When the frequencies of the occurrence 

 of Be individuals from these areas were com - 

 pared, the relative proportion of Be individuals 

 sampled near Rangiroa was clearly distinct from 

 the frequencies of Be from all other areas sam- 

 pled (P < . 001; £- test). 



The sample from the Marquesas Islands 

 is different from all other areas with respectto 

 the frequency of the occurrence of C-positive 

 individuals (. 05 < P < . 01; ■l- test). 



On the contrary, samples taken from 

 Hawaii, Christmas, and Johnston Islands exhibit 

 marked homogeneity in the frequencies of the 

 characters A, C, and Be. These data indicate 

 the occurrence of at least two reproductively 

 isolated stocks of skipjack in the areas sampled. 



Basin docksite laboratory of the Bureau of Com- 

 mercial Fisheries Biological Laboratory at 

 Honolulu. Such salt ground water is similar to 

 oceanic water but contains only 0. 15 - 0. 69 ml./l. 

 dissolved oxygen. A device was designed to in- 

 crease the amount of oxygen to 95 - 100 percent 

 saturation at rates of flow up to 100 gallons per 

 minute. The aerator was composed of three 

 stacks of 16 trays (each tray 2 feet x 7 feet), 

 spaced at 2 -inch intervals and perforated at half- 

 inch intervals by one-eighth inch holes. Well 

 water was directed onto the top tray and perco- 

 lated down into a collecting basin below. Speci- 

 fications of the aerator, such as number of trays 

 and distance between trays, were based uponthe 

 operation of a test aerator in which these dimen- 

 sions could be altered. 



Further studies are in progress which 

 will attempt to delineate the range and character 

 of these stocks in greater detail. 



Sprague, Lucian M. 



Blood group studies of albacore (Germo 

 alalunga) tuna from the Pacific Ocean. 

 /"Conference Paper III - 107 



Reagents designated as anti-C by virtue 

 of their reactions with the erythrocytes of the 

 skipjack tuna (Katsuwonus pelamis) also recog- 

 nize closely related antigens in the albacore. 



Suda, Akira 



Comparison of abundance between alba- 

 core and b i g e y e in the northwe st 

 Pacific. ^Conference Paper VII - 5. J 

 (In press in Nankai Regional Research 

 Laboratory, Report No. 14. ) 



The possibility of a correlation between 

 albacore and bigeye abundance is discussed 

 using recently accumulated data. Catch and size 

 data of albacore and bigeye taken in the North 

 Pacific Current area during winter longlining 

 operations were used in this study. The data 

 examined were for the years from 1949 to 1959. 



The relative proportions of C-positive 

 individuals of albacore taken in the fisheries of 

 North America and Samoa are highly signifi- 

 cantly different. Of 325 fish taken from North 

 America, 97.5 percent were C-positive, and of 

 74 fish taken from Samoa 85.1 percent were C- 

 positive. These data are interpreted as evi- 

 dence for .reproductive isolation between the 

 North Pacific and South Pacific albacore. 



Data were presented on a blood - group 

 system designated G, in which at least two G 

 blood factors, Gi and G, , are recognized. To 

 date the relative proportions of Gi, G, and " " 

 (the three phenotypes of the G system) are simi- 

 lar for the two areas sampled. 



Strasburg, Donald W. 



An aerating device for salt well water . 

 /Conference Paper IV - l] 



Salt-water wells drilled through h a r d 

 packed coral and sand are used to supply water 

 for the experimental facilities at the Kewalo 



The author used index-S to represent 



relative abundance of fish, and calculated S as 



follows: S =-L£ 5 x,-;, where x - ; is the hooked 

 n i ) X J X J 



rate (catch/100 hooks) in the i-th month and in 



the j-th area, and n is 15 for albacore and 12 for 



bigeye. 



For albacore, there is a strong tendency 

 for index-S to fluctuate with large amplitude 

 either at a high or a low level, which continues 

 for a period of about 3 years and then changes 

 to the opposite level for an approximately equal 

 period. In comparison, the index-S for bigeye 

 appears to be rather stable. However, the 

 annual changes in index-S for both species are 

 somewhat similar when smoothed by a moving 

 average of 3 years. 



The index-S 1 (lengthfrequencies weighted 

 by hooked rate) was used to represent relative 

 abundance of each size group, S 1 being calcula- 

 ted as follows: S 1 = j 5 (rx)-, where r is the 



ratio of the size group and x is the hooked rate 

 in the ij-th stratum. Index-S' shows that the 

 abundance of both species is strongly influenced 



37 



