ストロビリディウム繊毛運動と捕食(1)Strobilidium hunting technique





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Published on Nov 5, 2009

Japanese commentary is followed by English commentary

繊毛の動きで餌を引き寄せる 釣鐘あるいはイチゴのような形の繊毛虫、ストロビリディウム。ツリガネムシのように柄は見えないが、まるで柄があるかのように同心円に沿った動きを見せ る。餌をとる工夫は、広い口周辺に密集した繊毛を盛んに動かして、まわりに水流を作り出すこと。見ている間にも餌がポンと自然に口に飛び込んでくる。

----- 月井雄二先生(法政大)のコメント -----
 「まるで柄があるかのように同心円に沿った動きを見せます。」とありますが,先日,ご紹介した Kreutz & Foissner, Protozoological Monograph, vol.3, 2006 の134頁には,細胞の後端から細い糸が出ている画像があります。

Hunting technique The shape of this ciliate called Strobilidium reminds us of a bell or strawberry. Although the body shape is similar to Vorticella, it does not have a stalk, yet like Vorticella, it rotates in a continuous arc. The whirlpool created by the rapid waving of the cilia surrounding its mouth pulls food into the organism.

----- Commentary by Prof. Yuji Tsukii, Hosei University -----
This organism is Strobilidium.

The Protozoological Monograph, vol.3, 134, 2006 (Kreutz & Foissner), depicts the figure of Strobilidium with a narrow string at its rear end, and describes the organism as exhibiting rotatory movement while attaching itself to a surface by its string.


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