(b) "a tar temperature, specific gravity, and water color 



The specific gravities and viater colore observed on the fishinfj grounds 

 are shown in Table 3. '"Tiere the water temperatures v/ere generally high, 

 large fish -.lere taken, and uhere the tenperatiu'es v;are lov? the fish caught 

 vere of small size. It' can be percei\'ed fmin the results of last year's 

 survey and from Table 10 of the present report that the highest catch ratios 

 are had '7here there is little difference bet-aeen the water temperatures at 

 the surface and at 50 meters and jvhero the temperature drops rapidly bolo'J 

 100 meters. 



As in the previous year's survey, the specific gravities -.Tore slightly 

 loTJer at the surface, and i;/ore generally favorable all over the fishing 

 grounds . 



The water color v;as determined by the use of Forel's standard fluid, 

 but this was hardly adeqviate to express the color of the v73tor on the fishing 

 grounds. The water colors v;crG in general as shovm in the table; on all 

 cruises the fishing was good \7hero the '.Tatar sho'./cd a v/hitish cast. 



5. Fish schools and signs of life at sea, relation between bait- talcing 

 and the condition of the schools, and relations botvieen weather and 

 currents and bait-taking by the schools 



(a) Schools and signs of life at sea 



On all three cruises there were many sifrns of life on the fishing 

 grounds. Largo and small birds "vero al'^ays seen while steaming and every- 

 where the lines -vere set large numbers of birds gathered around the vessel. 

 At their most abundant there vjere over one hundred birds proaont, and in 

 general the fishing Mas best x7hore the birds ..•ere most plentiful. This 

 phenomenon shov/s a point of difference from the conditions sncountered last 

 year. 



Not one school of albacore •;7as seen on any of the cruises, i%ilo 

 outward boiond on the first cruise a number of albacore -.vere taken by trolling 

 before entering Area III, and one was taken on June 24 at the boundary 

 between Areas II and III. Ttjo more T/ero taken in Area II on the 25th. On 

 the second cruise no fich nero taken by trolling on the trip out, but on 

 the way back one ':,'as taken on August 2 on tho boundary bct'jeen Areas II and 

 III. There were generally more signs of life in and over the soa in Areas 

 II and III than in Area I. 



On the day before reaching Area III on the third cruise a groat many 

 birds wore present and many albacors bit on the trolling lines, but the 

 vessel was traveling at such high speed that moat of the fish had the hooks 

 torn out of their mouths and got away. Sixteen fish were finally boated. 



In Areas II and III sea birds were abundant and were al'.ays following 

 in the v;akc of the vessel, thoir number sometimos increaJ^ing to several 

 score. Birds appeared to be somewhat loss abundant in Area I. 



50 



