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Fishery Bulletin 101(3) 



and there was no scar after a half year. No damage to vis- 

 ceral organs was observed for the two fish. The finding is con- 

 sistent with that for southern bluefin tuna (Gunn et al.'^). 



Fish tagged with archival tags usually showed similar 

 behavioral patterns, such as diurnal change of swimming 

 depth and vertical excursions at dawn and dusk (Itoh et al., 



