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Marine Biology Lab
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The lab uncovers the mechanisms of sex and reproduction in fish to contribute to the fisheries industry.
AboutAbout the lab
Fisheries as a future production system for animal protein
The Marine Biology Lab aims to uncover the mechanisms of reproduction in fish and to contribute to the fisheries industry and food production.
Using chub mackerel, Japanese anchovy, tiger pufferfish, and sex-changing wrasses as experimental models, the lab studies the mechanisms of sex and reproduction at the molecular, cellular, and physiological levels.
The lab also researches and develops new life science technologies aimed at the future of fisheries, such as genome editing and stem cell manipulation.
The lab is part of the Aqua-Bioresource Innovation Center (ABRIC) of the Faculty of Agriculture, Kyushu University.
Key terms
- Sexual plasticity
- The ability of sex to change rather than remain fixed. Fish that change sex are an example.
- Genome editing
- A technology for rewriting targeted locations in an organism's genes
- Epigenetics
- The field that studies how gene activity is switched on and off without changing the DNA sequence
- Germline stem cells
- Cells that give rise to sperm and eggs
NewsLab news
Professor Emeritus Matsuyama of the Aqua-Bioresource Innovation Center received the Japan Agricultural Science Award and the Yomiuri Agricultural Science Award
A master's student received the Student Young Researcher Excellent Presentation Award (oral) at the Japanese Society for Aquaculture Science
ResearchResearch themes
The lab believes that a detailed understanding of the reproductive mechanisms of marine organisms is essential for the sustainable development of aquaculture, which continues to grow rapidly worldwide, and for the sustainable use of limited fishery resources. It conducts basic research on the molecular, cellular, and physiological mechanisms of biological phenomena, centered on sex and reproduction, and carries out research and development of new life science technologies aimed at the future of fisheries, such as genome editing and stem cell manipulation.
*Illustrative imageSexual maturation, sex differentiation, and sexual plasticity
The lab studies the unknown mechanisms of sex and reproduction in marine organisms such as fish at the molecular and cellular levels. Using experimental systems with marine fish and small model fish such as medaka, it aims to clarify both the universality of these mechanisms and their diversity among species.
*Illustrative imageDeveloping new production and breeding technologies
Building on knowledge and techniques from fish physiology, molecular and cell biology, and reproductive engineering, the lab researches and develops new production and breeding technologies for marine fish. It works on genome editing, manipulation of germline stem cells, and epigenetic analysis.
*Illustrative imageResearch linking aquaculture sites with other fields
To solve problems at production sites and build sustainable aquaculture systems, the lab collaborates with aquaculture sites and other fields. Examples include real-time monitoring of fish schools using ICT at chub mackerel aquaculture farms, and breeding fish that are resistant to red tide.
MembersFaculty
The members of the Marine Biology Lab are faculty members and doctoral, master's, and undergraduate students.As of 2026
- ProfessorKohei Ohta
- Assistant ProfessorAkihiko Yamaguchi
- Assistant ProfessorCHAKRABORTY Tapas
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Fish farm Krumë” Arianit / CC BY-SA 4.0 (cropped)
- Sexual maturation, sex differentiation, and sexual plasticity: “Betta spawning” ZooFari / CC BY-SA 3.0 (cropped)
- Developing new production and breeding technologies: “Erwin National Fish Hatchery rainbow trout eggs sacfry 24 March 2022” Ryan Hagerty/USFWS / Public domain (cropped)
- Research linking aquaculture sites with other fields: “Fish farming in cage” DelwarHossain / CC BY-SA 4.0 (cropped)
- Related lab (Genome Chemistry and Engineering Lab): “Bryophyte Leaf Cells” KarlGaff / CC BY-SA 4.0 (cropped)
- Related lab (Aquaculture Biology Lab): “Marine algae in Gullmarsfjorden at Sämstad 4” W.carter / CC0 (cropped)
- Related lab (Aqua Field Science Lab): “Erizo de mar violáceo (Sphaerechinus granularis), Madeira, Portugal, , DD 40” Diego Delso / CC BY-SA 4.0 (cropped)
- Related lab (Zoology Lab): “IVF laboratory” Galina Fomina / CC BY 4.0 (cropped)
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