Diorama Behavior Team (A01-2)

This team leaders are Dr. Shikata, who is investigating the diurnal vertical migration of harmful red tide algae in Diorama and Panoramic environments, and Dr. Shiba, who is studying the flagellar motion of sperm as they change direction toward the egg. They are responsible for supplying experimental data to other groups, as needed.

Research Subject

Response measurement and regulatory mechanism of sperm chemotaxis in Diorama environments

The sperm is a single cell with the important task as fertilization. To reach the egg sperm shows various responses such as chemotaxis, reotaxis and thermotaxis by using their‘proto-intelligence’. In this research we focus on sperm chemotaxis and measure the sperm response including sperm swimming trajectories, flagellar motility and intracellular signaling. We aim to understand the regulatory mechanism required for the skillful behavior, motor activity and adaptation of sperm through the analysis and measurement under Diorama environments.


Sperm flagllar waves in the ascidian


Changes in sperm flagellar waveforms during chemotactic turn


Intraflagellar calcium ion imaging in the ascidian sperm


Sperm spawning in coral


Diorama Behavior Team (A01-2)

Kogiku Shiba

Shimoda Marine Research Center, University of Tsukuba
Assistant Professor Kogiku Shiba

D. in Animal Physiology (Cell motility) from Ochanomizu University in 2005.
Postdoctoral Fellow, Misaki Marine Biological Station, The University of Tokyo, 2005-2009.
Postdoctoral Fellow, Shimoda Marine Research Center, University of Tsukuba, 2009.
Assistant Professor, Shimoda Marine Research Center, 2009-present.
Research Areas: Cell biology, Marine biology, Reproductive biology.

Lab. HP

Kazuo Inaba

University of Tsukuba
Shimoda Marine Research Center
ProfessorKazuo Inaba

Lab. HP

Masaya Morita

University of the Ryukyus
Tropical Biosphere Research Center
Associate ProfessorMasaya Morita

Lab. HP

Manabu Yoshida

Misaki Marine Biological Station, School of Science, the University of Tokyo
Associate ProfessorManabu Yoshida

Lab. HP

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