Report of Results of Develop"ient of ti_'^"-or>^r^. 

 Fishing Grounds 



Miyagi Prefecture Fisheries Experiirent Station, Kesennurar. Pr^'^ch 



1. Npme of vessel - Fiyagi Karu 



2. Type of operation - Exploration of clbacore grounds 



3. Outline of operations 



These experiments xiero carried out in continual tion of the prcviouE 

 year's operations. The I iyagi fcaru of this Branch Station v~s rssignod 

 to Survey Are?! I, ^nd it "^s decided to begin operating in P;ny. The 

 r':iy=^gi i"iaru wpe due for its regular inspoction this ye^-r, =ind on I'^rch 

 2A work ^rs begun on repairs to the hull I'no. engine ^t the As"no docks 

 in YckohaiDa. These prepsrations -.^ere affected by the Incident ^nd took 

 an unexpectedly long time so that the vessel did not raturn to Kescnnujia 

 vjith repairs completed ijntil June L. After this nropar^tions for sailing 

 were hastened and the vessel left on its first cruise June 10 from 

 Kcsennuiia. On this cruise the vessel fished seven times in the offshore 

 Vt'aters and then the radio operator h-^d a cerebral heinhorrage •'^nd uas 

 completely paralyzed so that unfortunately it v;as necessary to halt the 

 operations halfway through. The retvurn voyage v.ts begun July 10 ^nd the 

 vessel reached Kesennumri on the 31st. 



Departure for the second cruise -jib dcl'^yed by the conference '^f 

 seven prefectures .'^nd one ?iorca.n province on oce-^nograDhic 5.nvostigati-!ns, 

 and by prep-ira tions for the sLTiultaneous oceanographic observati^-ns t--' bo 

 carried out in August. The vessel sailed fror Kesennurn August 7 and 

 returned 4-4 days later on September 19. 



On the third cruise the vessel sailed fror,: Kescnni;-i-" Scpto'.'ber .25 

 'vith its return to that port scheduled for October 31. This rarkod the 

 conpletion of operations. 



During these experir.ents supervision was entrusted to Regional 

 Agriculture and Forestry Technicirn Hideichi Yeshida (first -nd third 

 cruises) '■nd Agriculture and Forestry Assist*^nt Technic5.an ''oriji 

 TakizaW'" (second cruise). 



4.. Conditions en the fishing groiinds 



Throughout ^11 three cruises the currents on th-3 fishing groui-;ds 

 were gener'^lly gentle '^nd v.-cre in approximate agrecnent viith the Fr-cific 

 OcGan Current Charts for the period. On the first cruise the currents 

 ^-■ere SE - SSE Y'ith velocities r,f nbout 0.5 - 0.7 knot. On the second 

 and third cruises they v;ere particularly gentle '"nd seened to be eo~o- 

 ?.'hat more easterly. 



The surface water terper?ture showed a ri^xir'ai of 19° "nd a nlnimun 

 of 1Z.7°. On the first and second cruises the difference botv/cen the 

 ternperitures of the surface and riddle laj'-ers ranged fmr one degree 

 tr 10'^ '^t different places, but sone fish 'vere taken on all fishing 

 grounds. On the third cruise ^s the vessel r.aved north'/ard siJirface 



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