MATURITY AGE SEX LONGITUDE 



TIME 

 PERIOD 



SAMPLE 

 SIZE 



LENGTH (CM.) 



25 30 35 40 45 50 55 SO 65 70 75 



H 1 1 1 1 1 1 1 r- 



Figure 17. — Lengths (end of snout to fork of tail) of chum salmon taken in gill nets by 

 Japanese and United States research vessels in May and June 1968. 



maturing age .2 fish were about 45 to 54 cm. 

 long. Mean lengths for maturing age .3 chum 

 salmon were about 52 to 62 cm. and for age 

 .4 fish about 57 to 65 cm. Similar to sockeye 

 salmon, chum salmon taken south of the east- 

 ern Aleutian Islands were usually larger for 

 a given age, sex, and time period than those 

 taken south of the central and western Aleutian 

 Islands. 



Pink Salmon 



Body lengths of pink salmon taken by gill 

 nets varied from 31 to 59 cm.; mean lengths 

 of gill net catches varied from about 40 to 45 

 cm. (fig. 18). The increase in size from west 

 to east that was noted for sockeye and chum 



salmon was not evident for pink salmon. Pink 

 salmon on the cruise track at long. 175° W. 

 were smaller than those on the other two cruise 

 tracks. 



DISTRIBUTION OF LARVAL FISH 



Sampling of larval fish by the Japanese re- 

 search vessels at each salmon fishing station 

 show varying distributions of groups (fig. 19). 

 Hemilepidotus were the most abundant larvae 

 and were found only north of lat. 47° N. 

 Bathymaster larvae had a similar distribution 

 but were less abundant. Most of the Myctoph- 

 idae larvae were south of lat. 48° N. and there- 

 fore primarily south of the larvae of Hemi- 

 lepidotus and Bathymaster. Hexagrammidae 



AGE SEX 



LENGTH (CM.) 



30 35 40 45 50 55 60 



-\ 1 1 1 1 1 



. I Female 



Male 



* 



Figure 18. — Lengths (end of snout to fork of tail) of pink salmon taken in gill nets by 

 Japanese and United States research vessels in May and June 1968. 



21 



