Table Comparing Catches Made by Boats in the South Seas and Japanese Waters 



Boats Fishing Japanese Waters 

 Value of Catch Number of Boats Notes 



under 

 1,000' 

 2,000' 



3,000 

 ^,000 

 5,000' 

 6,000 

 7,000' 

 8,000 

 9,000' 

 10,000 

 11,000 

 over 



total 



1,000 I 



•2,000 



■3,000 



■4,000 



■5,000 



■6,000 



■7,000 



■8,000 



-9,000 



-10,000 



■11,000 



-12,000 



12,000 



8 

 11 



6 

 10 



6 



k 



3 

 13 



3 



3 



8 



2 



81 boats 



(note) Classified by the average value of catch per voyage for each boat 



Boats Fishing South Seas Grounds 

 Value of Catch Number of Boats Notes 



(Note) Classified according to the average value of catch per trip for 

 each boat, 4 TN„ These figures seem far too high in view of what is 

 known about tuna catches and tuna prices in Japan before the war„ It is 

 suggested that they be regarded as unverified and possibly erroneouSe_/ 



(VI) Plankton of the Fishing Ground Areas and the Ecology of the Tuna 



We present here as one type of data for the clarification of the 

 relationship between oceanographic conditions and tuna fishing conditions 



