Reduced egg laying caused by a male accessory gland product opens the possibility for sexual conflict in a simultaneous hermaphrodite

Reduced egg laying caused by a male accessory gland product opens the possibility for sexual... © Koninklijke Brill NV, Leiden, 2009 DOI 10.1163/157075509X12499949744306 Animal Biology 59 (2009) 435–448 brill.nl/ab Reduced egg laying caused by a male accessory gland product opens the possibility for sexual confl ict in a simultaneous hermaphrodite Joris M. Koene* , Annelies Brouwer , Jeroen N.A. Hoff er Animal Ecology, Faculty of Earth and Life Sciences, VU University, De Boelelaan 1085, 1081 HV Amsterdam, Th e Netherlands Abstract Promiscuity, sperm storage and internal fertilization enhance sperm competition, which leads to sexual confl ict whenever an advantageous trait for sperm donors is harmful to recipients. In separate-sex species, such confl icts can severely impact the evolution of reproductive characteristics, physiology and behav- iours. For simultaneous hermaphrodites, the generality of this impact remains unclear and underlying mechanisms remain largely unexplored. In the hermaphrodite Lymnaea stagnalis several previous studies showed that investment in eggs diff ers depending on semen receipt, but these were inconsistent about the direction of change. We investigated whether the change in egg laying is caused by a seminal fl uid com- ponent. By intravaginally injecting animals, we here reveal that a component of the seminal fl uid inhibits egg laying, thus providing the fi rst direct evidence for involvement http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Animal Biology Brill

Reduced egg laying caused by a male accessory gland product opens the possibility for sexual conflict in a simultaneous hermaphrodite

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Publisher
Brill
Copyright
© 2009 Koninklijke Brill NV, Leiden, The Netherlands
ISSN
1570-7555
eISSN
1570-7563
D.O.I.
10.1163/157075509X12499949744306
Publisher site
See Article on Publisher Site

Abstract

© Koninklijke Brill NV, Leiden, 2009 DOI 10.1163/157075509X12499949744306 Animal Biology 59 (2009) 435–448 brill.nl/ab Reduced egg laying caused by a male accessory gland product opens the possibility for sexual confl ict in a simultaneous hermaphrodite Joris M. Koene* , Annelies Brouwer , Jeroen N.A. Hoff er Animal Ecology, Faculty of Earth and Life Sciences, VU University, De Boelelaan 1085, 1081 HV Amsterdam, Th e Netherlands Abstract Promiscuity, sperm storage and internal fertilization enhance sperm competition, which leads to sexual confl ict whenever an advantageous trait for sperm donors is harmful to recipients. In separate-sex species, such confl icts can severely impact the evolution of reproductive characteristics, physiology and behav- iours. For simultaneous hermaphrodites, the generality of this impact remains unclear and underlying mechanisms remain largely unexplored. In the hermaphrodite Lymnaea stagnalis several previous studies showed that investment in eggs diff ers depending on semen receipt, but these were inconsistent about the direction of change. We investigated whether the change in egg laying is caused by a seminal fl uid com- ponent. By intravaginally injecting animals, we here reveal that a component of the seminal fl uid inhibits egg laying, thus providing the fi rst direct evidence for involvement

Journal

Animal BiologyBrill

Published: Jan 1, 2009

Keywords: ALLOHORMONE; SEX PEPTIDE; INSEMINATION; SEMINAL FLUID; MOLLUSCA; PULMONATA; SNAIL

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