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走査電子顕微鏡によるフグ科魚類の凍結保存精子の形態


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Title: 走査電子顕微鏡によるフグ科魚類の凍結保存精子の形態
Other Titles: A Scanning Microscopical Observation of the Cryopreserved Spermatozoa of the Swellfishes
Authors: 宮木, 廉夫 / 道津, 喜衛
Authors (alternative): Miyaki, Kadoo / Dotsu, Yoshie
Issue Date: Nov-1987
Publisher: 長崎大学水産学部
Citation: 長崎大学水産学部研究報告, v.62, pp.17-21; 1987
Abstract: Spermatozoa of five species of tetraodontid fishes of Japanese seas, consisting of two Lagocephalus species, two Takifugu species and an artificial inter-specific cross of Takifugu, were observed by a scannig electron microscope. The spermatozoa observed in this study had been cryopreserved in liquid nitrogen for 177 to 299 days before the observations. The head of a spermatozoon of Shirosabafugu, Lagocephalus wheeleri is nearly glove, measuring 1.42μm in length and 1.12μm in width and that of Kurosabafugu, L. gloveri is oval, 1.51μm and 0.95μm, respectively. Those of Kusafugu, Takifugu niphobles, Torafugu, T. rubripes and the artificial cross between female T. niphobles and male T. rubripes are all ellipsoid measuring as 1.77~1.93μm in length and 0.75~0.82μm in width. The tail length of the spermatozoon of L. wheeleri is about 15 times the head length (1.42μm) and that of T. rubripes is about 12 times the head length (1.93μm). The morphometric difference of the head of the spermatozoon between Lagocephalus and Takifugu partly explains the difficulty in artificial intergeneric cross reported. The similarity of the spermatozoon heads among Takifugu species partly interprets the ease in artificial interspecific crosses in the genus and common occurrence of swellfishes which are supposed as interspecific crosses in nature, in the East China Sea and its adjacent seas.
Keywords: フグ科魚類 / swellfishes (Tetraodontidae) / 凍結保存精子 / cryopreserved spermatozoa / 走査電顕観察 / a scanning electron microscopy / 精子の形態 / morphology of spermatozoa
URI: http://hdl.handle.net/10069/30288
ISSN: 05471427
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:第62号

Citable URI : http://hdl.handle.net/10069/30288

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