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Primary sexual traits, those structures and processes directly involved in reproduction, are some of the most diverse, specialized, and bizarre in the animal kingdom. Moreover, reproductive traits are often species-specific, suggesting that they evolved very rapidly. This diversity, long the province of taxonomists, has recently attracted broader interest from evolutionary biologists, especially those interested in sexual selection and the evolution of reproductive strategies. Primary sexual characters were long assumed to be the product of natural selection, exclusively. A recent alternative

Generative organs --- Sexual selection in animals. --- Evolution. --- Sexual selection in animals --- Anatomy --- Genitalia --- Animal Structures --- Evolution --- Mating Preference, Animal

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Reproductive skew is the study of how reproduction is partitioned in animal societies. In many social animals reproduction is shared unequally and leads to a reproductive skew among group members. Skew theory investigates the genetic and ecological factors causal to the partitioning of reproduction in animal groups and may yield fundamental insights into the evolution of animal sociality. This book brings together new theory and empirical work, mostly in vertebrates, to test assumptions and predictions of skew models. It also gives an updated critical review of skew theory. The team of leading contributors cover a wide range of species, from insects to humans, and discuss both ultimate (evolutionary) and proximate (immediate) factors influencing reproductive skew. Academic researchers and graduate students alike with an interest in evolution and sociality will find this material stimulating and exciting.

Vertebrates --- Sexual selection in animals --- Vertébrés --- Sélection sexuelle chez les animaux --- Reproduction --- Sexual selection in animals. --- Animals, Sexual selection in --- Natural selection --- Sexual behavior in animals --- Vertebrata --- Chordata --- Reproduction.

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In this book, the authors present current research in the study of the evolutionary perspectives, mating strategies and long-term effects on genetic variation of sexual selection. Topics discussed in this compilation include sexual dimorphism in insect longevity; evidence of natural and sexual selection shaping the size of nuptial gifts among a single bush-cricket genus; mate choice copying in both sexes of the guppy; and sexual selection under parental choice.

Sexual selection in animals. --- Variation (Biology) --- Biological variation --- Biology --- Heredity --- Genetics --- Mutation (Biology) --- Animals, Sexual selection in --- Natural selection --- Sexual behavior in animals

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The purpose of this book is to explain why red-winged blackbirds are polygynous and to describe the effects of this mating system on other aspects of the biology of the species. Polygyny is a mating system in which individual males form long-term mating relationships with more than one female at a time. The authors show that females choose to mate polygynously because there is little cost to sharing male parental care in this species, and because females gain protection against nest predation by nesting near other females. Polygyny has the effect of intensifying sexual selection on males by increasing the variance in mating success among males. For females, polygyny means that they will often share a male's territory with other females during the breeding season and will thus be forced to adapt to frequent female-female interactions.This work reviews the results of many studies by other researchers, as well as presenting the authors' own results. Studies of red-winged blackbirds have ranged from long-term investigations of reproductive success and demography, to research on genetic parentage based on modern molecular methods, to a variety of experimental manipulations of ecological circumstances and behavior. Since the red-winged blackbird is one of the best studied species of any taxa in terms of its behavior and ecology, the authors have a particularly extensive body of results on which to base their conclusions.Originally published in 1995.The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.

Animaux [Comportement sexuel chez les ] --- Animaux sauvages--Comportement sexuel --- Animaux sauvages--Sexualité --- Animaux--Comportement sexuel --- Animaux--Sexualité --- Breeding behavior --- Comportement sexuel chez les animaux --- Comportement sexuel des animaux --- Dieren [Seksueel gedrag bij de ] --- Gedrag [Seksueel ] bij de dieren --- Mating behavior --- Relations sexuelles chez les animaux --- Reproductive behavior --- Seksueel gedrag bij de dieren --- Seksuele selectie bij dieren --- Selection sexuelle chez les animaux --- Sex behavior in animals --- Sexual behavior in animals --- Sexual selection in animals --- Vie sexuelle animale --- Red-winged blackbird --- Sexual behavior in animals. --- Sexual selection in animals. --- Behavior. --- Polygyny in animals. --- Animals, Sexual selection in --- Natural selection --- Behavior --- Red-winged blackbird - Behavior.

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This book describes about 30 years of theoretical, empirical, and experimental work on butterfly sperm competition. It considers the reproductive morphology and sperm utilisation interests of males and females, which shape the mating tactics of each sex. Females of most butterfly species mate multiple times throughout their lives. The reasons are explored, as well as the numerous adaptations males have developed to prevent future mating and fertilisation by the sperm of other males. In particular, this volume focuses on the role of apyrene sperm. Eupyrene and apyrene sperm dimorphism is most likely a key factor in sperm competition, and the study in butterflies promotes understanding of sexual selection across animal species with sperm polymorphism. This book, describing the evolutionary causes and consequences of the sperm competition in butterflies, is a recommended read for students of behavioural ecology.

Ecology --- Earth & Environmental Sciences --- Sperm competition. --- Butterflies. --- Butterflies --- Breeding. --- Lepidoptera diurna --- Rhopalocera --- Inter-ejaculate competition --- Lepidoptera --- Competition (Biology) --- Sexual selection in animals --- Animal ecology. --- Entomology. --- Animal behavior. --- Animal Ecology. --- Behavioral Sciences. --- Animals --- Animals, Habits and behavior of --- Behavior, Animal --- Ethology --- Animal psychology --- Zoology --- Ethologists --- Psychology, Comparative --- Insects --- Behavior --- Behavioral sciences.