The following is an attempt to list the catch ratios for tuna grounds 

 which are known at present. These are of course based only on the results 

 of one or several attempts at experimental fishing, but while some of them 

 represent the best records which have been made lately in the areas, most 

 of them can be regarded with some confidence as comparatively accurate 

 average figures. 



The catch ratio is the number of fish taken per 100 hooks, (See the 

 accompanying figure.) 



Equatorial Fishing Grounds Catch Ratio 



sea area south of the Marshalls 



180 miles southeast of Ponape 



300 miles southeast of Truk 



east of Morotai 



east of Halmahera 



north of New Guinea (south of Palau) 



south of Palau (west of Tobi I.) 



Banda Sea (south of Ceram) 



eastern Banda Sea 



southern Banda Sea (west of Tanimbar) H.O " " 



(IV) Records of Catches on Southern Fishing Grounds 



Fishing Ground Catch Records (Oct. 1939 - Jan. 19^4-1) 



1. 600 miles south of Saipan 

 (Fishing Ground A) 



total catch 



yellowfin 

 big-eyed 



65,732 fish 

 46,811 

 7,057 



