Table 3 Catch by Regions (East Philippines Sea) 



Note. The catch rate is the ratio per 100 hooks. 



Table 3 shows the results of the survey made by the Shonan Maru 

 (fisheries research vessel of the Formosa Government-General) from June to 

 September of 1937, in which the catch was almost exclusively composed of 

 yellowfin and black marlin. Table 3 shows clearly the following facts: 



i„ At this season black marlin predominate overwhelmingly in the 

 northern section. 



iio In the central section yellowfin and black marlin are about equal 

 in abundance. 



iiio In the southern section yellowfin are overwhelmingly predominant, 

 iv. Black tuna are most numerous in the source of the Kuroshio and in 

 the Equatorial Current, while yellowfin are more abundant In the Equatorial 

 C ounter current . 



Big-eyed tuna are also taken to some extent. They are scarce in the 

 northern section and increase in abundance in the south, showing the same 

 tendency as the yellowfin. 



The results of a survey of the central section of this area by the 

 Takao Maru (research vessel of Takao Province) in September, 19/+0, exhibit 

 marked differences from those obtained by the Shonan Maru. The area surveyed 

 was the central section and seasonally the Takao Maru's survey was about 

 two months later. The fishing gear of the two vessels differed in its 

 construction, that of the Takao Maru being designed to fish at shallow 

 levels, however, the remarkable differences shown in Table U cannot be 

 thought to be due solely to the construction of the gear and must neces- 

 sarily be regarded as seasonal differences. This means that in this area 

 the movements of the schools are rather marked, and it is thought tl^t 

 around September there is a rather dense concentration of short-nosed 

 marlin. 



(b) South Seas Government-General (0° - 10°N, 130° - 180°E) 



The very remarkable thing about this area, as can be seen clearly 

 from Table 1, is the abundance of big-eyed tuna /~sic_7. Throughout the 

 whole of the year the fishing is somer/hat better than in the South China 



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