Movement of 0-aged ocellate puffer (Takifugu rubripes) from waters in and around Mekari-Seto inland sea [Japan]
1996
Sato, R. (Nansei National Fisheries Research Inst., Ono, Hiroshima (Japan)) | Tokai, T. | Shibata, R. | Ogawa, Y. | Sakaji, H.
Tagging experiments of artificially cultured and released, and of natural seeds of 0-aged ocellate puffer were carried out in waters in and around the Mekari-seto area of the Seto Inland Sea, a famous spawning ground of this species. Average percentage recapture rate of those grown from artificial seeds was 3.3 (0.9-5.5) from 1988 to1992 (total number of fish tagged and released was 25,460), and that of natural seeds was 3.3 (2.0-5.5) from 1991 to 1994 (total number of fish caught, tagged and released was 5,631). Most of recaptures were collected in Bingo-Geiyo-seto, Hiuchi-nada and Bisan-seto within three months after release. Twelve out of the sixteen individuals of artificial seed-origin recaptured over a three month period after release were taken at Aki-nada, Suo-nada, Shibsusi Bay, Genkai-nada and Goto-nada, and four in areas to the east of the release site in Harima-nada and Osaka Bay. On the contrary, twenty-one of natural seed-origin were recaptured at Suo-nada, Iyo-nada, Bungo Strait, Hyuga-nada and Goto-nada, but no recaptures were found in eastern waters of the Seto Inland Sea. Thus, we obtained information on the migration pattern of ocellate puffer in the Seto Inland Sea, although there seems to be some differences between those grown from artificial and natural seeds. It is noteworthy that one adult individual of artificial seed-origin was recaptured in the spawning season at area adjacent to the release site. This suggests the possibility that ocellate puffer return to their natal spawning ground like in Salmonidae
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