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Aquaculture and Stock Enhancement Lab
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A lab that uses genome information to study both the natural evolution of marine organisms and their human-driven evolution through selective breeding.
AboutAbout the lab
Decoding the evolution of marine life from genomes
The Aquaculture and Stock Enhancement Lab uses genome information to study the natural evolution of marine organisms and the evolution driven by human hands (breeding).
Based at the Fisheries Laboratory on the shore of Lake Hamana, the lab combines state-of-the-art bioinformatics with experimental biology, in which organisms are actually reared and studied.
Its work includes the evolution of sex determination mechanisms in fish, breeding improvement using genomic prediction, and the history of wild fish and shellfish populations.
The lab is recruiting undergraduate and graduate students as research colleagues, and undergraduates from other universities are also welcome to join.
Key terms
- Breeding
- Crossing and selecting organisms to create varieties with desired traits
- Sex-determining gene
- A gene that determines whether an individual becomes male or female
- Genomic prediction
- A method that uses genome information to predict in advance traits expressed when organisms are reared, such as growth rate
NewsLab news
A paper on environmental DNA, a collaboration among fisheries and marine laboratories across Japan, has been accepted
The "genome ghost" paper was named one of the most-read papers in Molecular Ecology
A paper on coho salmon has been accepted
A paper on abalone, a marine snail, has been accepted
ResearchResearch themes
The lab aims to elucidate the biological phenomena of marine organisms through genome-wide molecular genetics. Building on the release of the pufferfish linkage map, it studies the evolution of sex-determining genes, genome analysis of wild populations, and breeding improvement using genome information.
*Illustrative imageEvolution of sex-determining genes in fish
Sex-determining genes differ from species to species, and their turnover appears random. The lab studies pufferfish and their relatives, in which closely related species diverged very recently, to search for the principles behind this turnover.
*Illustrative imageTracing distribution history with molecular markers
Using genome information from many sites and individuals as molecular markers, the lab investigates the ecology of marine organisms, the history behind their present distributions, and the mechanisms of evolution.
*Illustrative imageFish breeding using genomic prediction
Using genomic prediction methods, the lab is developing ways to produce fish that grow faster than before on less feed. The aim is to greatly reduce the energy needed for aquaculture.
*Illustrative imageGenetically distinct groups in wild fish and shellfish
The lab examines genomic diversity in wild fish and shellfish to distinguish the regional genetic populations that make up a species. It also uses the genetic diversity of farmed fish and shellfish to investigate human impacts on wild populations.
MembersFaculty
The members of the Aquaculture and Stock Enhancement Lab consist of faculty members, postdoctoral researchers, doctoral and master's students, and administrative staff, technical staff, and technical assistants.As of 2025
- ProfessorKiyoshi KikuchiPublications ↗
- Associate ProfessorSho HosoyaPublications ↗
- Assistant ProfessorShuya KatoPublications ↗
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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: “Lake Hamana (Aerial)” SUGI MAKOTO / CC BY 3.0 (cropped)
- Evolution of sex-determining genes in fish: “Takifugu niphobles Miyajima1” Totti / CC BY-SA 4.0 (cropped)
- Tracing distribution history with molecular markers: “Gel electrophoresis 2” Mnolf / CC BY-SA 3.0 (cropped)
- Fish breeding using genomic prediction: “Salmon Fish Farm on Loch Alsh - geograph.org.uk - 970487” Trevor Wright / CC BY-SA 2.0 (cropped)
- Genetically distinct groups in wild fish and shellfish: “Haliotis discus hannai 002” Jan Delsing / Public domain (cropped)
- Related lab (Aquatic Physiology Lab): “Nihon Medaka in Medaka World of Higashiyama Zoo - 2” KKPCW / CC BY-SA 4.0 (cropped)
- Related lab (Aquatic Biotechnology Lab): “Takifugu rubripes AQUAS” Totti / CC BY-SA 4.0 (cropped)
- Related lab (Inoue Lab): “Colonie de modioles (Bathymodiolus azoricus) sur une cheminée hydrothermale (Ifremer )” Ifremer / CC BY 4.0 (cropped)
- Related lab (Sakamoto Lab): “Loggerhead Sea Turtle (Caretta caretta) ( )” Cliff from Arlington, Virginia, USA / CC BY 2.0 (cropped)
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