Sexual Selection in Males and Females

@article{CluttonBrock2007SexualSI,
  title={Sexual Selection in Males and Females},
  author={Tim H. Clutton‐Brock},
  journal={Science},
  year={2007},
  volume={318},
  pages={1882 - 1885}
}
Research on sexual selection shows that the evolution of secondary sexual characters in males and the distribution of sex differences are more complex than was initially suggested but does not undermine our understanding of the evolutionary mechanisms involved. However, the operation of sexual selection in females has still received relatively little attention. Recent studies show that both intrasexual competition between females and male choice of mating partners are common, leading to strong… 
Reproductive competition and sexual selection
  • T. Clutton‐Brock
  • Biology, Medicine
    Philosophical Transactions of the Royal Society B: Biological Sciences
  • 2017
TLDR
It is argued that different approaches provide complementary insights into the causes of sex differences in reproductive competition, the operation of sexual selection and the evolution of secondary sexual characters and that improvements in the understanding of the Evolution of Secondary sexual characters will require a more comprehensive understanding ofThe ways in which social and ecological conditions modify reproductive competition and development in females and males.
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Evidence of mating failures in two groups of insects, empidid flies and tettigoniid Orthoptera (katydids), are examined, showing that there are mating failures by females in populations in which the direction of sexual selection appears to be reversed, but not in populations where sexual selection seems to be stronger on males.
Sexual selection in females across the animal tree of life
The pioneers of sexual selection theory proposed that males are generally ‘eager’ whereas females are rather ‘coy’ with respect to mating. This male-centred perspective on sexual selection continues
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TLDR
The main characters that comprise sex roles are summarized, the evolutionary causes of general patterns of sex differences are reviewed, and how systems that deviate from these patterns can provide strong tests of sexual selection theory are explored.
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TLDR
It is suggested that the mechanisms responsible for the evolution of secondary sexual characters in females are similar to those operating in males and include intrasexual competition between females for breeding opportunities, male mating preferences and female competition to attract mates.
The evolution and significance of male mate choice.
TLDR
It is concluded that mate choice by males is potentially widespread and has a distinct role in how mating systems evolve.
Sexual selection maintains a female-specific character in a species with dynamic sex roles
TLDR
The results indicate that even brief and circumscribed periods of intrasexual competition among females can lead to sexual selection on morphological characters and that this selection may not depend on multiple mating.
Sexual Selection and Female Competition
Sexual selection studies have traditionally focused on reproductive competition as a typical male characteristic, and regarded females as largely passive. However, empirical evidence now shows female
Stronger net selection on males across animals
TLDR
This study used a comparative approach to show that net selection is indeed stronger in males and provide preliminary support that this sex bias is associated with sexual selection, and supports one of the long-standing key assumptions required to bolster adaptation.
Social competition and selection in males and females
TLDR
It is suggested that classifications of selection based on distinction between the form of competition or the components of fitness that are involved introduce unnecessary complexities and that the most useful approach in understanding the evolution and distribution of differences and similarities between the sexes is to compare the operation of selection in males and females in different reproductive systems.
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