2. Areas of Middle Latitudes 



In the waters east of 140 E. there is a scattering of data centered 

 around 25 N. , but the albacore catch rates are low and not worth recording. 

 West of 140 E. there are some more or less concentrated catches in the 

 area of 22 N. to 26 N. , 134 E. to 136 E. Good fishing grounds are formed 

 in this area from Novennber on, axid the advance signs of this development 

 can be seen even in October. This is called the "Okinotorishima fishing 

 ground, " and it is one of extremely interesting character. 



3. Tropical Seas 



Low catch rates are shown for the region in general, but there is 

 eilways a certain amount of albacore taken. Within the scope of our data, 

 there are cases of rather high catch rates in the extreme eastern part of 

 the area, but judging from conditions in surrounding areas this is probably 

 auionnalous. 



NOVEMBER 

 Ge ne r al 



In November, in the overall picture, the albacore fishing conditions 

 gradually reach their full season stage and, compared with October, fishing 

 is a great deal more active. Not only do fishing conditions become good in 

 the North Pacific grounds, but in the middle latitudes at 20 N. to 25 N. , 

 centered on 135 E. longitude (hereafter this region will be referred to as 

 the Okinotorishima fishing ground), concentrated fishing grounds are formed. 

 However, the so-called Nankai Sea Area ground (centered on Kinan Reef, 

 north of 28 N. at 130 E. to 140 E.) does not as yet show the slightest sign 

 of the formation of fishing grounds. 



1. North Pacific Area 



The fishing grounds east of northeastern Honshu, as compared with 



October, are about 2 of latitude farther south, and they extend a long dis- 



o o 



tance east and west in the vicinity of 31 N. to 40 N. , with the main fishing 



o o 



grounds between 34 N. and 38 N. 



There are hardly any data concerning the oceanographic conditions, 

 but table 1 gives the data from the Fuji Maru, research vessel of Shizuoka 

 Prefecture, collected between November 3 and 28, 1951. 



o 

 Table 2 shows the size of the albacore by areas of 2 of latitude 

 o ■' 



by 10 of longitude. 



20 



