Kume, S. 1963. Ecologial studies on bigeye. I. On the 

 distributon of bigeye tuna in the eastern Pacific. 

 Rep. Nankai Reg. Fish. Lab. 17:121-131. 



Described distributional patterns of bigeye 

 in the eastern Pacific. Speculated that ac- 

 cumulations of bigeye were associated with 

 discontinuities of the oceanographic struc- 

 ture. Abundance and density were influenced 

 by the Transition Zone and the subtropical 

 convergence. In the eastern equatorial 

 Pacific, areas of a high density occurred in 

 two east-west zones along the north and south 

 margins of upwellings of cooler water at or 

 near the equator, and seasonal movements of 

 the fish reflected seasonal extensions of the 

 upwelling area. In periods of development of 

 the upwelling area sexually mature bluefin 

 occurred just in the upwelling area. 



KEY WORDS: tuna, bigeye, distribution, sea- 

 son, currents, discontinuity, upwelling, 

 abundance, migration. 



Kume, S. 1969. Ecological studies on bigeye tuna - 

 VI. A review on distribution and size composition 

 of bigeye tuna in the Equatorial and South Pacific 

 Ocean. Bull. Far Seas Fish. Res. Lab. (Shimizu) 

 1:77-98. 



Seasonal variation in distribution of long- 

 line catch was related fairly well to that of 

 upwelling strength along the equator. Spawn- 

 ing occurred throughout the entire equatorial 

 region. A size gradient, with increases from 

 east-to-west, suggested a growth migration. 

 Simultaneous year class appearance in differ- 

 ent areas indicated an internal association 

 of the stock. He therefore concluded the 

 presence of a single stock. 



KEY WORDS: bigeye, stock, season, catch, tem- 

 perature, spawning, distribution, age/size. 



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