このエントリーをはてなブックマークに追加
ID 32992
フルテキストURL
Thumnail fulltext.pdf 1.23 MB
著者
Kumashiro, Mikihiko Department of Biology, Faculty of Science, Okayama University
Sakai, Masaki Department of Biology, Faculty of Science, Okayama University
抄録
To understand the neural mechanisms of reproductive behaviour in the male cricket, we identified motor neurones innervating the muscles in each genital organ by backfilling with cobalt/nickel and recording their extracellular spike activity from nerve bundles of the terminal abdominal ganglion during tethered copulation and spermatophore formation. During tethered copulation, at least two motor neurones innervating two ipsilateral muscles were activated during projection of the guiding rod of the phallic dorsal pouch. Only one motor neurone, innervating four ipsilateral muscles of the dorsal pouch, was responsible for spermatophore extrusion by deforming the dorsal pouch. For spermatophore transfer, three motor neurones, singly innervating three epiphallus muscles, played a major role in opening passages for haemolymph to enter the ventral lobes and median pouch by bending the epiphallus. Two ventral lobe and 3–5 median pouch motor neurones seemed to play a role in expanding or folding the two membranous structures by relaxing or contracting their muscle fibres. After spermatophore transfer, most of the genital motor neurones exhibited a rhythmic burst of action potentials causing movement of the phallic complex coupled with strong abdominal contractions. For spermatophore formation, the genital motor neurones began to accelerate their rhythmic bursts approximately 30 s prior to subgenital plate opening and then changed their activity to tonic bursting or silence. The results have allowed us to describe the timing of the onset and termination of genital muscle contraction more precisely than before, to examine the neural mechanisms of copulatory motor control and to speculate on the neural organization of the reproductive centre for spermatophore extrusion and protrusion.
キーワード
male
cricket
Gryllus bimaculatus
reproductive
behaviour
neural activity
spermatophore extrusion
spermatophore
protrusion.
備考
Published with permission from the copyright holder. This is the institute's copy, as published in The Journal of Experimental Biology, March 2001, Volume 204, Issue 6, Pages 1139-1152.
Publisher URL:http://jeb.biologists.org/cgi/reprint/204/6/1139
Copyright © 2001 The Company of Biologists Limited. All rights reserved.
発行日
2001-03
出版物タイトル
The Journal of Experimental Biology
204巻
6号
出版者
The Company of Biologists Limited
開始ページ
1139
終了ページ
1152
ISSN
0022-0949
NCID
AA00697490
資料タイプ
学術雑誌論文
言語
English
著作権者
The Company of Biologists Limited
論文のバージョン
publisher
査読
有り
PubMed ID
Web of Science KeyUT
Submission Path
biology_general/13