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雄スルメイカの成熟にともなう精巣および付属腺の発達について

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Title: 雄スルメイカの成熟にともなう精巣および付属腺の発達について
Other Titles: Development of male reproductive organs during sexual maturation in the Japanese common squid Todarodes pacificus
Authors: 池田, 譲1 Browse this author
桜井, 泰憲2 Browse this author →KAKEN DB
島崎, 健二3 Browse this author
Authors(alt): Ikeda, Yuzuru1
Sakurai, Yasunori2
Shimazaki, Kenji3
Issue Date: 1991
Publisher: 日本水産学会
Journal Title: 日本水産学会誌
Journal Title(alt): Bulletin of the Japanese Society of Scientific Fisheries
Volume: 57
Issue: 12
Start Page: 2237
End Page: 2241
Publisher DOI: 10.2331/suisan.57.2237
Abstract: Development of male reproductive organs during sexual maturation was studied for Japanese common squid caught from feeding and spawning grounds. The male maturity was divided into five stages based on the histological observation of the testis. The maturity was compared with testis somatic index (TSI: testis weight as a percentage of body weight) and accessory gland somatic index (AGSI: accessory gland weight as a percentage of body weight). Results showed that sperm have already been produced in the testis even when the testis is a relatively small size, and that the male maturational process consists of two phases. In the first phase, sperm are produced in the testis and in the next phase sperm are transferred into the accessory gland, stored there in the form of spermatophore until copulation with the female. In the maturation stage, sperm are still produced, which means that copulating behavior is repeated by same male during this final sexual stage. It is possible to express the male maturity condition by TSI and AGSI. These numerical values are TSI>0.5 and AGSI>0.1 in the maturing stage; TSI>2.0 and AGSI>l.0 in the mature stage.
Rights: © 1991 公益社団法人日本水産学会
© 1991 The Japanese Society of Fisheries Science
Type: article
URI: http://hdl.handle.net/2115/35535
Appears in Collections:水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 桜井 泰憲

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