
In December 1995, tags were implanted in 51-71 cm bluefin tuna near Tsushima island
in the strait between Japan and Korea. As of December 1996, several had been
recovered.One yielded the track shown above, which we show with the permission of the
Japanese National Research Institute for Far Seas Fisheries. Other tags in that group provided the
basis of the track consistency data quoted elsewhere (unpublished data). Also in December 1996
another 50 animals were tagged at the same location.
Tags have also been applied to large (to 350 lb) Atlantic bluefin tuna and to sturgeon,
but none of these have yet been recovered. Implantation in each case was in the body
cavity, although experiments by Brill et. al (1995) with small
dummy tags in small tuna suggest that implants will also be retained in dorsal muscle.
Further use of archival tags is scheduled for bluefin tuna in the Atlantic (U S National
Marine Fisheries Service) and Pacific oceans (Japanese National Research Institute
for Far Seas Fisheries).
Back to Archival tag summary

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