rather large numbers of albacore and young yellowfin, bigeye, and black tuna are taken by pole 

 and line fishing, while the catch of fixed gear in some years is by no means small. 



sea area. 



Table 68 sumnnarizes data from the surveys which have been carried on in the Nankai 



Table 68, --Fishing conditions in the Nankai sea area 



The overall average catch rate is slightly over 2, 7. From 60 to 70 percent of the 

 catch is albacore, followed by black marlin and bigeye tuna, Yellowfin are almost without signifi- 

 cance as an objective of the fishery. 



If this area is divided into sections of 2 of longitude, and the fishing situation for each 

 of these sections is plotted, we get the following curves (figure 13), 



UJ 

 O 

 (E 



UJ 



0- I 



I I I I 



O cvi ^ yj 00 

 ro rO K> rO ro 



I 



O <M <J" tC CO 

 ro rO fO rO fO 



E. LONGITUDE 



o o o 



Figure 13, --Catch rates by 2 sections (30 - 35 N. , 



130° - 140° E.) 



100 



