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Aquatic Animal Physiology Lab
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The lab explores the reproductive mechanisms of bivalves and sea urchins from the molecular level.
AboutAbout the lab
Unraveling bivalve and sea urchin reproduction, from the molecules up.
The Aquatic Animal Physiology Lab studies the mechanisms of reproduction at the tissue, cell, and molecular levels in bivalves and sea urchins, which have large catches and high aquaculture production in northern Japan.
The lab believes that technology to control sex and maturation would secure a stable supply of the next generation and help produce individuals whose commercial value varies with sex and maturity.
The lab aims to apply its findings to advanced aquaculture and stock enhancement technology.
Key terms
- Aquaculture and stock enhancement
- A way of producing aquatic organisms by increasing and rearing them, combining seed production, stock release, and aquaculture
- Gene transfer
- A technique that introduces a foreign gene into cells or individuals so that it functions there
- Genome editing
- A technique that rewrites targeted locations in an organism's genetic information (DNA)
NewsLab news
A paper by master's students and others on the cryopreservation of scallop spermatogonia was published in Cryobiology
A master's student received the Student Excellent Poster Presentation Award at the Spring Meeting of the Japanese Society of Fisheries Science
A paper by undergraduate students and others on heat shock proteins in scallops was published in Aquaculture
A paper by master's students and others on biopharmaceutical production in scallop hemocytes was published in Marine Biotechnology
A master's student received the Branch President's Award at the Tohoku Branch Meeting of the Japanese Society of Fisheries Science
ResearchResearch themes
Marine invertebrates include many useful species of high industrial value, and demand for their aquaculture and stock enhancement is growing. The lab aims to clarify, at the tissue, cell, and molecular levels, the reproductive mechanisms of bivalves and sea urchins, which have large catches and high aquaculture production in northern Japan, and to apply this knowledge to advanced aquaculture and stock enhancement technology.
*Illustrative imageReproductive Engineering in Bivalves
In bivalves, the lab aims to clarify the functions of genes involved in reproductive mechanisms and to develop technology to control sex. It conducts research on reproductive engineering techniques using gene transfer and genome editing.
*Illustrative imageControlling Maturation in Sea Urchins
In sea urchins, the lab aims to develop rearing methods that improve the quality and quantity of the gonads, the part that is eaten. To this end, it conducts research on the control of maturation.
MembersFaculty
The members of the Aquatic Animal Physiology Lab consist of faculty members, technical assistants, and students in the doctoral program, the master's program, and the undergraduate program.As of 2026
- ProfessorTatsuya Unuma
- Associate ProfessorKazue Nagasawa
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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: “Shellfish farming” Ned Dwyer / CC BY-SA 4.0 (cropped)
- Reproductive Engineering in Bivalves: “Freshwater bivalve shells (Holocene; midwestern USA) 1” James St. John / CC BY 2.0 (cropped)
- Controlling Maturation in Sea Urchins: “Uni (Sea urchin) Gunkanmaki” Zheng Zhou / CC BY-SA 4.0 (cropped)
- Related lab (Animal Reproductive Science Lab): “Human sperm under microscope” Prof. Ideal / CC0 (cropped)
- Related lab (Marine Life Genetic Information Lab): “FMIB 41451 Interior of fish hatchery” 作者不詳 / Public domain (cropped)
- Related lab (Plant Engineering for Environmental Adaptation Lab): “Ripening rice plants in paddy field, Indonesia” Undeka 11 / CC BY-SA 4.0 (cropped)
- Related lab (Animal Breeding and Genetics Lab): “Herd of Hereford cattle in Canada” Quintin Soloviev / CC BY 4.0 (cropped)
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