Suda, A. 1962. Studies on the albacore. 8. Ecologi- 

 cal considerations on the albacore in the Philip- 

 pine sea (Considerations on the movement of big 

 sized albacore from distributing ground of imma- 

 ture group (North Pacific current area) to sup- 

 posed spawning ground (North equatorial current 

 area). [In Jpn . , Engl. summ.]. Rep. Nankai Fish. 

 Res. Lab. 16:127-34. 



KEY WORDS: tuna, albacore, migration, spawn- 

 ing, geography, currents, season. 



Suda, A., S. Kume, and T. Shiohama. 1969. An indica- 

 tive note on a role of permanent thermocline as a 

 factor controlling the longline fishing ground for 

 bigeye tuna. Bull. Far Seas Fish. Res. Lab 

 (Shimizu) 1:99-114. 



This paper showed the important role of the 

 permanent thermocline as a factor controlling 

 the formation of longline grounds for bigeye 

 tuna. Fishing success depended on whether 

 the hooks reached the permanent thermocline 

 in the tropics. An hypothesis was presented 

 for catch locations of bigeye in tropical and 

 temperate regions. Bigeye inhabited tempera- 

 ture zones within or just below the thermo- 

 cline with no relation apparent to primary 

 productivity. There was a notable increase 

 in average size of fish from west to east. 



KEY WORDS: tuna, yellowfin, bigeye, tempera- 

 ture, thermocline, depth, habitat, currents, 

 water masses, enrichment, discontinuity. 



Suda, A., and M.B. Schaefer. 1965. General review of 

 the Japanese tuna longline fishery in the eastern 

 Pacific Ocean, 1956-1962. Inter-Am. Trop. Tuna 

 Comm. Bull. 9:307-462. 



Considered Japanese longline catch data for 

 the dated period with regard to fishing area 

 and effort, catch, geographical and seasonal 

 distributions, and indices of concentration. 

 Apparent abundance was discussed in terms of 

 seasonal changes, trends, and relation to 

 fishing effort. 



KEY WORDS: tuna, yellowfin, bigeye, alba- 

 core, catch, geography, season, abundance. 



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