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Sexual Selection, Seminal Coagulation and Copulatory Plug Formation in Primates

Sexual Selection, Seminal Coagulation and Copulatory Plug Formation in Primates This study examines the question of whether multipartner matings by female primates, with resulting sperm competition among males, may have favored the evolution of biochemical mechanisms to enhance seminal coagulationand copulatory plug formation. Comparative ratings of seminal coagulation (using a four-point scale where 1 = no coagulation and 4 = copulatory plug formation) were obtained for 40 species representing 26 primate genera. Coagulation ratings were highest (mean = 3.64) in those genera where females commonly mate with multiple partners, and lowest (mean = 2.09) in genera where females are primarily monogamous or belong to polygynous (one male) units(p < 0.0001). This result remained significant (p < 0.001) after the use of comparative analysis of independent contrasts (CAIC) to control for possible phylogenetic biases in the data set. Results indicate that sexual selection has played an important role in the evolution of seminal coagulation, and copulatory plug function, in primates. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Folia Primatologica Karger

Sexual Selection, Seminal Coagulation and Copulatory Plug Formation in Primates

Folia Primatologica , Volume 73 (2-3): 7 – Aug 1, 2002

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References (46)

Publisher
Karger
Copyright
© 2002 S. Karger AG, Basel
ISSN
0015-5713
eISSN
1421-9980
DOI
10.1159/000064784
Publisher site
See Article on Publisher Site

Abstract

This study examines the question of whether multipartner matings by female primates, with resulting sperm competition among males, may have favored the evolution of biochemical mechanisms to enhance seminal coagulationand copulatory plug formation. Comparative ratings of seminal coagulation (using a four-point scale where 1 = no coagulation and 4 = copulatory plug formation) were obtained for 40 species representing 26 primate genera. Coagulation ratings were highest (mean = 3.64) in those genera where females commonly mate with multiple partners, and lowest (mean = 2.09) in genera where females are primarily monogamous or belong to polygynous (one male) units(p < 0.0001). This result remained significant (p < 0.001) after the use of comparative analysis of independent contrasts (CAIC) to control for possible phylogenetic biases in the data set. Results indicate that sexual selection has played an important role in the evolution of seminal coagulation, and copulatory plug function, in primates.

Journal

Folia PrimatologicaKarger

Published: Aug 1, 2002

Keywords: Sexual selection; Seminal coagulation; Primates; Copulatory plugs; Sperm competition

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