Year 



Oceanographic conditions 



Fishing situation 



1929 A year of low tenperaturesj the 

 cold lower-level water of 2c,0°C 

 or colder had a restricted 

 range; the third branch of the 

 warm current did not reach to 

 east of Kushiro; the breadth 

 of the cold current was great o 



1930 Water temperatures averagej 

 lower level had remarkably 

 low temperature, water of 

 2oO C and colder had a wide 

 range o 



1931 lYater temperatures average; 

 there were three streams of 

 the cold current within 100 

 miles of Kushiro; water 

 temperatures at uO-100 meters 

 were extremely low, 



1932 Water temperatures were low; 

 the third branch of the 

 warm current did not pass 

 the line of Erimosaki; 

 temperatures alcxig that line 

 were lower in August than 

 in July; the Erimo line had 

 lower temperatures than the 

 Kushiro line. 



Kushiro drift nets had their 

 best fishing in 11 years; the 

 fishing grounds did not extend 

 to east of Akkeshi, and were 

 near the coast; large fish pre- 

 dominated; fishing was poor at 

 Etorofu lo and Funkawan; long- 

 line fishing was good west of 

 Erimosaki , 



Kushiro drift nets had moderately 

 good fishing, mostly small tuna; 

 poor fishing at Etorofu To; good 

 fishing for small tuna at Funkawan 

 in August; long-line fishing 

 extremely poor, 



Kushiro drift nets had moderately 

 good fishing, small tuna were 

 very numerous; fishing was poor 

 at Etorofu I o ; fishing was good 

 at Funkawan in October; long-line 

 fishing was ordinary,, 



Kushiro drift nets had very poor 

 fishing, medium tuna were taken 

 in small numbers; good fishing 

 at Urakawa, small tuna remarkably 

 numerous; poor fishing at Etorofu 

 lo; long -line fishing was poor. 



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