7-17 7-30 8-14 8-28 9-|l 9-24 

 SAMPLING DATE 



Figure 3. --Results of the 1959 experiment to mark the 

 scales of sockeye salmon fingerlings by short periods 

 of starvation. 



In either year, scales of less than 5 percent 

 of the control fish were judged to be marked. 



Wide variation is noted in the marking 

 success obtained in the three 2-week lots in 

 1960. The first of these exhibited 87-, 92-, 

 100-, and 93-percent marking success after 

 having been back on food for 4, 6, 8, and 10 

 weeks. Only moderate success is noted in the 

 second 2-week test lot even after 8 weeks of 

 renewed feeding, and little marking success 

 was obtained in the third 2-week lot. 



Mortality 



Mortality was not a factor in the 1959 

 experiment. Only one dead fish was noted and 



100 

 50 







100 



50 







100 



50 







100 



50 







100 



50 







100 



50 







6-week starvation lot 



71.4 



CO 0X3 5,4 ,0D 5.3 



^' n 



4-week starvation lot 

 100.0 95,8 



0,0 0,0 3,4 0.0 



2-week Starvation lot 



0.0 0.0 II. I 200 13.3 7.7 III 



, ri .n cp rp n. 



2-week slorvation lot 



3' I 3' I 



35.3 r~| r~| 



0.0 8,2 0.0 M 



2-week storvotion lot 



86.7 92.3 'yii," 93.3 



0.0 0.0 13.3 



0=Star,atlor period 



0.0 0.0 1 1.1 0.0 0.0 0.0 5.7 



1 1 TT^ 1 • 1 ^T- 



7-7 7-21 8-3 8-18 9-2 9-20 10-5 

 SAMPLING DATE 



Figure 4.- -Results of the 1960 experiment to mark the 

 scales of sockeye salmon fingerlings by short periods 

 of starvation. 



that was found on the last day of the experi- 

 ment in the g-week test lot. Mortalities 

 occurred in only the starvation lot in 1960, 

 but these mortalities did not become a 

 factor until the 6th week. Feeding was re- 

 sumed at that time after which mortality 

 reached its peak and then decreased (table 1). 



Growth 



The growth data of the 1959 experiment 

 are presented in table 2 and figure 5. In addi- 

 tion to mean length and mean weight, condition 



100,000 mean weight 

 factor ( mean lengthS ) is presented for 



