A neuroethological study of the sexual behavior in the salmon
Project/Area Number |
03640594
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Research Category |
Grant-in-Aid for General Scientific Research (C)
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Allocation Type | Single-year Grants |
Research Institution | University of Tsukuba Yokohama City University |
Principal Investigator |
SATOU Masahiko (1992) Grad. Sch. Integr. Sci., Yokohama City Univ., 大学院総合理学研究科, 教授 (50124673)
岡村 直道 (1991) 筑波大学, 基礎医学系, 講師 (30134224)
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Project Period (FY) |
1991 – 1992
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Project Status |
Completed (Fiscal Year 1992)
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Keywords | Salmon / Hime salmon / Sexual behavior / Lateral line / Neuroethology / 精子成熟 / 精巣上体 / 運動性 / 受精能 / 上皮細胞 / 初代単層培養 |
Research Abstract |
For animals, like many fishes, the timing of both the sperm- and egg-release is essential for successful fertilization to occur. In the hime salmon (landlocked red salmon, Oncorhynchus nerka) this is achieved by exchanging signals specific for this purpose between the sexes. In this study, we aimed at clarifying (1) what are the signals and their character which are exchanged between the sexes, (2) what are the sensory systems processing these signals, and (3) how the central nervous system processes these signals to elicit the spawning behavior. The results using both the behavioral and electrophysiological methods showed that the hime salmon exchange between the sexes both the vibrational signals arising from the body vibration and visual signals to elicit the spawning behavior. The vibrational signals are processed through the lateral line system to integrate them with those from the visual signals. Furthermore, it was found that field potentials are evoked from the medial nucleus of the medulla (the first relay station of the vibrational information) which are synchronized with the vibrational stimuli.
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Report
(2 results)
Research Products
(11 results)
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[Publications] Okamura,N.,Onoe,S.,Sugita,Y.,Paquignon,M.,Dacheux,F.,and Dacheux,J.ーL.: "Water insoluble fraction of egg yolk maintains porcine sperm motility by activating adenylate cyclase." Mol.Reprod.Develop.28. 136-142 (1991)
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[Publications] Okamura,N.,Dacheux,F.,Venien,A.,Onoe,S.,Huet,J.ーC.,and Dacheux,J.ーL.: "Localization of a maturation dependent epididymal sperm surface antigen recognized by a monoclonal antibody raised against a 135 KDa protein in porcine epididymal fluid." Biol.Reprod.(1992)
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[Publications] Dacheux,J.ーL.,Okamura,N.,Chevrier,C.,Dacheux,F.,Jeulin,C.,Gatti,J.ーL.,and Paquignon,M.: "Comparative Spermatology" Raven Press,