(b) Relation between v/eather and currents and bait-taking 



Bait-taking appeared to be generally good on days v;hen the ;7aves -.verG 

 high, and when the rise and fall cf the atrac^phcric pri^ssure vas gradual* 

 Good fishing grounds nere found in the vicinity ol iia'js ol discon'.-Tnuity, 

 but fish 7.'ere taken most abundantly -.^hsre warn: waber zones penetrat-jd 

 deeply into cold water zones rather than where cold water penetrated into 

 warm zones. 



6, Methods of holding bait and the relationship between bait- taking and 

 the freshness of bait 



Bait used in these operations was frozen surumQika / Om mastrophes 

 sloani pacif icus_/, frozen mackerel^ and salted sardines. Tho frozen baits 

 were held by or.~.vri^±.\° the r3f^igora■^or sufficiently to keep them cold, and 

 the salted bait was held in the ice-hold. 



A comparison of the catch m.-'.de with squid and mackerel on tho large 

 hooks shows that for big-eyed tu.ia, broadbill swordfish, muror .amo 

 / Isurus glaucus ?_/, and Lariroi.is .r-jria the mackerel is far superior. For 

 albacore and Gale us glaucus tho squid wore ViOro effective, as is shov/n in 

 Table 4. 



Data on bait is shown belovj. /This table is omitted from the translation/ 



7. Sizes of largest and smallest albacore taken, and nuiaber of fish, 

 average size of fish, and type of school of largest catch. 



The average v/eights of albacore are as sho-m in Table 5. The catch 

 of the first cruise shoxTOd tho highest avjra;'^e with 11.165 k^, the third 

 cruise was next with 9.266 kg, and tho second cruise had the smallc;st 

 average with 6,938 kg. As the figure shows, on all three cruises tho finh 

 taken on the large hooks '.'ere the largest, particularly those taken on the 

 center or No, 6 hook, which h-ings deepest in the v/ater, but it is a strange 

 phenomenon and one worthy of study that of the fish takon on the small hooks 

 the largest wore caught on tho branch lines nearest the floats. The catch 

 from the first cruise showed the least variation in the size of the fish, 

 and the secon'^ cruise showed the greatest irregularity in the distribution 

 of the various sizes of fish among the several branch lines. In this 

 respect the third cruise was intermediate between the other two. 



The largest and the smallest fish taken are shown in Table 6. On the 

 first cruise th-. largest was a 24.. 375 kg cpociraen taken on tho fourth day, 

 that is at Station D, and tho smallest, weighing 3.13''^ kg, was takon on the 

 ninth day at Station I. On tho second cruise a fish weighing 21.0 kg taken 

 on the seventh day at Station X was the largest, while the smallest vvas one 

 caught on the third day at Station T -./hich .raighed 1.6'?3 kg, a small size 

 rarely seen. On the third cruise there were many small fish in Areas II and 

 III, Tho smallest taken was one from Station JJ in Area II which weighed 



51 



