practically imperceptible. Surface water temperatures vrerc 17'' - 20° nn:l 

 the differences from the temperatures at lower levels r/ere comparr.tivcly 

 slight. Transparencies were generally great, reachin:;^ 23 - 27 -neters. 



5. Relationships of weather or currents to schools and bait-taking 



No albacore were taken on the first and seccnd cruises. On the third 

 cruise 19 albacore were caught (three of them shark-eaten) , and on the 

 fourth cruise 4,20 were taken. There were no clear days during fishing 

 operations on the third cruise. Of the six days on which fish were 

 caught, three days were half-clear and three days were overcast. The 

 relationship between weather and bait-taking is not clear because the 

 catch was so small. 



Of six days when fish were caught there was an ESE current one day, 

 NNE currents on three days, and practically no current on the other two 

 days. The results of this cruise make it appear that the albacore are 

 most plentiful north of U3^^, and the catch ratios were best "".'here the 

 surface temperatures were around 17° and those at 50 m.oters around 8°. On 

 the fourth cruise a total of 2^20 albacore were taken, most of them on 

 cloudy days, with clear and rainy days next bvost in that order. On a 

 percentage basis cloudy days accounted for 65% of the whole catch. There 

 were no bright clear days on this cruise. Practically no current was 

 perceptible during fishing operations. /J.bacore were abundant in the 

 vicinity of 163'^E, U3°^, 



6. Methods of keeping bait and the relationship loetween freshness of bait 

 and bait-taking 



The baits employed were salted sardines and, for the 1-^rge hooks, 

 frozen squid and saxiry. They were all stowed in the original '-^^xcs in the 

 fishholds and were packed in crushed ice. The required amount of bait 

 was taken out each time it was to be used, anl the bait remained com,para- 

 tively fresh. The relation of the freshness of the bait to its acceptance 

 by the fish is not clear, however, thr results of using bait made from 

 frozen squid indicate that the fresher it is the better the fish bite on 

 it. Frozen saury were tried f"r use on the large hooks, but compared to 

 frozen squid the catch ratios were poor and the lines were brought in 

 with the baits almost untouched. 



/"a table of data on bait is omitted from the translation here._7 



7. Sizes (length, weight) of the largest and smallest albacore taken and 

 the number and average size of the fish taken in the biggest single catch 



Largest 1 meter long 15.750 kg 

 Smallest jI^S cm long 2.-i37 kg 



The biggest single catch was 200 fish, the average weight of which 

 was 3.575 kg. 



8. Handling and preservation rf the catch 



The albacore were individually wrapped in waxed paper after capture 



138 



