CONTENTS 



Page 



■i-ll uX^UULtO UJ-Cll IP • • • • o t, » e O C <j •■) 9 » O • • • © O b O 1 *> I.. £> <> u .■ .> O O • O (1 O O >■ O D V B o X 



Ac Know x© Q^cnisn t»s e c *«.>»•• c <>•<>&• o ••»• * o ♦«<! o * • ^ o o n «.- u <? n? o « <-<i> u o <> x 



Operational Data „ ..................................... k 



Horizontal distribution of yellowfin tuna ................... h 



Sizes of yellowfin and bigeye ............. ............... Ik 



<J G.p3.riBSQ I 1 Slliri f^ o . ... * c i i • • o a . • i. .,.-.. ^ ... ., o • o « o f o o o o a o c. o o X*4 



Vertical distribution of the catches .... 19 



Catches on experimental gear ...*............................ 27 



ourniiicir y o « • & * o « o o o o o o o o • o « « © » •$ *<.».> » , ., & „ „ ....,,-.»...,. D © « • c c o © o © » o o ^ o 



JjX L>Ci a L/liX L. CX l/C U ••• oeo0O«o«»e*«**ooooeee •ov**o«o«ec * o o • o O • • o _5tC 



ILLUSTRATIONS 



Figure Page 



1 Central Pacific Ocean, showing location of longline 



L> OOOOOOOO 



2 The John R. Manning at the Equator on 180°. The crew 



has just finished setting the longline. ......... 3 



3 Temperature sections corresponding to fishing on l55>°, 

 169°, and 180° ff. longitude. ... ...... ......... .. 9 



h Temperature sections corresponding to fishing on 120° 



and 130° W. longitude. .......................... 10 



5> Tuna catches on five longline -fishing sections across 



the Equator during the period February to June 



J-y J 1 — • *o*«**oeooeo0O«t>oooooe*o«c •••9*00000*0000 »e XX 



