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Evolutionary Perspectives on Pregnancy$
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John Avise

Print publication date: 2013

Print ISBN-13: 9780231160605

Published to Columbia Scholarship Online: November 2015

DOI: 10.7312/columbia/9780231160605.001.0001

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Sexual Selection and Piscine Pregnancy

Sexual Selection and Piscine Pregnancy

Chapter:
(p.185) Chapter Seven Sexual Selection and Piscine Pregnancy
Source:
Evolutionary Perspectives on Pregnancy
Author(s):

John C. Avise

Publisher:
Columbia University Press
DOI:10.7312/columbia/9780231160605.003.0007

This chapter focuses on sexual selection as considered in the intergenerational reproduction phenomena among fish. Since sexual selection has been identified to mold and behaviors and other phenotypes to meet mating demands, it has eventually become related to topics such as mating behaviors, mating systems, sex ratios, sex dimorphism, and other sexual phenomena that strongly suggest the persistence of gender biases among sexual species. Fish are excellent subjects for comparative appraisals of sexual selection, as they include representation species that undergo internal female pregnancy, internal male pregnancy, or external male pregnancy. These gestational phenomena are based on the phylogenetic character mapping (PCM) that traces their evolutional histories, field observation and experimentations as these verify PCM findings, and molecular-parentage analyses that ultimately reveal the genetic (as opposed to “social”) underpinning of the mating systems of particular fish species.

Keywords:   sexual selection, intergenerational reproduction, fish, mating demands, mating systems, mating behaviors, sex ratios, sex dimorphism, internal female pregnancy, male pregnancy

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