to both scientists and (under-)graduate students...