Iftble 1 Albacore f Thunnus :if.rr;o_] 



The age deterralnationo In the table arc, as in the preceding papers of thio 

 aeries, based on the article by Dr. Aikswa entitled "The Age of Fishes and 

 Changes in Their Length and Wei^t" (see i ^la^ Fisheries C^siiyo Gyogyo], 

 Volume 4, Number 11). Of the 8 albacore 3 fall in the ninth-year class and 5 

 can be considered to be either eighth- or ninth-year fish. In the case of alba- 

 core those within the ranges of 4.80 - 6.40 }caa in weight and 85 - 94 cm in length 

 are considered to be in their eighth year, and those over 6,40 kan in weight and 

 94 cm in length are regarded as being in their ninth year. Judging from the fact 

 that the oldest albacore are ninth-year fiah, we can see that the albacore which 

 migrate Into Saipan waters, although they are very scarce numerically, belong 

 almost entirely to the largest and oldest part of the stock. 



Table 2 Yollowfin tuna PNeothunnus macropterus l 



No, 



Date 



a i l 1 ' I I I i*n«itf ; qriiii inum— 



Position 



18°1I'N, 

 19°50'N, 

 21^55 'H, 



145°15"E 

 145^02 'E 

 145°01'E 



21^15 'N, 



n 

 n 

 n 

 n 

 n 

 n 



20O20'N, 

 n 



20O07'N, 

 n 



It 



It 



It 



146°25'E 

 It 



n 

 II 

 II 

 It 

 n 

 II 

 n 

 II 



146°20'E 



n 

 n 



U5«'14'E 



n 

 II 

 It 

 n 



27 



