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タイトルヨミ
オオタニシ ノ セイソウ ハッタツ ニ トモナウ ミギ ショッカク ノ ユウセイカ
日本語以外のタイトル
Masculinization of the right antenna with the testicular development in the snail Cipangopaludina japonica
ファイル
言語
日本語
属性
自然科学
著者
舟木 賢治
宮下 健太
内容記述(抄録等)
Pond snail is widely distributed in rice field and pond in Japan except for Hokkaido. It is possible in the mature individuals of the pond snail to easily distinguish male and female only by observing the form of the right antenna. Because the right antenna of male bends like a hook and functions as a penis, while that of female is straight. In the childish male shell, however, the bending of the right antenna is not observed. Therefore, the bending of the right antenna in the mature male seems to be the secondary sexual character which is generated with the the testicular development.
In present study, molphological and histological changes in right antenna and testis in the male adult shell of Cipangopaludina japonica were examined in order to clarify whether the bending of the right antenna in male pond snail is secondary sexual character. As the result, the right antenna in male bends like a hook after the active spermatogenesis would be observed in the seminiferous tubule which was rapidly developed by the proliferation of reproductive cells. In addition, the histological changes with testicular development were observed in seminal duct which longitudinally passes through the inside of antenna and in the surface of antenna.
These results indicate that morphological and histological changes in the right antenna of the male adult shell of pond snail is the secondary sexual character which is generated with the development of seminiferous tubule.
掲載誌名
島根大学教育学部紀要
40
開始ページ
109
終了ページ
114
ISSN
18808581
発行日
2006-12-22
NCID
AA12171265
DOI(SelfDOI)
出版者
島根大学教育学部
出版者別表記
Faculty of Education Shimane University
資料タイプ
紀要論文
ファイル形式
PDF
著者版/出版社版
出版社版
部局
教育学部
備考
39-41+ / 2006-2007
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