Acta Biologica Hungarica

, Volume 55, Issue 1–4, pp 113–120 | Cite as

Auto-Spermatophore Extrusion Reveals That the Reproductive Timer Functions in the Separated Terminal Abdominal Ganglion in the Male Cricket

  • M. SakaiEmail author
  • M. Kumashiro


Auto-spermatophore extrusion is a kind of spermatophore extrusion without genital coupling in the male cricket. It rarely occurred in intact males paired with a female, while it frequently occurred in all the males with the connectives cut under restraint and dissection. The time interval (SPaSE) between spermatophore preparation and auto-spermatophore extrusion was found to be comparable to that (RS2) of the time-fixed sexually refractory stage measured by the calling song. According to extracellular spike recording, the dorsal pouch motoneuron (mDP), which singly innervates the dorsal pouch muscles and is responsible for spermatophore extrusion, showed a burst discharge in association with auto-spermatophore extrusion with an interval similar to RS2 in males with the connectives transected between the 6th abdominal ganglion and the terminal abdominal ganglion (TAG) after spermatophore preparation. These results strengthened our previous conclusion that the reproductive timer for RS2 is located in the TAG, and demonstrated that it functions normally even in the TAG separated from the rest of the central nervous system.


Male cricket reproduction sexual refractoriness timer terminal abdominal ganglion 


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Copyright information

© Akadémiai Kiadó, Budapest 2004

This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  1. 1.Department of Biology, Faculty of ScienceOkayama UniversityOkayamaJapan

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