2.05 kg, while the smallest caught in Area I v/as a 2,25 kg spccimGn from 

 Station MM, The largest fish takon on this cruise was one from Station :T 

 which weighed 21,0 kg, the same v/oight as the largest fish of the second 

 cruise. On the first cruise few small albacore of 2 to 5 kg vjeight '.7oro 

 taken, but on the second and third cruises a dozen or so small ones wore 

 taken every day. 



Ordinarily the higher the water temperature the larger the fish and 

 contrarinise when the water tomporaturo was leaver, smallor fish were taken, 

 however, this depended on the season. On the third cruise the average 

 water temperature was lower than on the second cruise, nevertheless larger 

 fish were taken. Ordinarily v;hen the largest catch.^s were made the varia- 

 tion in the size of the fish was at a minimum, whereas whan the catch was 

 small thoro was great variation in the sizes of the fish. 



A consideration of those facts seems to indicate that the fish in tho 

 heart of the fishing ground are all of a size while those strung out ahoad 

 and behind on the course of movement are not. Furthermore it appears that 

 at the time of tho second cruise the albacore were moving swiftly because 

 of sudden fluctuations in the water tempGr'-:turc and consequently it vms 

 extremely difficult to arrive at the heart of the fishing ground. 



3, Handling and preservation of tho catch 



Largo fish such as big-eyod tuna and broadbill swordfish v;ere cut open 

 immediately after capture and the gills and viscera were removed, Albacore 

 were not cut but 7;ere v/ashed thoroughly in sea water, wrapped individually 

 in cotton cloth, and packed in ico. Sharks were eviscerated, washed, and 

 then iced. The refrigeration machinery was operated enough to keep the ice 

 in tho fish-holds from melting. On the first cruise the prospects of a 

 full load wore good right from the start and consequently only the fins 

 wore taken from the sharks and most of the carcasses ?ore thrown ovjrboard 

 in order to save space for albacore. However, in the latter part of the 

 cruise in ord r to increase the space for fish stowage, all of the catch 

 except Galeus glaucus was kept in iced brine. Ice was not used in half 

 of this brine, but tho sea water was brought dov;n to below 0°, the catch 

 was put into it and it was then held at about one degree below zero. Skins 

 from sixteen of the discarded sharks were salted down and brought back. 



9. Place sold, method of sale, and prico 



All of the catch was sold at ^'isaki in Kanagawa Prefecture. Sales T.'crc 

 by written bid in tho fish market, just like those of ordinary fishing boats, 

 Prices, commissions, and profits are shown in the table. 



10. Summary of Results of Operations 



A summary of the results of operations is as shown in Table 1. 



52 



