Keio University

Annual Changes in the Reproductive Mode of Planarians in Nature and in the Laboratory—Is the Switch in Reproductive Mode Governed by a Circannual Rhythm?

Publish: December 12, 2022
Public Relations Office

December 12, 2022

Keio University

Hanae Nodono, then a Visiting Junior Research Fellow, and Associate Professor Midori Matsumoto of the Department of Biosciences and Informatics, Faculty of Science and Technology, Keio University, were the first in the world to discover that the switch in reproductive mode of the planarianDugesia ryukyuensis, which alternates its reproductive mode annually in the wild, is maintained on a nearly one-year cycle even under constant laboratory conditions.

The results of this research were published in "Zoology" on December 1, 2022.

Please see below for the full press release.

Press Release (PDF)