catch per unit of effort only in the areas in 

 which the catches of the species were great- 

 est in 1956-68, dividing the Atlantic as shown 

 in Figure 1. Catches were distributed as 

 follows: 



Bluefin 



Albacore 



Bigeye 



Yellowfin 



Swordfish 



- 89% of the catch in NOW, 



GUI, and BAH 



- 86% of the catch in NOW, 



BAH, BEN, and RIO 



- 86% of the catch in GUI, 



CV, GG, and BEN 



- 86% of the catch in GUI, 



CV, and GG 



- 81% of the catch in GUI, 



CV.GG.BAH.andBEN 



White marlin - 72% of the catch in NOW, 



GUI, BAH, and RIO 

 Blue marlin - 72% of the catch in NOW, 



GUI, GG, and BAH 

 Black marlin - 73% of the catch in CV, GG, 



and BAH 

 Sailfish andspearfish - 76% of the catch in GUI, 



GG, BAH, and RIO 



Catch rates of skipjack are calculated for the 

 whole ocean. 



Examination of Figure 2 makes it clear 

 that the contour levels shown for the various 

 species can reflect only relative overall abun- 

 dance and are not necessarily representative 

 of any one year or short series of years. 



Figure 3. — Relative amounts of fishing by the Japanese longline fleet in the Atlantic Ocean, 1956-68. Darkest portion 

 includes 75% of the effort; intermediate shading plus darkest portion includes 95% of the effort; all shaded areas 

 include 99% of the effort. 



8 





