temperatures of 15-16° were encountered ■^nd. nlthough there -irere plrces 

 where the difference between the surface tempornture rsnd that of the 

 middle layers reached a maximum of 5° for the most p?rt there wrs •'^Incst 

 no difference. There v;ere rlso some plpccs •.vhere the temperrture in the 

 middle layers vos 0.2° - 0.6° higher than thnt of the siirfnce, but good 

 fishing v.'as fotrnd on nil groiinds. On nil three cruises the rlbrcore •■;ero 

 fei7 p.nd large v.'hore water temperatures were high, r^nd v;here the v.'oter v:r.s 

 cold the fish wore snail but densely schooling. 



5. Relation of weather and currents to bnit-trking 



On the first and second cruises the fish did not bite r^s v/ell rs 

 expected, but some catch -.v-s had on nil fishing grounds. The catches v/oro 

 extremely sparse r^nd it was v/ondered whether it right not bo because of a 

 seasonal dispersion or because they had roved north into the hii^h latitudes 

 through the sui'face waters. On the third crnisv; quite ^ bit of fish vrs 

 caught in the designated high latitudes, "ov.t in the long run the most 

 important factor in the v;r.y the fish bite is the density of the schools, 

 '?hore the schools are dense the fish bite well, md whore the schools arc 

 sparse they bite b^dly. 



As for the influence of weather, the fish bit 5 v"g11 when it is cloudy 

 or when it looks like rain or after r ch'^nge in the weather. They do not 

 necessarily bite well in the ni-^-st of •" storm.. The relation bet¥ro.;n 

 currents nnd the way the fish bite is not clear, but in general they bite 

 well where the current flo".;s "nd the fishing grounds arc highlj'- mobile. 



6. I'ethods of preserving bnit "nd the relation of freshness of bait to 

 the way the fish bite 



Baits used were frozen squid, frozen mackerel, ^nd salted snrclinos. 

 The frozen bait was kept by refrigeration in the cold storage. On thu 

 first cruise the salted sardines '•■ere purchased at I-. isaki, but for the 

 second and third cruises sardines token in set nets at Kosennurpa wore 

 salted down and preserved in boxes. 



The fish bit bettor, of course, on the fresher bait. Ae for the 

 salted sardines, the fat ones showed "burning", lost their r:loss, and were 

 disappointingly poor bait. With lean sordines there v/rs no burning, the 

 gloss w^.s good, and it apocarod rftor r^ll thrt lean sardines r-;kc better 

 bait. ''Then using them -s live b'it, the fish bite hotter on the fat ones. 

 /~A table of data on b-^it is omitted here in the tr"nslation_j_7 



7. Largest rind smallest albacoro t^ken 



The biggest catch wr-s the 1% fish t"ken en tiie third cruise (Cctcbor 

 15). Fifteen of these fish averaged 70.1 en long and 8.25 --£ in weight. 



Item Weight Length Da te T-'^k.-n 



Largest 18.38 kg 90 cm 8-28 

 Sraiiest 1.50 ^1 9-5 



LOO 



