Title Migration of released hatchery-reared Japanese flounder Paralichthys olivaceus along the Sea of Japan
Authers Tetsuo FUJII
Keywords Japanese flounder, mtDNA tag, migration
Citation Bull. Fish. Res. Agen. supplement No. 5, 143-146, 2006
A method of tracking released Japanese flounder Paralichthys olivaceus was developed. The mitochondrial DNA of the Japanese flounder is characterized by the extremely high sequence variability especially in the control region. In this method, sequences of hatchery-reared juveniles should be analyzed first. The sequence data are then registered in a database, so that when the flounder later caught, where they originally been produced can be determined. Results from mtDNA tag showed that released Japanese flounder began to migrate in their second winter mainly against Tsushima current, which streams from southwest to northeast. Some of them migrated more than 300km and flounder from several hatcheries were recaptured together. The mitochondrial DNA tag is useful not only for the elucidation of the migration but also for the monitoring of the genetic diversity.
URI http://www.fra.affrc.go.jp/bulletin/bull/bull-b5/26.pdf