waters of Japaric In the spring and summer j, riorthward=f lowing branches 

 stem off from it at various points, and the skipjack which appear in the 

 waters off Japan are cai'ried by these warm currentSc Beginning in the 

 Kagoshima region, they appear successively farther north and finally 

 reach the waters off the southern KurileSo As the cold current of the 

 Oyashio becomes stronger in September and October, the fish move southward 

 and return to the South Seas, but in places like the Okinawa, Kagoshima, 

 Zunan Shoto, and Ogasawara areas, where the warmest parts of the water 

 masses of the warm current systems flow over shoals, they divide into the 

 shpal skipjack, which make the shoals and their vicinities such good 

 fishing grounds, and the deepsea schools which congregate and move in 

 accordance with the developments of the main warm current system. The 

 shoal skipjack schools are present the year round j, while the deepsea 

 schools appear periodically„ 



2, Skipjack of Taiwan 



The skipjack fishery of Taiwan 7»as started by Japanese in 1909= At 

 first, the operations veve carried on between the SenVaku Is„ on the north 

 and Kasho lo and Kotosho on the south and as far east as the waters off 

 Yaeyama„ Since that time, the form of the fishery has gradually been 

 improved and vessels from Kirun,, SuOj Karenko, Taito, and Takao have been 

 operating at great distances from shore. The schools are densely distributed, 

 and both schools of mature fish and schools of small skipjack are seen, An 

 indication of the density in which the fish occur is provided by the figures 

 on the aatch, vrfiich were 491,260 kan in 123Us, 2SU,!^,2k kan in 1935, and 

 A0-i,15^ kan in 



*iich were 491,260 kan in 1934.si 

 1936„ Z 1 l£au 8 8/27"lbs„_7 



There is a limit to the demand for Taiwan skipjack and this operates 

 to control the catch naturally ^, however, the fish are present in dense 

 concentrations throughout the yearo 



3o Philippine Islands 



(1) Batan S^.^^ait to seas east of Luzon =•- This area is traversed by 

 the ascending Tiain stream of the Kuroshio and skipjack schools occur there, 

 but we have no detailed knowledge of them as yet„ 



(2) Samar vicinity ■=«> In this area, there are bays and outlying islands 

 where sardines, mackerel, and mackerel-scad occur, and large schools of 

 skipjack which feed on these fishes concentrate densely between Samar and 

 the Hiraban Is„ 



(3) Southern Mindanao =- Dense schools are always seen from the 

 vicinity of Zamboanga to the eastern part of the Gulf of Davaoo Skipjack 

 are also found in the western waters between Zamboanga and Panay I„ 



(4) West coast of Mindoro I„, Manila Bay — In this area, dense 

 schools are seen 2-3 miles off shore, and many schools of Auxis thazard 

 and small skipjack also o-- :' here. 



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