o 

 o 



X 



o 

 o 



o 

 o 





JJASOND.JFMAMJJASO 

 • 1950 4- 1951 



Figure 11. SeasonalFluctuations in the Longline Catch 

 Rate in the Western Pacific. It is of interest to know the times of 

 the year when the Japanese mother ship expeditions experienced the 

 best fishing. The above diagram show& how the catch varied from 

 month to month during 5 months of 1950 and 9 months of 1951, 

 There appear to be two peaks of abundance in this western region; 

 one in midwinter and one in midsummer. The fluctuations in the 

 monthly catch rates are of much smaller magnitude than generally 

 experienced intemperate zone fisheries and there is no nnonth when 

 the catch sags as low as one-third of the peak value. In this 

 instance the average rate of capture by the Japanese was between 

 two and three yellowfin per 100 hooks in most monthSc 



12 



