288 



FISHERY BULLETIN OF THE FISH AND WILDLIFE SERVICE 



40° 



•2 



3* «6 



it 2 



IMS 

 • I 



•I 2««3 



• I 



• I 



• 2 

 • 4 



• 3 



• I 



m 



APPROX. AREA OF 

 CAPTURE BY TOYS MARU 



30° 



20° 



10° 



H A Jf 



10° 



•— EUI 



•-M 



PHOENIX 

 IS 



—m- 



lzuL_; — m 



li 51 *— — [501 



<2. 



O 



<* CHRISTMAS I 



ESI— • 



u EARLY DEVELOPING 

 D LATE DEVELOPING 

 A ADVANCED 



180° 



170° 



i 



160° 



" ETJ— • 



e»— — h 



150° 



MARQUESAS 



IS •-m 



M— • 



-^S 



140° 



I 



130° 



120° 



L_^ 



Figure 1. — Localities at which albacore gonads were collected. The Hawaiian and central equatorial Pacific samples 

 consisted only of ovaries (stages of development shown) ; the North Pacific samples included testes and ovaries, all 

 of which were in the early developing stage. (U = early developing, D = late developing, A = advanced stage). 



(fig. 2). Immediately after the fish were landed 

 the gonads were removed and preserved in 10- 

 percent formalin. Data recorded were the date 

 and locality of capture, fork length (weight was 

 not always recorded), and the type of fishing gear. 



In addition to the albacore taken on POFI vessels, 

 we examined ovaries from a catch of albacore 

 landed in Honolulu by a Japanese longline vessel, 

 the Tbyb Maru, in January 1955. This vessel 

 reportedly obtained her catch northwest of the 



